CN108817337A - Ladle turret argon jetting method and ladle argon-blown revolving platform under continuous casting mode - Google Patents
Ladle turret argon jetting method and ladle argon-blown revolving platform under continuous casting mode Download PDFInfo
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- CN108817337A CN108817337A CN201810754495.5A CN201810754495A CN108817337A CN 108817337 A CN108817337 A CN 108817337A CN 201810754495 A CN201810754495 A CN 201810754495A CN 108817337 A CN108817337 A CN 108817337A
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- argon
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- steel
- argon gas
- molten steel
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 title claims abstract description 446
- 229910052786 argon Inorganic materials 0.000 title claims abstract description 223
- 238000000034 method Methods 0.000 title claims abstract description 65
- 238000009749 continuous casting Methods 0.000 title claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 191
- 239000010959 steel Substances 0.000 claims abstract description 191
- 239000007789 gas Substances 0.000 claims abstract description 104
- 238000007664 blowing Methods 0.000 claims abstract description 38
- 238000010079 rubber tapping Methods 0.000 claims abstract description 28
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 23
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 23
- 239000001301 oxygen Substances 0.000 claims abstract description 23
- 230000008569 process Effects 0.000 claims abstract description 22
- 238000003756 stirring Methods 0.000 claims abstract description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000005266 casting Methods 0.000 claims description 20
- XMPZLAQHPIBDSO-UHFFFAOYSA-N argon dimer Chemical compound [Ar].[Ar] XMPZLAQHPIBDSO-UHFFFAOYSA-N 0.000 claims description 8
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 4
- 238000004033 diameter control Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000003749 cleanliness Effects 0.000 abstract description 12
- 229910045601 alloy Inorganic materials 0.000 abstract description 10
- 239000000956 alloy Substances 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000010924 continuous production Methods 0.000 abstract description 4
- 230000033764 rhythmic process Effects 0.000 abstract description 4
- 230000008094 contradictory effect Effects 0.000 abstract description 3
- 239000011572 manganese Substances 0.000 description 20
- 239000004615 ingredient Substances 0.000 description 15
- 239000004411 aluminium Substances 0.000 description 12
- 229910052748 manganese Inorganic materials 0.000 description 12
- 229910052710 silicon Inorganic materials 0.000 description 12
- 229910052698 phosphorus Inorganic materials 0.000 description 11
- 229910052717 sulfur Inorganic materials 0.000 description 11
- 239000000203 mixture Substances 0.000 description 10
- 239000010813 municipal solid waste Substances 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 7
- 239000000523 sample Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910000914 Mn alloy Inorganic materials 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000005098 hot rolling Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910000616 Ferromanganese Inorganic materials 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000005097 cold rolling Methods 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- PYLLWONICXJARP-UHFFFAOYSA-N manganese silicon Chemical compound [Si].[Mn] PYLLWONICXJARP-UHFFFAOYSA-N 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- -1 soft blow 3min Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- 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
- B22D11/116—Refining the metal
- B22D11/117—Refining the metal by treating with gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/12—Travelling ladles or similar containers; Cars for ladles
- B22D41/13—Ladle turrets
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/068—Decarburising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Ladle turret argon jetting method and ladle argon-blown revolving platform under a kind of continuous casting mode, the method includes the following steps carries out：A, molten steel is tapped：Converter procedure molten steel tapping temperature controls between 1620-1630 DEG C；B, argon station determines oxygen hello aluminum steel：Ladle moves to argon station, and temperature control is between 1600-1610 DEG C before molten steel argon；C, argon station stirs：Molten steel is determined to stir 3-4min in argon station after oxygen and line feeding, and molten steel out-station temperature controls between 1595-1600 DEG C；D, ladle argon-blown：It will be hoisted to conticaster ladle argon-blown revolving platform, Ladle Bottom blowpipe is passed through argon gas, opens argon gas Argon, soft argon blowing time control is in 15-20min.Ladle argon-blown process is moved to continuous casting revolving platform and implemented by the method for the present invention, solves the contradictory problems of molten steel argon blowing time and rhythm of production.While guaranteeing continuous production, Molten Steel Cleanliness and yield of alloy are improved, it is ensured that Molten Steel Cleanliness meets quality.
Description
Technical field
The present invention relates to a kind of steel-smelting technology, in particular to revolving platform steel ladle bottom argon blowing controlling party under a kind of continuous casting mode
Method.
