CN116219210B - Technological method for producing deep-drawing aluminum plate strip for kitchen ware by using recycled aluminum - Google Patents
Technological method for producing deep-drawing aluminum plate strip for kitchen ware by using recycled aluminum Download PDFInfo
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- CN116219210B CN116219210B CN202211555119.6A CN202211555119A CN116219210B CN 116219210 B CN116219210 B CN 116219210B CN 202211555119 A CN202211555119 A CN 202211555119A CN 116219210 B CN116219210 B CN 116219210B
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 101
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 101
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000005266 casting Methods 0.000 claims abstract description 119
- 238000005096 rolling process Methods 0.000 claims abstract description 55
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000003723 Smelting Methods 0.000 claims abstract description 17
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 17
- 239000000956 alloy Substances 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 16
- 238000000137 annealing Methods 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 238000005336 cracking Methods 0.000 claims abstract description 6
- 238000010008 shearing Methods 0.000 claims abstract description 4
- 238000007670 refining Methods 0.000 claims description 66
- 239000007788 liquid Substances 0.000 claims description 57
- 229910000831 Steel Inorganic materials 0.000 claims description 48
- 239000010959 steel Substances 0.000 claims description 48
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 claims description 34
- 239000000523 sample Substances 0.000 claims description 27
- 239000007789 gas Substances 0.000 claims description 24
- 239000000839 emulsion Substances 0.000 claims description 21
- 239000000498 cooling water Substances 0.000 claims description 17
- 238000005507 spraying Methods 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 239000010731 rolling oil Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 10
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 9
- 239000001307 helium Substances 0.000 claims description 9
- 229910052734 helium Inorganic materials 0.000 claims description 9
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000005238 degreasing Methods 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 239000010439 graphite Substances 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 239000013072 incoming material Substances 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 239000011343 solid material Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 239000010936 titanium Substances 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- 238000009966 trimming Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 3
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 238000005524 ceramic coating Methods 0.000 claims description 3
- 238000005097 cold rolling Methods 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000007872 degassing Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000003345 natural gas Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 3
- 238000003908 quality control method Methods 0.000 claims description 3
- 230000001172 regenerating effect Effects 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 3
- 230000001276 controlling effect Effects 0.000 description 8
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 3
- 208000034656 Contusions Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 208000034526 bruise Diseases 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
- B22D11/003—Aluminium alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0605—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two belts, e.g. Hazelett-process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/0665—Accessories therefor for treating the casting surfaces, e.g. calibrating, cleaning, dressing, preheating
- B22D11/0668—Accessories therefor for treating the casting surfaces, e.g. calibrating, cleaning, dressing, preheating for dressing, coating or lubricating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/068—Accessories therefor for cooling the cast product during its passage through the mould surfaces
- B22D11/0685—Accessories therefor for cooling the cast product during its passage through the mould surfaces by cooling the casting belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Metal Rolling (AREA)
- Continuous Casting (AREA)
Abstract
A process method for producing deep-drawing aluminum plate strips for kitchen ware by using reclaimed aluminum comprises the following specific steps: s1 smelting; s2, standing; s3, tilting the furnace; s4, casting; s5, cooling the cast plate in a transmission way; s6, triple tandem rolling; s7, homogenizing and annealing the blank; s8, rough rolling; s9, intermediate annealing; s10, finish rolling; s11, longitudinal shearing edges. The invention adopts the production of the reclaimed aluminum as the production raw material, promotes the utilization of the reclaimed aluminum, reduces the production cost, controls the alloy component proportion, has stable product performance compared with the existing production process of the hot rolled 3003 alloy and the cast rolled 3003 alloy, greatly reduces the defects of cracking, stripes and the like, meets the deep drawing processing quality requirement, and increases the application range of the product.
Description
Technical Field
The invention relates to the technical field of aluminum plate strip production, in particular to a process method for producing deep-drawing aluminum plate strips for kitchen ware by using reclaimed aluminum.
Background
The aluminum alloy has the advantages of excellent rust resistance, forming and processing characteristics, high corrosion resistance, good weldability and conductivity, moderate strength, impact resistance, difficult rupture and leakage, and suitability for the requirements of kitchen ware and food and beverage containers on strength and rigidity. The thermal power is used for more than 80% of electrolytic aluminum in China, the energy consumption is high, the carbon emission is high, the country has strictly controlled the productivity of the electrolytic aluminum, the reclaimed aluminum uses waste aluminum as a raw material, and the aluminum alloy product is obtained through the working procedures of pretreatment, smelting, refining, casting and the like, and the production energy consumption of the reclaimed aluminum is not more than 5% of the energy consumption of the electrolytic aluminum, so that the method has the advantages of low energy consumption, small pollution and remarkable benefit.
Currently, the 3003 aluminum alloy for kitchen ware mainly uses hot rolling 3003 alloy and cast rolling 3003 alloy; the hot rolled 3003 alloy is subjected to the factors of high processing cost, low yield and the like, and is gradually replaced by cast-rolled 3003 alloy with lower selling price, and the aluminum alloy for kitchen ware in the market at present is mainly cast-rolled 3003 alloy, but the cast-rolled 3003 aluminum alloy has the defects of unstable mechanical property, easiness in cracking in deep drawing and stamping of cookware, heavy surface stripes and the like, influences the quality and production efficiency of the product, and limits the application range of the product.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a process method for producing deep-drawing aluminum plate strips for kitchen ware by using recycled aluminum, which promotes the utilization of the recycled aluminum, reduces the production cost, ensures stable product performance and meets the quality requirements.