Background technique
Currently, as obtaining now, the simplest refining means of clean steel -- deslagging process is in steelmaking process
Refinery practice is gradually replaced.To guarantee the uniform of Molten Steel Cleanliness in wash heat directly, temperature and ingredient, when executing this technique, steel
Water starts Argon after adjusting ingredient and temperature, and general molten steel need to control between 10-12min in argon station argon blowing time, no
Continuous production will then be had an impact.Ensure the soft blow time (reasonable to improve steel quality in some cases
The time of soft blow argon is longer under the conditions of soft blow argon flow, and steel inclusion removes about thorough), it blows in next furnace molten steel
After, upper one heat steel water is outbound not yet, causes the production problem of the packets such as subsequent tapping.Due to the limitation of argon station argon blowing time,
Argon station Argon process generally use blow firmly, soft blow combine, need converter to have higher tapping temperature to ensure temperature before argon in this way
Meet the requirement of argon blowing time, and higher tapping temperature causes that molten steel oxidation improves, metal charge comparatively high consumption lacks
Point.Longer argon blowing time is used to improve steel quality as a result, and the continuity of STEELMAKING PRODUCTION is kept to be difficult to as a pair
The contradiction of solution.
Summary of the invention
The present invention provides ladle turret argon jetting method under a kind of continuous casting mode, the method improves production technology, will
Molten steel is hung to continuous casting revolving platform and implements argon gas soft blow, extends the lance that molten steel argon blowing time conflicts with rhythm of production to solve
Shield effectively improves steel quality under conditions of guaranteeing continuous production.The present invention also provides the ladles for implementing the method
Argon revolving platform
In order to achieve the above objectives, the technical solution adopted by the present invention is that it is such：
Ladle turret argon jetting method under a kind of continuous casting mode, includes the following steps：
A, molten steel is tapped：Converter procedure molten steel tapping temperature controls between 1620-1630 DEG C；
B, argon station determines oxygen hello aluminum steel：Ladle moves to argon station, detects free oxygen content in molten steel, temperature controls before molten steel argon
Between 1600-1610 DEG C, oxygen content≤5ppm before argon, feed aluminum steel control steel in Al content 0.040%-0.050% it
Between；
C, argon station stirs：Molten steel is determined to stir 3-4min in argon station after oxygen and line feeding, and molten steel out-station temperature is controlled in 1595-
Between 1600 DEG C；
D, ladle argon-blown：It will be hoisted to conticaster ladle argon-blown revolving platform, cover ladle backpack cover, Ladle Bottom blowpipe is passed through
Argon gas opens argon gas Argon, and soft argon blowing time control is in 15-20min.
Ladle turret argon jetting method under above-mentioned continuous casting mode, in above-mentioned Step d Argon process be divided into compressed steel position Argon,
Position Argon both of which of casting carries out, and Argon argon flow control in compressed steel position is controlled in 38-42L/h, pressure in 0.30-
0.35Mpa, when ladle argon-blown revolving platform goes to casting position, Argon pressure extends at any time and successively decreases.
Ladle turret argon jetting method under above-mentioned continuous casting mode, compressed steel position argon blowing time are controlled in 5-10min.
Ladle turret argon jetting method under above-mentioned continuous casting mode, in above-mentioned step c, argon gas is exposed in argon station whipping process
Diameter control is within 300mm.
A kind of ladle argon-blown revolving platform, including pedestal, articulated arm, revolving support assembly and driving device, driving device pass
Dynamic connection revolution support assembly, revolving support assembly connect articulated arm, and articulated arm is equipped with ladle seat, and revolving support assembly is set
Have a central axis and revolving sleeve, the affixed pedestal in central axis bottom is equipped with two argon gas accesses in central axis, each argon gas access into
Gas end connects argon gas control cabinet through argon gas transfer conduit respectively, and revolving sleeve is sleeved on the outside of central axis, and revolving sleeve turns with articulated arm
It is dynamic, set on revolving sleeve there are two argon gas mouth, each argon gas mouth is respectively communicated with the outlet end of each argon gas access, each argon gas mouth respectively with
It is connect through revolving platform argon blowing pipeline with the bottom blowpipe of each ladle.
Above-mentioned ladle argon-blown revolving platform, each argon gas access are made of the vertical section and horizontal segment communicated, the revolution
The inner wall of set is equipped with two annular argon gas slots, the horizontal segment end of every argon gas access respectively with an annular argon gas slot pair
It connects, the two sides up and down of each annular argon gas slot are respectively equipped with sealing ring, and argon gas mouth is connected to annular argon gas slot.
Above-mentioned ladle argon-blown revolving platform, it is quick through double cut-offs between the revolving platform argon blowing pipeline and each Ladle Bottom blowpipe
Connector connection.
Above-mentioned ladle argon-blown revolving platform is respectively equipped with flow pressure table in each argon gas transfer conduit.
Ladle argon-blown process is moved to continuous casting revolving platform and implemented by the method for the present invention, shortens ladle turn around time, solves
The contradictory problems of molten steel argon blowing time and rhythm of production.Using the method for the present invention, the argon blowing time of molten steel is changed by 10-12min
Into for soft blow 15-20min, with the extension of soft blow time, the non-metallic inclusion floating efficiency in molten steel is improved to 85%, is turned
The outbound Baogang's water temperature losses of the process into continuous casting of furnace is reduced to 30-40 DEG C by 45-50 DEG C；With the shortening of ladle turnover process, just
Two block converters are had enough to meet the need two conticasters by 7 ladles under normal production model, are reduced to 6 ladles, packet when ladle seat wraps line
Temperature is served as a contrast by 860 DEG C, is improved to 950 DEG C；Tapping Temperature of Bof is reduced to current 1620-1630 DEG C by 1650 DEG C, deoxygenated alloy
Cost reduces by 2 yuan/t steel, and molten steel, which is tapped, is averaged temperature drop by 95 DEG C to continuous casting process, is reduced to 70 DEG C or so.The method of the present invention
Since coming into operation, stable smooth operation securely and reliably while guaranteeing continuous production, improves Molten Steel Cleanliness and alloy is received
Rate, it is ensured that Molten Steel Cleanliness meets quality.
Detailed description of the invention
Fig. 1 is the schematic diagram of ladle argon-blown revolving platform of the present invention；
Fig. 2 is the structural schematic diagram of central axis and revolving sleeve；
Fig. 3 is the top view of Fig. 2；
Fig. 4 is the partial enlarged view in Fig. 2 at A.
Each list of reference numerals is in figure：1, ladle, 2, articulated arm, 3, revolving support assembly, 4, revolving sleeve, 4-1, annular argon
Air drain, 4-2, argon gas mouth, 5, central axis, 5-1, argon gas access, 6, revolving platform argon blowing pipeline, 7, ladle seat, 8, double cut-offs it is quick
Connector, 9, argon gas control cabinet, 10, flow pressure table, 11, argon gas transfer conduit, 12, driving device, 13, bearing, 14, pedestal,
15, sealing ring.
Specific embodiment
The present invention provides one kind efficiently for extension argon blowing time and the successional contradictory problems of rhythm of production are solved
Routine techniques ladle is improved to by revolving platform steel ladle bottom argon blowing control method under continuous casting mode, the method in argon station Argon
Conticaster ladle argon-blown revolving platform Argon.Ladle turn around time is shortened using the method, improves when blowing only of molten steel
Between, by extending molten steel effective soft blow time, molten steel is stirred using argon gas, promotes steel inclusion Collision coagulation to grow up, and band
Dynamic inclusion floating, improves Molten Steel Cleanliness, significantly reduces molten steel process temperature while improving inclusion floating efficiency
Drop, reduces molten steel tapping temperature, to reduce molten steel terminal oxidisability, improves yield of alloy, it is ensured that molten steel is pure
Cleanliness meets quality requirement.
The method is implemented in converter procedure and continuous casting working procedure：
Converter procedure：According to converter terminal temperature and ingredient before tapping, alloy addition, tapping temperature control are rationally controlled
System is between 1620-1630 DEG C, and atm number stirring ensures that alloy melts effect and deoxidation of molten steel depth in tapping process, strives
Deoxidation in place, and ensures that the elements such as C, Mn, Si meet internal control composition requirement in steel；It is used after molten steel arrival argon station and determines oxygen
Probe determines oxygen, detects and has oxygen content in molten steel by oneself, it is desirable that temperature control is between 1600-1610 DEG C before molten steel argon, and oxygen contains before argon
Amount≤5ppm, Al content control is between 0.040%-0.050% in steel.Molten steel requires to stir in argon station after determining oxygen and line feeding
3-4min, the exposed diameter control of argon gas is in 300mm, it is ensured that stable components in steel.Ingredient, steel in sample examination steel before argon station out
Water out-station temperature controls between 1595-1600 DEG C.
Continuous casting working procedure：After ladle sits on ladle turret, argon gas is passed through in Ladle Bottom blowpipe and starts Argon, when Argon
Between control in 15-20min.Argon process is divided into compressed steel position Argon, casting position Argon both of which carries out, compressed steel position Argon mould
Formula argon flow and pressure are stablized, and argon flow control is controlled in 38-42L/h, pressure in 0.30-0.35Mpa, and compressed steel position is blown
Argon is 5-10min；When ladle argon-blown revolving platform goes to casting position, casting position Argon mode is opened, casting position Argon mode is blown
Argon pressure extends at any time and successively decreases, and slightly being sprung up with ladle liquid level is advisable, and argon gas is exposed to be controlled within 200mm, thus
Ensure to prevent molten steel slag while bottom blowing effect.