The technical scheme adopted by the invention is as follows:
A process method for producing deep-drawing aluminum plate strips for kitchen ware by using reclaimed aluminum comprises the following specific steps:
s1 smelting:
Adding a regenerated aluminum solid material into a smelting-protecting integrated smelting furnace for smelting, heating by a regenerative burner, and leveling the solid material to clean scum after the furnace gas temperature is 800-1000 ℃, wherein a layer of covering agent is uniformly spread on the surface, and the dosage is 0.1-0.5kg/t.Al;
First refining: the refining temperature is 735-770 ℃, carbon tetrachloride is injected into the aluminum liquid from the side surface of a smelting furnace by inserting a graphite rotor of refining equipment into the aluminum liquid, the rotating speed of the rotor is 150-300r/min, the flow rate of the carbon tetrachloride is 0.5-1.5kg/min, 20-30kg of carbon tetrachloride is injected each time, a furnace door is opened, a refining tank is used for taking nitrogen as a carrier, the pressure of the nitrogen is 0.4-0.5MPa, 0.5-1.0kg/t.Al particle refining agent is uniformly injected, electromagnetic stirring is started during refining, and the refining time is 25-35min;
After primary refining, a fully dried sampling spoon and a die are respectively used for taking one sample 400-700mm below the surface of the aluminum liquid at three points on the left, the middle and the right in the furnace, testing alloy components and batching according to the testing result; the alloy comprises the following components: 0.11-0.15% of silicon, 0.31-0.35% of iron, 0.04-0.05% of copper, 0.65-0.85% of manganese, 0.03-0.045% of zirconium, 0.02-0.04% of titanium, 0.05% of magnesium, 0.05% of zinc, 0.02% of other impurities, 0.1% of total impurities and the balance of Al;
Secondary refining: the refining temperature is 740-760 ℃, a graphite rotor of refining equipment is inserted into the aluminum liquid from the side surface of the smelting furnace, carbon tetrachloride is sprayed into the aluminum liquid, 400-700mm below the surface of the aluminum liquid, the rotating speed of the rotor is 150-300r/min, the flow rate of the carbon tetrachloride is 0.5-1.5kg/min, 20-30kg of the carbon tetrachloride is fed into the aluminum liquid each time, electromagnetic stirring is started in the refining process, and the refining time is 25-35min; after secondary refining, scum is scraped clean;
third refining: refining at 740-755 deg.C by the same method as the first refining;
Fourth refining: refining at 740-755 deg.C by the same method as the second refining;
S2, standing:
After refining is finished, a furnace door is opened, 0.1-0.2kg/t.Al of covering agent is added, aluminum melt is kept stand for 40-60min, a heat accumulating burner is in a heat preservation mode during standing, the temperature of furnace gas is controlled to be 750-770 ℃, a thermocouple is used for measuring the temperature of the aluminum melt, the thermocouple penetrates into a position of 400-500mm of aluminum liquid to measure the temperature, the furnace is inclined after time, one side of the furnace door is lifted by a hydraulic device, the aluminum liquid slowly flows into a chute baked by natural gas from an aluminum outlet at the middle position behind the furnace, the baking temperature of the chute is 740-770 ℃, bipolar titanium wires are adopted for adding, the temperature of an adding port is 720+/-5 ℃, online degassing and deslagging are carried out by adopting a rotary blowing method, the scum is cleaned regularly, online double filter boxes are respectively subjected to bipolar filtration;
S3, tilting the furnace:
the casting machine and the three continuous rolling are linked before production, after the baking of the chute is finished, the furnace tilting and discharging of the melting and protecting integrated furnace are carried out, the initial angle of the furnace tilting is 5-9 degrees, the maximum angle of the furnace tilting is less than or equal to 31 degrees, the aluminum liquid temperature of an aluminum outlet at the rear of the furnace is 740-760 ℃, the liquid level of the chute is 220-270mm, the aluminum liquid temperature of an aluminum liquid at a Y-shaped chute opening is 720-730 ℃, the liquid level of the chute is 210-240mm, the aluminum liquid temperature at an outlet of a filter box is 700-710 ℃, the liquid level of the chute is 200-230mm, the aluminum liquid temperature of a front box is 685+/-3 ℃, and the liquid level is 4-5mm, and the float is used for automatic control;
S4, casting:
Casting main technological parameters: the thickness of the blank is 19+/-0.1 mm, the front box is preheated to 100-150 ℃, the casting speed is 6.8-7.8m/min, and the melt temperature of the front box is 685+/-3 ℃; HC3 of steel belt type, 7500-7600mm of steel belt length, 2280-2290mm of steel belt width, 1.27+/-0.1 mm of steel belt thickness, casting surface spraying high-temperature resistant ceramic coating, 19+/-0.1 mm of upper and lower steel belt gap, 18-20 support rollers at the upper part of the casting machine, 19-21 support rollers at the lower part, 6-8 magnetic support rollers at the front part of the upper part and 3-5 magnetic support rollers at the front part of the lower part; cooling water is introduced into one side of the upper and lower steel belts; edge stoppers are respectively arranged on two sides of the steel strip in the width direction to form a closed space; the surfaces of the upper and lower steel belts are sprayed with silicon dioxide powder with the diameter of 15-30nm, and the electrostatic voltage is 10kV; placing an arc casting stop lever with the thickness of 19+/-0.1 mm on the position of the lower steel belt, which is 450-550mm away from the outlet of the casting nozzle, wherein the width of the arc casting stop lever is consistent with the width of the casting plate;
Ultrasonic setting parameters: the ultrasonic frequency is 20-22kHz, a titanium alloy probe is adopted, the diameter of the titanium alloy probe is 40-60mm, and the length of the titanium alloy probe is 400-500mm; the four probes are in a group and are uniformly distributed in the front box, the distance between the probes is 200-300mm, the depth of the probes inserted into the molten aluminum is 30-50mm, and the distance between the probes and the aluminum inlet of the casting nozzle is 250-300mm;
Setting parameters of a casting nozzle and a vertical plate according to quality control requirements: width of nozzle = width of production billet +15mm; the casting nozzle adopts an aluminum silicate integrated forming structure, the flow distribution mode is that multiple channels enter an outlet to be converged, the channel interval is 14mm, the preheating temperature of the casting nozzle is 200-260 ℃, the preheating time is 20-30h, and the casting nozzle is arranged on a casting nozzle support frame and forms an included angle of-5 DEG to-8 DEG with the horizontal plane; the casting nozzle is arranged and fixed on a steel support frame, a 1.5mm aluminum-silicon fiber plate is arranged between the casting nozzle and a lower support, a 3mm aluminum-silicon fiber plate is arranged between the casting nozzle and an upper support, 12 gas channels are respectively arranged at the upper and lower parts of the casting nozzle support frame, helium and oxygen are respectively introduced according to the requirement to adjust the transverse temperature of the casting plate, and the gas pressure is 0.4-0.6MPa; the thickness of the casting nozzle of the aluminum inlet is 25.6 plus or minus 0.05mm, the thickness of the casting nozzle of the outlet is 18.65 plus or minus 0.05mm, and the opening degree of the casting nozzle is 8 plus or minus 0.05mm; vertical plate releasing temperature: 725-735 deg.C;
Starting releasing the liquid level of the front box by 4-5mm, starting a casting machine and a pinch roll 4-5 seconds after releasing, starting electromagnetic heating at the outlet of a casting nozzle, preheating upper and lower steel belts to 100-200 ℃, starting ultrasonic equipment, adjusting the frequency of four probes to 20-22kHz, adjusting the transverse temperature difference of a casting plate by adopting helium and oxygen, wherein the helium pressure is 0.4-0.6MPa, the oxygen pressure is 0.4-0.6MPa, the transverse temperature difference of the casting plate at the outlet of the casting machine is 540-610 ℃, and the transverse temperature difference is less than or equal to 40 ℃;
s5, cooling the cast plate in a transmission way:
Parameters of the spraying device: and setting temperature detection equipment at a distance from the outlet of the casting machine, and monitoring transverse plate temperature data. Setting an automatic induction spraying device at the position of 5-7m of an outlet of the casting machine, spraying emulsion to the wide-plate direction of the casting plate in a zoned manner by using emulsion according to the fluctuation condition of the transverse plate temperature, adjusting the cross section temperature of the casting plate, controlling the cross section temperature to be 490-550 ℃, controlling the transverse temperature difference to be less than or equal to 20 ℃, controlling the emulsion concentration at the plate temperature to be 3.5-4.5% and controlling the emulsion pressure to be 0.3-0.5MPa;
Transmission parameters: spraying at a position 3-4m away from the outlet of the casting plate, matching the speed of casting and the speed of a triple rolling mill by utilizing laser speed measurement and a pinch roll, wherein the ratio of the speed of the pinch roll to the casting speed is 0.95-0.98, and the flow rate of cooling water in the pinch roll is 1.0-1.5m 3/min;
S6, triple tandem rolling:
Frame rolling parameters: the rolling force of a frame at the inlet temperature of 460-520 ℃ is 700+/-20 tons, the unit tension is 0.8+/-0.1 kg/mm, the roughness of a working roll is 3.0 mu m, the convexity of the working roll is-0.13 mm, and the outlet thickness is 12mm;
Two stand rolling parameters: the rolling force is 500+/-20 tons, the unit tension is 0.9+/-0.1 kg/mm, the roughness of the working roll is 1.8 mu m, the convexity of the working roll is-0.12 mm, and the outlet thickness is 9mm;
Three stand rolling parameters: the rolling force is 400+/-10 tons, the unit tension is 1.9+/-0.1 kg/mm, the working roll roughness is 1.0 mu m, the working roll convexity is 0mm, the outlet thickness is 7+/-0.2 mm, and the outlet temperature of the three frames is 190-250 ℃;
The temperature of the spray emulsion for three continuous rolling is 43-52 ℃, the concentration of the emulsion is 3.9-4.2%, and the pressure of the emulsion is 0.4-0.6MPa; coiling a blank with a sleeve of 7+/-0.2 mm, and automatically punching a steel belt after unloading; the template requires convexity of 0-0.6%, longitudinal thickness difference is less than or equal to 0.06mm, two-side difference is less than 0.4%, and cracking edge is less than 3mm;
S7, homogenizing and annealing the blank;
The quality of the incoming material is checked during the annealing of the blank, the staggered layers of the blanks are less than or equal to 3mm, the tower shape is less than or equal to 5mm, fastening head and tail steel belts;
The blank homogenizing process comprises the following steps: raising the temperature of the furnace gas to 580+/-3 ℃ for 4 hours, degreasing by adopting negative pressure in the temperature raising stage, preserving heat for 35 hours at positive pressure at 580+/-3 ℃, then cooling the furnace gas to 170+/-3 ℃ and discharging;
S8, rough rolling:
Cold rolling from 7.0+/-0.2 mm thickness to 1.2mm finished product thickness in 4 passes, wherein the passes are 7.0+/-0.2-4.0-2.4-1.55 respectively;
The first pass: 7.0+/-0.2 mm-4.0mm, an inlet tension of 10+/-2N/mm 2, an outlet tension of 18+/-2N/mm 2, a rolling speed of less than or equal to 380mpm and a rolling oil temperature of 35+/-10 ℃;
Second pass: 4.0mm-2.4mm, an inlet tension of 14+/-2N/mm 2, an outlet tension of 20+/-2N/mm 2, a rolling speed of less than or equal to 380mpm and a rolling oil temperature of 35+/-10 ℃;
Third pass: 2.4mm-1.55mm, an inlet tension of 16+/-2N/mm 2, an outlet tension of 22+/-2N/mm 2, a rolling speed of less than or equal to 650mpm and a rolling oil temperature of 35+/-10 ℃;
s9, intermediate annealing:
checking the quality of the incoming material according to quality standards during intermediate annealing; raising the temperature of the furnace gas to 400+/-3 ℃ for 3 hours, degreasing by adopting negative pressure in the heating stage, preserving heat for 25 hours at the positive pressure of 400+/-3 ℃, then reducing the temperature to 330+/-3 ℃ for 7 hours by 1 hour, and finally reducing the temperature of the furnace gas to 170+/-3 ℃ and cooling and discharging;
S10 finish rolling:
finish rolling for 1 pass, wherein the thickness is 1.55-1.2 mm;
And (3) finished product pass: 1.55mm-1.2mm, an inlet tension of 18+/-2N/mm 2, an outlet tension of 24+/-2N/mm 2, a rolling speed of 400-600mpm and a rolling oil temperature of 40+/-10 ℃;
S11, longitudinal shearing edge:
Transferring the blank with the thickness of 1.2mm to a rewinder for trimming; the coiling tension of the recoiling machine is 19-21kN, the clearance of the cutter discs is 0.056-0.08mm, the overlapping amount of the cutter discs is 0.034-0.056mm, and the trimming speed is 100-150m/min.
Specifically, in the step of S4 casting, cooling water is introduced into one side of the upper steel strip and one side of the lower steel strip, and the specific requirements of the cooling water are as follows: the hardness is less than 1.0mmol/L, the pH value is 6-9, the conductivity is less than or equal to 500us/cm, the water temperature is 30+/-3 ℃, the cooling water pressure is 0.3-0.4MPa, and the total flow rate of cooling water in upper and lower steel belts of the casting machine is 20-30m 3/min.