To realize that conticaster ladle argon-blown revolving platform Argon, the present invention carry out the structure of traditional ladle turret
It improves, devises a kind of ladle argon-blown revolving platform.Referring to Fig. 1, the ladle argon-blown revolving platform include pedestal 14, articulated arm 2,
Revolving support assembly 3, driving device 12 and argon gas control cabinet 9.Driving device transmission connection revolving support assembly, revolving support
Assembly connects articulated arm, and articulated arm is equipped with ladle seat 7, and ladle 1 is placed on ladle seat.Argon gas control cabinet is ladle bottom blowing
Argon gas provides gas source, the closing and unlatching of the pressure, flow and argon gas of the adjustable argon gas of argon gas control cabinet.
Referring to Fig. 1-Fig. 4, the revolving support assembly is equipped with fixed central axis 5 and returns with what articulated arm rotated synchronously
Pivoted housing 4.The affixed pedestal in central axis bottom, central axis is interior to be equipped with two argon gas access 5-1, and every argon gas access is respectively one
Ladle is for argon gas.The inlet end (lower end) of each argon gas access connects argon gas control cabinet 9, argon gas through argon gas transfer conduit 11 respectively
Transfer conduit is equipped with flow pressure table 10.Revolving sleeve is sleeved on the outside of central axis, and revolving sleeve is connect with revolving support assembly,
Revolving sleeve lower part is equipped with bearing 13.The argon gas mouth 4-2 different there are two height is set on revolving sleeve, each argon gas mouth is respectively communicated with respectively
The outlet end of argon gas access, each argon gas mouth are connect with through revolving platform argon blowing pipeline 6 with the bottom blowpipe of each ladle 1 respectively.Each argon gas
Access is made of the vertical section and horizontal segment communicated, and the inner wall of revolving sleeve is equipped with two annular argon gas slot 4-1, every argon gas
The horizontal segment end of access is docked with an annular argon gas slot respectively, and the two sides up and down of each annular argon gas slot are respectively equipped with sealing
Circle 15, argon gas mouth 4-2 are connected to annular argon gas slot.The process of circulation of argon gas is as follows：Argon gas enters argon gas through argon gas transfer conduit and leads to
The vertical section on road is flowed from the vertical section of argon gas access to horizontal segment, enters annular argon gas slot in the end argon gas of horizontal segment,
Enter revolving platform argon blowing pipeline through argon gas mouth by annular argon gas slot again, ladle is finally entered by the bottom of each ladle.Revolving platform is blown
Through double cut-off quick coupling connections 8 between argon pipeline and each Ladle Bottom blowpipe.When ladle hangs ladle seat and hangs out ladle seat by
Double cut-off quick couplings quickly connect or disconnect Ladle Bottom blowpipe and revolving platform argon blowing pipeline.
Several specific embodiments of the present invention presented below：
Embodiment 1：
Using cold rolling base Q195 as target steel grade, heat (batch) number：81-03033 enters 1366 DEG C of furnace molten iron temperature, hot metal composition：
C：4.59%, Si：0.36%；Mn：0.33%；S：0.023%；P：0.102%, oxygen supply time be 13 points 32 seconds.Steel alloy out
Change using steel-core-aluminium, silicomangan (Al purity > 99%, Al content 70% in steel-core-aluminium；Silicomangan Mn content is
66%).
1629 DEG C of converter molten steel terminal thermometric, terminal sample ingredient：C：0.042%, Mn：0.10%, S：0.016%, P：
0.015%.Terminal ingredient and temperature are suitable, and one pours out steel, and when tapping 1/2 passes through high hopper addition steel-core-aluminium 350Kg, silicon
Manganese alloy 230Kg.Steel ladle full opens argon gas, atm number stirring when tapping.Buggy ladle is opened to converter argon-station after complete steel out,
1609 DEG C of measuring temp of molten steel, after oxygen 3.62ppm before argon, soft blow 3min, sample molten steel composition：C：0.044%, Mn：0.18%, S：
0.019%, P：0.015%, Alt：0.055%, Si：0.020%.Molten steel composition is qualified.Argon gas is opened after furnace stirs 3 point 15
Second, argon gas is exposed to be no more than 300mm, 1589 DEG C of liquid steel temperature is surveyed when preparing outbound, liquid steel temperature is qualified.By buggy ladle open to
Steel position is hung, steel is hung in waiting.The outbound ingredient of molten steel is：C：0.044%, Mn：0.19%, S：0.018%, P：0.015%,
Alt：0.051%, Si：0.020%.The furnace steel finishes to molten steel from converter tapping and hangs the total used time 7min of steel, and next
It has been hung before furnace steel seat ladle toward continuous casting argon blowing, has not caused the packets phenomenon such as lower one heat steel.