Specifically, in the step of S4 casting, the specific structure of installing edge stoppers on two sides of the steel strip in the width direction is as follows: the length and width of the baffle blocks are 38mm, the height is 19+/-0.1 mm, the baffle blocks are penetrated into chains one by one, the circumference of the baffle block chains is 10-12mm, the distance between the baffle blocks at the edge is set according to the width of the materials, one side of the baffle blocks, which is contacted with the casting plate, is cleaned up, and the baffle blocks are sprayed with stone ink periodically.
By adopting the technical scheme, the invention has the following advantages:
the invention adopts the production of the reclaimed aluminum as the production raw material, promotes the utilization of the reclaimed aluminum, reduces the production cost, controls the alloy component proportion, has stable product performance compared with the existing production process of the hot rolled 3003 alloy and the cast rolled 3003 alloy, greatly reduces the defects of cracking, stripes and the like, meets the deep drawing processing quality requirement, and increases the application range of the product.
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to limit the scope of the invention, and the purpose of the present invention is to protect all technical improvements within the scope of the present invention.
The invention relates to a process method for producing an aluminum plate strip for kitchen ware by using reclaimed aluminum, which comprises the following specific steps:
s1 smelting:
Adding a regenerated aluminum solid material into a smelting-protecting integrated smelting furnace for smelting, heating by a regenerative burner, and leveling the solid material to clean scum after the furnace gas temperature is 800-1000 ℃, wherein a layer of covering agent is uniformly spread on the surface, and the dosage is 0.1-0.5kg/t.Al;
first refining: the refining temperature is 735-770 ℃, a refining device with the model HD2000 is adopted, a graphite rotor of the refining device is inserted into an aluminum liquid from the side surface of a smelting furnace, carbon tetrachloride is sprayed into the aluminum liquid, 400-700mm below the surface of the aluminum liquid, the rotating speed of the rotor is 150-300r/min, the flow rate of the carbon tetrachloride is 0.5-1.5kg/min, 20-30kg is sprayed each time, a furnace door is opened, a refining tank is used for taking nitrogen as a carrier, the pressure of the nitrogen is 0.4-0.5MPa, 0.5-1.0kg/t.Al particle refining agent is uniformly sprayed, electromagnetic stirring is started during refining, and the refining time is 25-35min;
After primary refining, a fully dried sampling spoon and a die are respectively used for taking one sample 400-700mm below the surface of the aluminum liquid at three points on the left, the middle and the right in the furnace, testing alloy components and batching according to the testing result; the alloy comprises the following components: 0.11-0.15% of silicon, 0.31-0.35% of iron, 0.04-0.05% of copper, 0.65-0.85% of manganese, 0.03-0.045% of zirconium, 0.02-0.04% of titanium, 0.05% of magnesium, 0.05% of zinc, 0.02% of other impurities, 0.1% of total impurities and the balance of Al;
Secondary refining: the refining temperature is 740-760 ℃, a graphite rotor of refining equipment is inserted into the aluminum liquid from the side surface of the smelting furnace, carbon tetrachloride is sprayed into the aluminum liquid, 400-700mm below the surface of the aluminum liquid, the rotating speed of the rotor is 150-300r/min, the flow rate of the carbon tetrachloride is 0.5-1.5kg/min, 20-30kg of the carbon tetrachloride is fed into the aluminum liquid each time, electromagnetic stirring is started in the refining process, and the refining time is 25-35min; after secondary refining, scum is scraped clean;
third refining: refining at 740-755 deg.C by the same method as the first refining;
Fourth refining: the refining temperature is 740-755 ℃, and the refining is carried out by adopting the same method as the second refining.
S2, standing:
After refining is finished, a furnace door is opened, 0.1-0.2kg/t.Al of covering agent is added, aluminum melt is kept stand for 40-60min, a heat accumulating burner is in a heat preservation mode during standing, the temperature of furnace gas is controlled to be 750-770 ℃, a thermocouple is used for measuring the temperature of the aluminum melt, the thermocouple penetrates into a position of 400-500mm of aluminum liquid to measure the temperature, the furnace is inclined after time, one side of the furnace door is lifted by a hydraulic device, the aluminum liquid slowly flows into a chute baked by natural gas from an aluminum outlet at the middle position behind the furnace, the baking temperature of the chute is 740-770 ℃, bipolar titanium wires are adopted for adding, the temperature of an adding port is 720+/-5 ℃, online degassing and deslagging are carried out by adopting a rotary blowing method, the scum is cleaned regularly, and online double filter boxes are used for bipolar filtration.
S3, tilting the furnace:
And after the casting machine and the three continuous rolling are finished, pouring and discharging of the melting and protecting integrated furnace are carried out, wherein the initial angle of the pouring and protecting integrated furnace is 5-9 degrees, the maximum angle of the pouring and protecting integrated furnace is less than or equal to 31 degrees, the aluminum liquid temperature of an aluminum outlet after the furnace is 740-760 ℃, the liquid level of the chute is 220-270mm, the aluminum liquid temperature of a Y-shaped chute opening is 720-730 ℃, the liquid level of the chute is 210-240mm, the aluminum liquid temperature of an outlet of a filter box is 700-710 ℃, the liquid level of the chute is 200-230mm, the aluminum liquid temperature of a front box is 685+/-3 ℃, and the liquid level is 4-5mm, and the float is used for automatic control.
S4, casting:
Casting main technological parameters: the thickness of the blank is 19+/-0.1 mm, the front box is preheated to 100-150 ℃, the casting speed is 6.8-7.8m/min, and the melt temperature of the front box is 685+/-3 ℃; HC3 of steel belt type, 7500-7600mm of steel belt length, 2280-2290mm of steel belt width, 1.27+/-0.1 mm of steel belt thickness, casting surface spraying high-temperature resistant ceramic coating, 19+/-0.1 mm of upper and lower steel belt gap, 18-20 support rollers at the upper part of the casting machine, 19-21 support rollers at the lower part, 6-8 magnetic support rollers at the front part of the upper part and 3-5 magnetic support rollers at the front part of the lower part; cooling water is introduced into one side of the upper and lower steel belts, the specific requirements of the cooling water are as follows: the hardness is less than 1.0mmol/L, the pH value is 6-9, the conductivity is less than or equal to 500us/cm, the water temperature is 30+/-3 ℃, the cooling water pressure is 0.3-0.4MPa, and the total flow rate of cooling water in upper and lower steel belts of a casting machine is 20-30m 3/min; the surfaces of the upper and lower steel belts are sprayed with silicon dioxide powder with the diameter of 15-30nm, and the electrostatic voltage is 10kV; placing an arc casting stop lever with the thickness of 19+/-0.1 mm on the position of the lower steel belt, which is 450-550mm away from the outlet of the casting nozzle, wherein the width of the arc casting stop lever is consistent with the width of the casting plate;
the two sides of the width direction of the steel belt are respectively provided with edge check blocks to form a closed space, and the concrete structure of the edge check blocks is as follows: the length and width of the baffle blocks are 38mm, the height is 19+/-0.1 mm, the baffle blocks are penetrated into chains one by one, the circumference of the baffle block chains is 10-12mm, the distance between the baffle block chains at the edge is set according to the width of the material, one side of the baffle block, which is contacted with the casting plate, is cleaned up, and is sprayed with stone ink periodically;
Ultrasonic setting parameters: the ultrasonic frequency is 20-22kHz, a titanium alloy probe is adopted, the diameter of the titanium alloy probe is 40-60mm, and the length of the titanium alloy probe is 400-500mm; the four probes are in a group and are uniformly distributed in the front box, the distance between the probes is 200-300mm, the depth of the probes inserted into the molten aluminum is 30-50mm, and the distance between the probes and the aluminum inlet of the casting nozzle is 250-300mm;
Setting parameters of a casting nozzle and a vertical plate according to quality control requirements: width of nozzle = width of production billet +15mm; the casting nozzle adopts an aluminum silicate integrated forming structure, the flow distribution mode is that multiple channels enter an outlet to be converged, the channel interval is 14mm, the preheating temperature of the casting nozzle is 200-260 ℃, the preheating time is 20-30h, and the casting nozzle is arranged on a casting nozzle support frame and forms an included angle of-5 DEG to-8 DEG with the horizontal plane; the casting nozzle is arranged and fixed on a steel support frame, a 1.5mm aluminum-silicon fiber plate is arranged between the casting nozzle and a lower support, a 3mm aluminum-silicon fiber plate is arranged between the casting nozzle and an upper support, 12 gas channels are respectively arranged at the upper and lower parts of the casting nozzle support frame, helium and oxygen are respectively introduced according to the requirement to adjust the transverse temperature of the casting plate, and the gas pressure is 0.4-0.6MPa; the thickness of the casting nozzle of the aluminum inlet is 25.6 plus or minus 0.05mm, the thickness of the casting nozzle of the outlet is 18.65 plus or minus 0.05mm, and the opening degree of the casting nozzle is 8 plus or minus 0.05mm; vertical plate releasing temperature: 725-735 deg.C;
Starting releasing the front box with the liquid level of 4-5mm, starting a casting machine and a pinch roll 4-5 seconds after releasing, starting electromagnetic heating at the outlet of a casting nozzle, preheating upper and lower steel belts to 100-200 ℃, starting ultrasonic equipment, and adjusting the frequencies of four probes to 20-22kHz; the transverse temperature difference of the casting plate is regulated by adopting helium and oxygen, the helium pressure is 0.4-0.6MPa, the oxygen pressure is 0.4-0.6MPa, the temperature of the cross section of the casting plate at the outlet of the casting machine is 540-610 ℃, and the transverse temperature difference is less than or equal to 40 ℃.
S5, cooling the cast plate in a transmission way:
Parameters of the spraying device: and setting temperature detection equipment at a distance from the outlet of the casting machine, and monitoring transverse plate temperature data. Setting an automatic induction spraying device at the position of 5-7m of an outlet of the casting machine, spraying emulsion to the wide-plate direction of the casting plate in a zoned manner by using emulsion according to the fluctuation condition of the transverse plate temperature, adjusting the cross section temperature of the casting plate, controlling the cross section temperature to be 490-550 ℃, controlling the transverse temperature difference to be less than or equal to 20 ℃, controlling the emulsion concentration at the plate temperature to be 3.5-4.5% and controlling the emulsion pressure to be 0.3-0.5MPa;
Transmission parameters: and spraying at a position 3-4m away from the outlet of the casting plate, matching the speed of casting and the speed of a triple rolling mill by utilizing laser speed measurement and a pinch roll, wherein the ratio of the speed of the pinch roll to the casting speed is 0.95-0.98, and the cooling water flow in the pinch roll is 1.0-1.5m 3/min.
S6, triple tandem rolling:
Frame rolling parameters: the rolling force of a frame at the inlet temperature of 460-520 ℃ is 700+/-20 tons, the unit tension is 0.8+/-0.1 kg/mm, the roughness of a working roll is 3.0 mu m, the convexity of the working roll is-0.13 mm, and the outlet thickness is 12mm;
Two stand rolling parameters: the rolling force is 500+/-20 tons, the unit tension is 0.9+/-0.1 kg/mm, the roughness of the working roll is 1.8 mu m, the convexity of the working roll is-0.12 mm, and the outlet thickness is 9mm;
Three stand rolling parameters: the rolling force is 400+/-10 tons, the unit tension is 1.9+/-0.1 kg/mm, the working roll roughness is 1.0 mu m, the working roll convexity is 0mm, the outlet thickness is 7+/-0.2 mm, and the outlet temperature of the three frames is 190-250 ℃;
the temperature of the spray emulsion for three continuous rolling is 43-52 ℃, the concentration of the emulsion is 3.9-4.2%, and the pressure of the emulsion is 0.4-0.6MPa; coiling a blank with a sleeve of 7+/-0.2 mm, and automatically punching a steel belt after unloading; the template requires convexity of 0-0.6%, longitudinal thickness difference of less than or equal to 0.06mm, two-side difference of less than 0.4%, and cracking edge of less than 3mm.
S7, homogenizing and annealing the blank;
The quality of the incoming material is checked during the annealing of the blank, the staggered layers of the blanks are less than or equal to 3mm, the tower shape is less than or equal to 5mm, fastening head and tail steel belts;
The blank homogenizing process comprises the following steps: raising the temperature of the furnace gas to 580+/-3 ℃ for 4 hours, degreasing by adopting negative pressure in the heating stage, preserving heat for 35 hours at the positive pressure of 580+/-3 ℃, then cooling the furnace gas to 170+/-3 ℃ and discharging.