Molten steel is hung to conticaster ladle turret, after the good ladle of seat, ladle backpack cover is covered by hydraulic device.Again will
Continuous casting revolving platform argon gas pipeline is connect with the argon blowing pipeline of ladle itself by double cut-off quick couplings, and personnel stand in security bit
Postpone unlatching argon gas, total argon blowing time 15min.This furnace molten steel compressed steel position Argon 7min, cast position Argon 8min.It blows compressed steel position
The control of argon argon flow extends at any time and successively decreases in 0.33Mpa, position Argon Argon pressure of casting in 40L/h, pressure control,
The exposed control of argon gas is within 200mm.Casting process tundish temperature range is between 1554-1559 DEG C, which meets
Normal cast temperature technique requirement is 35 DEG C from the outbound maximum temperature drop that wraps into continuous casting of converter.
Using the Q195 steel billet of above-mentioned technique acquisition, GB10561-2005 is used after hot rolling, is detected nonmetallic in strip
Field trash, strip field trash grade are D0.5, D0.5e.Through calculating, which is 42.94 yuan/t steel, more former work
Skill reduces by 2.03 yuan/t steel.Molten steel blows the time compared with original process extension 5min only, improves field trash agglomeration and the effect that floats
Rate.By reducing molten steel tapping temperature and extending molten steel argon blowing time, deoxygenated alloy cost is effectively reduced, and improve
The cleanliness of molten steel does not occur the abnormal conditions such as wadding stream in ladle, middle packet casting process.
Embodiment 2
Using cold rolling base Q195L as target steel grade, heat (batch) number：82-03093 enters 1385 DEG C of furnace molten iron temperature, hot metal composition：
C：4.55%, Si：0.34%；Mn：0.32%；S：0.020%；P：0.115%, oxygen supply time be 13 points 16 seconds.Steel alloy out
Change using steel-core-aluminium, silicomangan (Al purity > 99%, Al content 70% in steel-core-aluminium；Silicomangan Mn content is
66%).
1628 DEG C of converter molten steel terminal thermometric, terminal sample ingredient：C：0.041%, Mn：0.09%, S：0.015%, P：
0.017%.Terminal ingredient and temperature are suitable, and one pours out steel, and when tapping 1/2 passes through high hopper addition steel-core-aluminium 365Kg, silicon
Manganese alloy 240Kg.Steel ladle full opens argon gas, atm number stirring when tapping.
Buggy ladle is opened to converter argon-station after complete steel out, 1605 DEG C of measuring temp of molten steel, oxygen 3.42ppm before argon, sampling molten steel at
Point：C：0.035%, Mn：0.19%, S：0.014%, P：0.016%, Alt：0.057%, Si：0.022%.Molten steel composition closes
Lattice.Argon gas is opened after furnace and stirs 3 points 40 seconds, and argon gas is exposed to be no more than 300mm, 1590 DEG C of liquid steel temperature is surveyed when preparing outbound, steel
Coolant-temperature gage is qualified.Buggy ladle is opened to steel position is hung, steel is hung in waiting.The outbound ingredient of molten steel is：C：0.036%, Mn：0.19%,
S：0.014%, P：0.016%, Alt：0.054%, Si：0.021%.The furnace steel finishes to molten steel that hang steel total from converter tapping
Used time 8min is counted, and has been hung before lower one heat steel seat ladle toward continuous casting argon blowing, does not cause the packets phenomenon such as lower one heat steel.
Molten steel is hung to conticaster ladle turret, after the good ladle of seat, ladle backpack cover is covered by hydraulic device.Again will
Continuous casting revolving platform argon gas pipeline is connect with the argon blowing pipeline of ladle itself by double cut-off quick couplings, and personnel stand in security bit
Postpone unlatching argon gas, total argon blowing time 17min.This furnace molten steel compressed steel position Argon 6min, casting process Argon 11min.Compressed steel position
The control of Argon argon flow extends at any time and passs in 0.30Mpa, position Argon Argon pressure of casting in 42L/h, pressure control
Subtract, the exposed control of argon gas is within 200mm.Casting process tundish temperature range is the temperature range between 1555-1552 DEG C
Meet normal cast temperature technique requirement, is 38 DEG C from the outbound maximum temperature drop that wrapped into continuous casting of converter.
Using the Q195L steel billet of above-mentioned technique acquisition, GB10561-2005 is used after hot rolling, detects non-gold in strip
Belong to field trash, strip field trash grade is D1.0, D0.5e.Through calculating, which is 43.36 yuan/t steel, more former
Technique reduces by 2.17 yuan/t steel.Molten steel blows the time compared with original process extension 7min only, improves field trash agglomeration and the effect that floats
Rate.By reducing molten steel tapping temperature and extending molten steel argon blowing time, deoxygenated alloy cost is effectively reduced, and improve
The cleanliness of molten steel does not occur the abnormal conditions such as wadding stream in ladle, middle packet casting process.