S8, rough rolling:
Cold rolling from 7.0+/-0.2 mm thickness to 1.2mm finished product thickness in 4 passes, wherein the passes are 7.0+/-0.2-4.0-2.4-1.55 respectively;
The first pass: 7.0+/-0.2 mm-4.0mm, an inlet tension of 10+/-2N/mm 2, an outlet tension of 18+/-2N/mm 2, a rolling speed of less than or equal to 380mpm and a rolling oil temperature of 35+/-10 ℃;
Second pass: 4.0mm-2.4mm, an inlet tension of 14+/-2N/mm 2, an outlet tension of 20+/-2N/mm 2, a rolling speed of less than or equal to 380mpm and a rolling oil temperature of 35+/-10 ℃;
Third pass: 2.4mm-1.55mm, an inlet tension of 16+/-2N/mm 2, an outlet tension of 22+/-2N/mm 2, a rolling speed of less than or equal to 650mpm and a rolling oil temperature of 35+/-10 ℃.
S9, intermediate annealing:
Checking the quality of the incoming material according to quality standards during intermediate annealing; raising the temperature of the furnace gas to 400+/-3 ℃ for 3 hours, degreasing by adopting negative pressure in the heating stage, preserving heat for 25 hours at 400+/-3 ℃ by adopting positive pressure, then reducing the temperature to 330+/-3 ℃ for 7 hours by using 1 hour, and finally reducing the temperature of the furnace gas to 170+/-3 ℃ and cooling and discharging.
S10 finish rolling:
finish rolling for 1 pass, wherein the thickness is 1.55-1.2 mm;
And (3) finished product pass: 1.55mm-1.2mm, an inlet tension of 18+/-2N/mm 2, an outlet tension of 24+/-2N/mm 2, a rolling speed of 400-600mpm and a rolling oil temperature of 40+/-10 ℃.
S11, longitudinal shearing edge:
Transferring the blank with the thickness of 1.2mm to a rewinder for trimming; the coiling tension of the recoiling machine is 19-21kN, the clearance of the cutter discs is 0.056-0.08mm, the overlapping amount of the cutter discs is 0.034-0.056mm, and the trimming speed is 100-150m/min.
Checking and packaging after finished products are finished, wherein the thickness and the width of the aluminum plate are mainly checked when the finished products are checked, the end face is not required to have burrs and flanging, the bruise is not required to be broken, and the staggered layer is not required to be more than 2mm; the specification and the material of the sleeve must meet the requirements of customers, aluminum plate extending from two sides of sleeve the end faces are 5mm respectively; the tensile strength is required to be 140-160MPa, the elongation is more than or equal to 5%, and the surface has no oil stain and chromatic aberration; and packaging according to the aluminum roll packaging requirement after the inspection is qualified.
The invention is not described in detail in the prior art.
The embodiments selected herein for the purposes of disclosing the invention are presently considered to be suitable, but it is to be understood that the invention is intended to include all such variations and modifications as fall within the spirit and scope of the invention. .
Claims (3)
1. A process method for producing deep-drawing aluminum plate strips for kitchen ware by using recycled aluminum is characterized by comprising the following specific steps:
s1 smelting:
Adding a regenerated aluminum solid material into a smelting-protecting integrated smelting furnace for smelting, heating by a regenerative burner, and leveling the solid material to clean scum after the furnace gas temperature is 800-1000 ℃, wherein a layer of covering agent is uniformly spread on the surface, and the dosage is 0.1-0.5kg/t.Al;
First refining: the refining temperature is 735-770 ℃, carbon tetrachloride is injected into the aluminum liquid from the side surface of a smelting furnace by inserting a graphite rotor of refining equipment into the aluminum liquid, the rotating speed of the rotor is 150-300r/min, the flow rate of the carbon tetrachloride is 0.5-1.5kg/min, 20-30kg of carbon tetrachloride is injected each time, a furnace door is opened, a refining tank is used for taking nitrogen as a carrier, the pressure of the nitrogen is 0.4-0.5MPa, 0.5-1.0kg/t.Al particle refining agent is uniformly injected, electromagnetic stirring is started during refining, and the refining time is 25-35min;
After primary refining, a fully dried sampling spoon and a die are respectively used for taking one sample 400-700mm below the surface of the aluminum liquid at three points on the left, the middle and the right in the furnace, testing alloy components and batching according to the testing result; the alloy comprises the following components: 0.11-0.15% of silicon, 0.31-0.35% of iron, 0.04-0.05% of copper, 0.65-0.85% of manganese, 0.03-0.045% of zirconium, 0.02-0.04% of titanium, 0.05% of magnesium, 0.05% of zinc, 0.02% of other impurities, 0.1% of total impurities and the balance of Al;
Secondary refining: the refining temperature is 740-760 ℃, a graphite rotor of refining equipment is inserted into the aluminum liquid from the side surface of the smelting furnace, carbon tetrachloride is sprayed into the aluminum liquid, 400-700mm below the surface of the aluminum liquid, the rotating speed of the rotor is 150-300r/min, the flow rate of the carbon tetrachloride is 0.5-1.5kg/min, 20-30kg of the carbon tetrachloride is fed into the aluminum liquid each time, electromagnetic stirring is started in the refining process, and the refining time is 25-35min; after secondary refining, scum is scraped clean;
third refining: refining at 740-755 deg.C by the same method as the first refining;
Fourth refining: refining at 740-755 deg.C by the same method as the second refining;
S2, standing:
After refining is finished, a furnace door is opened, 0.1-0.2kg/t.Al of covering agent is added, aluminum melt is kept stand for 40-60min, a heat accumulating burner is in a heat preservation mode during standing, the temperature of furnace gas is controlled to be 750-770 ℃, a thermocouple is used for measuring the temperature of the aluminum melt, the thermocouple penetrates into a position of 400-500mm of aluminum liquid to measure the temperature, the furnace is inclined after time, one side of the furnace door is lifted by a hydraulic device, the aluminum liquid slowly flows into a chute baked by natural gas from an aluminum outlet at the middle position behind the furnace, the baking temperature of the chute is 740-770 ℃, bipolar titanium wires are adopted for adding, the temperature of an adding port is 720+/-5 ℃, online degassing and deslagging are carried out by adopting a rotary blowing method, the scum is cleaned regularly, online double filter boxes are respectively subjected to bipolar filtration;
S3, tilting the furnace:
the casting machine and the three continuous rolling are linked before production, after the baking of the chute is finished, the furnace tilting and discharging of the melting and protecting integrated furnace are carried out, the initial angle of the furnace tilting is 5-9 degrees, the maximum angle of the furnace tilting is less than or equal to 31 degrees, the aluminum liquid temperature of an aluminum outlet at the rear of the furnace is 740-760 ℃, the liquid level of the chute is 220-270mm, the aluminum liquid temperature of an aluminum liquid at a Y-shaped chute opening is 720-730 ℃, the liquid level of the chute is 210-240mm, the aluminum liquid temperature at an outlet of a filter box is 700-710 ℃, the liquid level of the chute is 200-230mm, the aluminum liquid temperature of a front box is 685+/-3 ℃, and the liquid level is 4-5mm, and the float is used for automatic control;
S4, casting:
Casting main technological parameters: the thickness of the blank is 19+/-0.1 mm, the front box is preheated to 100-150 ℃, the casting speed is 6.8-7.8m/min, and the melt temperature of the front box is 685+/-3 ℃; HC3 of steel belt type, 7500-7600mm of steel belt length, 2280-2290mm of steel belt width, 1.27+/-0.1 mm of steel belt thickness, casting surface spraying high-temperature resistant ceramic coating, 19+/-0.1 mm of upper and lower steel belt gap, 18-20 support rollers at the upper part of the casting machine, 19-21 support rollers at the lower part, 6-8 magnetic support rollers at the front part of the upper part and 3-5 magnetic support rollers at the front part of the lower part; cooling water is introduced into one side of the upper and lower steel belts; edge stoppers are respectively arranged on two sides of the steel strip in the width direction to form a closed space; the surfaces of the upper and lower steel belts are sprayed with silicon dioxide powder with the diameter of 15-30nm, and the electrostatic voltage is 10kV; placing an arc casting stop lever with the thickness of 19+/-0.1 mm on the position of the lower steel belt, which is 450-550mm away from the outlet of the casting nozzle, wherein the width of the arc casting stop lever is consistent with the width of the casting plate;
Ultrasonic setting parameters: the ultrasonic frequency is 20-22kHz, a titanium alloy probe is adopted, the diameter of the titanium alloy probe is 40-60mm, and the length of the titanium alloy probe is 400-500mm; the four probes are in a group and are uniformly distributed in the front box, the distance between the probes is 200-300mm, the depth of the probes inserted into the molten aluminum is 30-50mm, and the distance between the probes and the aluminum inlet of the casting nozzle is 250-300mm;
Setting parameters of a casting nozzle and a vertical plate according to quality control requirements: width of nozzle = width of production billet +15mm; the casting nozzle adopts an aluminum silicate integrated forming structure, the flow distribution mode is that multiple channels enter an outlet to be converged, the channel interval is 14mm, the preheating temperature of the casting nozzle is 200-260 ℃, the preheating time is 20-30h, and the casting nozzle is arranged on a casting nozzle support frame and forms an included angle of-5 DEG to-8 DEG with the horizontal plane; the casting nozzle is arranged and fixed on a steel support frame, a 1.5mm aluminum-silicon fiber plate is arranged between the casting nozzle and a lower support, a 3mm aluminum-silicon fiber plate is arranged between the casting nozzle and an upper support, 12 gas channels are respectively arranged at the upper and lower parts of the casting nozzle support frame, helium and oxygen are respectively introduced according to the requirement to adjust the transverse temperature of the casting plate, and the gas pressure is 0.4-0.6MPa; the thickness of the casting nozzle of the aluminum inlet is 25.6 plus or minus 0.05mm, the thickness of the casting nozzle of the outlet is 18.65 plus or minus 0.05mm, and the opening degree of the casting nozzle is 8 plus or minus 0.05mm; vertical plate releasing temperature: 725-735 deg.C;
Starting releasing the liquid level of the front box by 4-5mm, starting a casting machine and a pinch roll 4-5 seconds after releasing, starting electromagnetic heating at the outlet of a casting nozzle, preheating upper and lower steel belts to 100-200 ℃, starting ultrasonic equipment, adjusting the frequency of four probes to 20-22kHz, adjusting the transverse temperature difference of a casting plate by adopting helium and oxygen, wherein the helium pressure is 0.4-0.6MPa, the oxygen pressure is 0.4-0.6MPa, the transverse temperature difference of the casting plate at the outlet of the casting machine is 540-610 ℃, and the transverse temperature difference is less than or equal to 40 ℃;
s5, cooling the cast plate in a transmission way:
Parameters of the spraying device: setting temperature detection equipment at a distance from an outlet of the casting machine, and monitoring transverse plate temperature data; setting an automatic induction spraying device at the position of 5-7m of an outlet of the casting machine, spraying emulsion to the wide-plate direction of the casting plate in a zoned manner by using emulsion according to the fluctuation condition of the transverse plate temperature, adjusting the cross section temperature of the casting plate, controlling the cross section temperature to be 490-550 ℃, controlling the transverse temperature difference to be less than or equal to 20 ℃, controlling the emulsion concentration at the plate temperature to be 3.5-4.5% and controlling the emulsion pressure to be 0.3-0.5MPa;
Transmission parameters: spraying at a position 3-4m away from the outlet of the casting plate, matching the speed of casting and the speed of a triple rolling mill by utilizing laser speed measurement and a pinch roll, wherein the ratio of the speed of the pinch roll to the casting speed is 0.95-0.98, and the flow rate of cooling water in the pinch roll is 1.0-1.5m 3/min;
S6, triple tandem rolling:
Frame rolling parameters: the rolling force of a frame at the inlet temperature of 460-520 ℃ is 700+/-20 tons, the unit tension is 0.8+/-0.1 kg/mm, the roughness of a working roll is 3.0 mu m, the convexity of the working roll is-0.13 mm, and the outlet thickness is 12mm;