Embodiment 3：
Using cold rolling base SPHC as target steel grade, heat (batch) number：81-03196 enters 1380 DEG C of furnace molten iron temperature, hot metal composition：
C：4.57%, Si：0.36%；Mn：0.30%；S：0.021%；P：0.105%, oxygen supply time be 12 points 57 seconds.Steel alloy out
Change using steel-core-aluminium, mid-carbon fe-mn alloy (Al purity > 99%, Al content 70% in steel-core-aluminium；Mid-carbon fe-mn Mn content is
74%).
1625 DEG C of converter molten steel terminal thermometric, terminal sample ingredient：C：0.038%, Mn：0.08%, S：0.017%, P：
0.015%.Terminal ingredient and temperature are suitable, and one pours out steel, when tapping 1/2 by high hopper addition steel-core-aluminium 386Kg, in
Carbon ferromanganese 270Kg.Steel ladle full opens argon gas, atm number stirring when tapping.
Buggy ladle is opened to converter argon-station after complete steel out, 1605 DEG C of measuring temp of molten steel, oxygen 3.42ppm before argon, sampling molten steel at
Point：C：0.030%, Mn：0.18%, S：0.015%, P：0.014%, Alt：0.060%, Si：0.008%.Molten steel composition closes
Lattice.Argon gas is opened after furnace and stirs 3 points 10 seconds, and argon gas is exposed to be no more than 300mm, 1587 DEG C of liquid steel temperature is surveyed when preparing outbound, steel
Coolant-temperature gage is qualified.Buggy ladle is opened to steel position is hung, steel is hung in waiting.The outbound ingredient of molten steel is：C：0.030%, Mn：0.18%,
S：0.015%, P：0.014%, Alt：0.053%, Si：0.008%.The furnace steel finishes to molten steel that hang steel total from converter tapping
Used time 7min is counted, and has been hung before lower one heat steel seat ladle toward continuous casting argon blowing, does not cause the packets phenomenon such as lower one heat steel.It will
Molten steel is hung to conticaster ladle turret, after the good ladle of seat, covers ladle backpack cover by hydraulic device.Again by continuous casting revolving platform
Argon gas pipeline is connect with the argon blowing pipeline of ladle itself by double cut-off quick couplings, and personnel open argon in station after home
Gas, total argon blowing time 18min.Argon 8.5min during this furnace molten steel compressed steel, casting process Argon 9.5min.Compressed steel position Argon
Argon flow control extends at any time and successively decreases in 0.35Mpa, position Argon Argon pressure of casting in 38L/h, pressure control, argon
The exposed control of gas is within 200mm.Casting process tundish temperature range is between 1553-1550 DEG C, which meets just
Normal cast temperature technique requirement is 35 DEG C from the outbound maximum temperature drop that wraps into continuous casting of converter.
Using the SPHC steel billet of above-mentioned technique acquisition, GB10561-2005 is used after hot rolling, is detected nonmetallic in strip
Field trash, strip field trash grade are D0.5, D0.5e.Through calculating, which is 44.11 yuan/t steel, more former work
Skill reduces by 2.54 yuan/t steel.Molten steel blows the time compared with original process extension 5min only, improves field trash agglomeration and the effect that floats
Rate.By reducing molten steel tapping temperature and extending molten steel argon blowing time, deoxygenated alloy cost is effectively reduced, and improve
The cleanliness of molten steel does not occur the abnormal conditions such as wadding stream in ladle, middle packet casting process.
Comparative example：
Comparative example is conventionally implemented, and SPHC is target steel grade, heat (batch) number：81-03253 enters furnace molten iron temperature 1373
DEG C, hot metal composition：C：4.52%, Si：0.34%；Mn：0.31%；S：0.020%；P：0.107%, oxygen supply time is 13 points
31 seconds.Steel alloying uses steel-core-aluminium, mid-carbon fe-mn alloy (Al purity > 99%, Al content 70% in steel-core-aluminium out；In
74%) carbon ferromanganese Mn content is.
1645 DEG C of converter molten steel terminal thermometric, terminal sample ingredient：C：0.042%, Mn：0.09%, S：0.019%, P：
0.015%.Terminal ingredient and temperature are suitable, and one pours out steel, when tapping 1/2 by high hopper addition steel-core-aluminium 394Kg, in
Carbon ferromanganese 265Kg.Steel ladle full opens argon gas, atm number stirring when tapping.
Buggy ladle is opened to converter argon-station after complete steel out, 1619 DEG C of measuring temp of molten steel, oxygen 5.42ppm before argon, feeds aluminum steel
40m (16Kg) samples molten steel composition：C：0.038%, Mn：0.19%, S：0.014%, P：0.015%, Alt：0.055%,
Si：0.008%.Molten steel starts soft blow after feeding aluminum steel, and total Argon 11 is divided 10 seconds, and exposed 300mm of argon gas or so prepares
1595 DEG C of liquid steel temperature are surveyed when standing, and buggy ladle are opened to steel position is hung, steel is hung in waiting.The furnace steel is finished from converter tapping to steel
Water hangs steel and amounts to used time 15.5min, in 15min one heat steel (heat (batch) number 81-03254) at present, has been prepared for the thermometric of falling furnace, therefore
Only soft blow 11 divides 10 seconds the furnace steel.Continuous casting casting process temperature range is 1553-1545 DEG C, and temperature losses of the process is 50 DEG C.