Two stand rolling parameters: the rolling force is 500+/-20 tons, the unit tension is 0.9+/-0.1 kg/mm, the roughness of the working roll is 1.8 mu m, the convexity of the working roll is-0.12 mm, and the outlet thickness is 9mm;
Three stand rolling parameters: the rolling force is 400+/-10 tons, the unit tension is 1.9+/-0.1 kg/mm, the working roll roughness is 1.0 mu m, the working roll convexity is 0mm, the outlet thickness is 7+/-0.2 mm, and the outlet temperature of the three frames is 190-250 ℃;
The temperature of the spray emulsion for three continuous rolling is 43-52 ℃, the concentration of the emulsion is 3.9-4.2%, and the pressure of the emulsion is 0.4-0.6MPa; coiling a blank with a sleeve of 7+/-0.2 mm, and automatically punching a steel belt after unloading; the template requires convexity of 0-0.6%, longitudinal thickness difference is less than or equal to 0.06mm, two-side difference is less than 0.4%, and cracking edge is less than 3mm;
S7, homogenizing and annealing the blank;
The quality of the incoming material is checked during the annealing of the blank, the staggered layers of the blanks are less than or equal to 3mm, the tower shape is less than or equal to 5mm, fastening head and tail steel belts;
The blank homogenizing process comprises the following steps: raising the temperature of the furnace gas to 580+/-3 ℃ for 4 hours, degreasing by adopting negative pressure in the temperature raising stage, preserving heat for 35 hours at positive pressure at 580+/-3 ℃, then cooling the furnace gas to 170+/-3 ℃ and discharging;
S8, rough rolling:
Cold rolling from 7.0+/-0.2 mm thickness to 1.2mm finished product thickness in 4 passes, wherein the passes are 7.0+/-0.2-4.0-2.4-1.55 respectively;
The first pass: 7.0+/-0.2 mm-4.0mm, an inlet tension of 10+/-2N/mm 2, an outlet tension of 18+/-2N/mm 2, a rolling speed of less than or equal to 380mpm and a rolling oil temperature of 35+/-10 ℃;
Second pass: 4.0mm-2.4mm, an inlet tension of 14+/-2N/mm 2, an outlet tension of 20+/-2N/mm 2, a rolling speed of less than or equal to 380mpm and a rolling oil temperature of 35+/-10 ℃;
Third pass: 2.4mm-1.55mm, an inlet tension of 16+/-2N/mm 2, an outlet tension of 22+/-2N/mm 2, a rolling speed of less than or equal to 650mpm and a rolling oil temperature of 35+/-10 ℃;
s9, intermediate annealing:
checking the quality of the incoming material according to quality standards during intermediate annealing; raising the temperature of the furnace gas to 400+/-3 ℃ for 3 hours, degreasing by adopting negative pressure in the heating stage, preserving heat for 25 hours at the positive pressure of 400+/-3 ℃, then reducing the temperature to 330+/-3 ℃ for 7 hours by 1 hour, and finally reducing the temperature of the furnace gas to 170+/-3 ℃ and cooling and discharging;
S10 finish rolling:
finish rolling for 1 pass, wherein the thickness is 1.55-1.2 mm;
And (3) finished product pass: 1.55mm-1.2mm, an inlet tension of 18+/-2N/mm 2, an outlet tension of 24+/-2N/mm 2, a rolling speed of 400-600mpm and a rolling oil temperature of 40+/-10 ℃;
S11, longitudinal shearing edge:
Transferring the blank with the thickness of 1.2mm to a rewinder for trimming; the coiling tension of the recoiling machine is 19-21kN, the clearance of the cutter discs is 0.056-0.08mm, the overlapping amount of the cutter discs is 0.034-0.056mm, and the trimming speed is 100-150m/min.
2. The process for producing deep-drawing aluminum plate strips for kitchen ware by using recycled aluminum according to claim 1, wherein the process comprises the following steps of: in the step S4, cooling water is introduced into one side of the upper steel belt and one side of the lower steel belt, and the specific requirements of the cooling water are as follows: the hardness is less than 1.0mmol/L, the pH value is 6-9, the conductivity is less than or equal to 500us/cm, the water temperature is 30+/-3 ℃, the cooling water pressure is 0.3-0.4MPa, and the total flow rate of cooling water in upper and lower steel belts of the casting machine is 20-30m 3/min.
3. The process for producing deep-drawing aluminum plate strips for kitchen ware by using recycled aluminum according to claim 1, wherein the process comprises the following steps of: in the step S4 of casting, the concrete structure of installing the limit stop blocks on two sides of the width direction of the steel belt is as follows: the length and width of the baffle blocks are 38mm, the height is 19+/-0.1 mm, the baffle blocks are penetrated into chains one by one, the circumference of the baffle block chains is 10-12mm, the distance between the baffle blocks at the edge is set according to the width of the materials, one side of the baffle blocks, which is contacted with the casting plate, is cleaned up, and the baffle blocks are sprayed with stone ink periodically.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4235646A (en) * | 1978-08-04 | 1980-11-25 | Swiss Aluminium Ltd. | Continuous strip casting of aluminum alloy from scrap aluminum for container components |
| JP2004156117A (en) * | 2002-11-07 | 2004-06-03 | Nippon Light Metal Co Ltd | Aluminum alloy sheet material excellent in wear resistance and method for producing the same |
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| KR20160120799A (en) * | 2011-09-16 | 2016-10-18 | 볼 코포레이션 | Impact extruded containers from recycled aluminum scrap |
| CN106929719B (en) * | 2017-04-26 | 2018-08-31 | 洛阳龙鼎铝业有限公司 | A kind of preparation method of aluminium foil used for automobile air conditioning |
| CN110983126B (en) * | 2020-01-10 | 2021-06-04 | 广西百矿润泰铝业有限公司 | Preparation method of 5754 alloy aluminum plate for automobile |
| WO2022120639A1 (en) * | 2020-12-09 | 2022-06-16 | Hydro Extruded Solutions As | Aluminium alloy with improved strength and recyclability |
| CN113388748A (en) * | 2021-05-11 | 2021-09-14 | 内蒙古联晟新能源材料有限公司 | Continuous casting and rolling production process of 3003 aluminum alloy strip |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4235646A (en) * | 1978-08-04 | 1980-11-25 | Swiss Aluminium Ltd. | Continuous strip casting of aluminum alloy from scrap aluminum for container components |
| JP2004156117A (en) * | 2002-11-07 | 2004-06-03 | Nippon Light Metal Co Ltd | Aluminum alloy sheet material excellent in wear resistance and method for producing the same |
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