The SPHC steel billet that comparative example obtains uses GB10561-2005 after hot rolling, detects nonmetal inclusion in strip
Object, strip field trash grade are D1.5, D0.5e.Through calculating, which is 46.25 yuan/t steel.Because of 1 work of comparative example
Skill is because temperature losses of the process is larger, therefore Tapping Temperature of Hot Metal in Converter is higher, therefore tapping deoxidization alloy dosage is caused to increase, cost liter
It is high.The technique soft blow time is partially short, and steel inclusion floats insufficient, and it is higher to result in nonmetallic inclusionsin steel content, clean
Cleanliness is poor.
It can be seen that by above-described embodiment and comparison, the method for the present invention blows time extension, steel compared to traditional handicraft molten steel only
Water temperature losses of the process lowers, and ladle has enough to meet the need the shortening of process, and nonmetallic inclusionsin steel content is relatively low, and cleanliness is preferable.
Claims (8)
1. ladle turret argon jetting method under a kind of continuous casting mode, it is characterised in that：Include the following steps：
A, molten steel is tapped：Converter procedure molten steel tapping temperature controls between 1620-1630 DEG C；
B, argon station determines oxygen hello aluminum steel：Ladle moves to argon station, detects free oxygen content in molten steel, and temperature control exists before molten steel argon
Between 1600-1610 DEG C, oxygen content≤5ppm before argon, feed aluminum steel control steel in Al content between 0.040%-0.050%；
C, argon station stirs：Molten steel is determined to stir 3-4min in argon station after oxygen and line feeding, and molten steel out-station temperature is controlled at 1595-1600 DEG C
Between；
D, ladle argon-blown：It will be hoisted to conticaster ladle argon-blown revolving platform, cover ladle backpack cover, Ladle Bottom blowpipe is passed through argon gas,
Argon gas Argon is opened, soft argon blowing time control is in 15-20min.
2. ladle turret argon jetting method under continuous casting mode according to claim 1, it is characterised in that：In above-mentioned Step d
Argon process is divided into compressed steel position Argon, casting position Argon both of which carries out, and compressed steel position Argon argon flow is controlled in 38-42L/
H, pressure are controlled in 0.30-0.35Mpa, and when ladle argon-blown revolving platform goes to casting position, Argon pressure extends at any time and passs
Subtract.
3. ladle turret argon jetting method under continuous casting mode according to claim 2, it is characterised in that：When the Argon of compressed steel position
Between control in 5-10min.
4. ladle turret argon jetting method under continuous casting mode according to claim 3, it is characterised in that：In above-mentioned step c,
The exposed diameter control of argon gas is within 300mm in argon station whipping process.
5. a kind of ladle argon-blown revolving platform, including pedestal (14), articulated arm (2), revolving support assembly (3) and driving device
(12), driving device transmission connection revolving support assembly, revolving support assembly connect articulated arm, and articulated arm is equipped with ladle seat
(7), it is characterised in that：Revolving support assembly is equipped with central axis (5) and revolving sleeve (4), the affixed pedestal in central axis bottom, central axis
Two argon gas accesses (5-1) are inside equipped with, the inlet end of each argon gas access is respectively through argon gas transfer conduit (11) connection argon gas control
Cabinet (9), revolving sleeve are sleeved on the outside of central axis, and revolving sleeve is rotated with articulated arm, are set on revolving sleeve there are two argon gas mouth (4-2),
Each argon gas mouth is respectively communicated with the outlet end of each argon gas access, and each argon gas mouth is respectively and through revolving platform argon blowing pipeline (6) and each ladle
(1) bottom blowpipe connection.
6. ladle argon-blown revolving platform according to claim 5, it is characterised in that：Each argon gas access is vertical by what is communicated
Section and horizontal segment are constituted, and the inner wall of the revolving sleeve is equipped with two annular argon gas slots (4-1), the horizontal segment of every argon gas access
End is docked with an annular argon gas slot respectively, and the two sides up and down of each annular argon gas slot are respectively equipped with sealing ring (15), argon gas mouth
(4-2) is connected to annular argon gas slot.
7. ladle argon-blown revolving platform according to claim 6, it is characterised in that：The revolving platform argon blowing pipeline and each ladle
Through double cut-off quick coupling connections (8) between bottom blowpipe.
8. ladle argon-blown revolving platform according to claim 7, it is characterised in that：Stream is respectively equipped in each argon gas transfer conduit
It measures pressure gauge (10).
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110205441A (en) * | 2019-05-23 | 2019-09-06 | 龙南龙钇重稀土科技股份有限公司 | A kind of lid packet mode line feeding station |
| CN111020099A (en) * | 2019-12-16 | 2020-04-17 | 唐山钢铁集团有限责任公司 | Process for continuously casting straight-up medium-thin sheet billet of steel converter for low-carbon cold-rolled base material |
| CN111644584A (en) * | 2020-07-25 | 2020-09-11 | 莱芜钢铁集团银山型钢有限公司 | Soft blowing method and control device for bottom blowing argon of continuous casting ladle turret |
| CN113664172A (en) * | 2021-07-23 | 2021-11-19 | 邯郸钢铁集团有限责任公司 | Continuous casting steel ladle bottom argon blowing control method for smelting heavy rail steel |
| CN116372153A (en) * | 2023-04-13 | 2023-07-04 | 扬州顺达重工设备有限公司 | Ladle turret with adjustable lifting position |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1974795A (en) * | 2006-12-22 | 2007-06-06 | 江苏沙钢集团有限公司 | Refing steel ladle hoisting method and rotating bench unit |
| CN101879592A (en) * | 2010-06-25 | 2010-11-10 | 衡阳华菱连轧管有限公司 | Straight-arm horizontal continuous casting ladle rotary table and method for exchanging ladles by adopting same |
| KR20120028729A (en) * | 2010-09-15 | 2012-03-23 | 동부제철 주식회사 | Apparatus and method for automatically controlling inflowing of argon bubble into laddle |
| CN103302260A (en) * | 2013-06-14 | 2013-09-18 | 内蒙古包钢钢联股份有限公司 | Molten steel argon blowing method used at steel-making continuous casting workstation |
| CN104531953A (en) * | 2015-01-14 | 2015-04-22 | 山东钢铁股份有限公司 | Refining argon blowing method applied to SPHC steel grade |
| CN206824657U (en) * | 2017-06-23 | 2018-01-02 | 江苏沙钢集团有限公司 | Efficient ladle turret |
-
2018
- 2018-07-11 CN CN201810754495.5A patent/CN108817337B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1974795A (en) * | 2006-12-22 | 2007-06-06 | 江苏沙钢集团有限公司 | Refing steel ladle hoisting method and rotating bench unit |
| CN101879592A (en) * | 2010-06-25 | 2010-11-10 | 衡阳华菱连轧管有限公司 | Straight-arm horizontal continuous casting ladle rotary table and method for exchanging ladles by adopting same |
| KR20120028729A (en) * | 2010-09-15 | 2012-03-23 | 동부제철 주식회사 | Apparatus and method for automatically controlling inflowing of argon bubble into laddle |
| CN103302260A (en) * | 2013-06-14 | 2013-09-18 | 内蒙古包钢钢联股份有限公司 | Molten steel argon blowing method used at steel-making continuous casting workstation |
| CN104531953A (en) * | 2015-01-14 | 2015-04-22 | 山东钢铁股份有限公司 | Refining argon blowing method applied to SPHC steel grade |
| CN206824657U (en) * | 2017-06-23 | 2018-01-02 | 江苏沙钢集团有限公司 | Efficient ladle turret |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110205441A (en) * | 2019-05-23 | 2019-09-06 | 龙南龙钇重稀土科技股份有限公司 | A kind of lid packet mode line feeding station |
| CN111020099A (en) * | 2019-12-16 | 2020-04-17 | 唐山钢铁集团有限责任公司 | Process for continuously casting straight-up medium-thin sheet billet of steel converter for low-carbon cold-rolled base material |
| CN111020099B (en) * | 2019-12-16 | 2021-11-09 | 唐山钢铁集团有限责任公司 | Process for continuously casting straight-up medium-thin sheet billet of steel converter for low-carbon cold-rolled base material |
| CN111644584A (en) * | 2020-07-25 | 2020-09-11 | 莱芜钢铁集团银山型钢有限公司 | Soft blowing method and control device for bottom blowing argon of continuous casting ladle turret |
| CN111644584B (en) * | 2020-07-25 | 2022-04-22 | 莱芜钢铁集团银山型钢有限公司 | Soft blowing method and control device for bottom blowing argon of continuous casting ladle turret |
| CN113664172A (en) * | 2021-07-23 | 2021-11-19 | 邯郸钢铁集团有限责任公司 | Continuous casting steel ladle bottom argon blowing control method for smelting heavy rail steel |
| CN116372153A (en) * | 2023-04-13 | 2023-07-04 | 扬州顺达重工设备有限公司 | Ladle turret with adjustable lifting position |
| CN116372153B (en) * | 2023-04-13 | 2025-08-15 | 扬州顺达重工设备有限公司 | Ladle turret with adjustable lifting position |
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