CN1212409C - Compound deoxidant for solid steel - Google Patents
Compound deoxidant for solid steel Download PDFInfo
- Publication number
- CN1212409C CN1212409C CN 02128972 CN02128972A CN1212409C CN 1212409 C CN1212409 C CN 1212409C CN 02128972 CN02128972 CN 02128972 CN 02128972 A CN02128972 A CN 02128972A CN 1212409 C CN1212409 C CN 1212409C
- Authority
- CN
- China
- Prior art keywords
- compound
- molten steel
- calcium
- deoxidizing
- aluminium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910000831 Steel Inorganic materials 0.000 title abstract description 16
- 239000010959 steel Substances 0.000 title abstract description 16
- 150000001875 compounds Chemical class 0.000 title abstract 5
- 239000007787 solid Substances 0.000 title 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 18
- 229910000655 Killed steel Inorganic materials 0.000 claims abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 5
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 5
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims abstract description 5
- 239000004571 lime Substances 0.000 claims abstract description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052788 barium Inorganic materials 0.000 claims abstract description 4
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 4
- 239000011575 calcium Substances 0.000 claims abstract description 4
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 4
- 239000011777 magnesium Substances 0.000 claims abstract description 4
- 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 abstract description 4
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 4
- 239000010703 silicon Substances 0.000 claims abstract description 4
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 3
- 239000000956 alloy Substances 0.000 claims abstract description 3
- 150000003839 salts Chemical class 0.000 claims abstract description 3
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 3
- 239000002131 composite material Substances 0.000 claims description 17
- 239000004411 aluminium Substances 0.000 claims description 14
- 238000005453 pelletization Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 239000010436 fluorite Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 3
- 239000002893 slag Substances 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005266 casting Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract 2
- 238000004220 aggregation Methods 0.000 abstract 1
- 230000002776 aggregation Effects 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 229910001634 calcium fluoride Inorganic materials 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 239000008188 pellet Substances 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 235000019353 potassium silicate Nutrition 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention relates to a compound deoxidizing agent for killed steel, which comprises (wt%) 40 to 70% of active lime, 30 to 60% of aluminum and 5 to 15% of one kind or various kinds of substances selected from calcium fluoride, silica and salts and one kind or various kinds of deoxidizing substances selected from silicon, manganese, barium, magnesium and calcium or the alloy of the silicon, the manganese, the barium, the magnesium and the calcium, and the compound deoxidizing agent is a pellet with the diameter of 20 to 30mm. The compound oxide can be easily aggregated in molten steel, and therefore, the compound oxide rapidly upward floats into slag. Therefore, the casting accident of the blockage of a water inlet because of the aggregation of generated Al2O3 on the water inlet of a molten steel ladle in an aluminum deoxidizing process is prevented.
Description
Technical field
The present invention relates to be used for the composite deoxidant of killed steel.
Background technology
Make deoxidation of molten steel can generate Al with metallic aluminium
2O
3, this deoxidation products accumulates in the place, the mouth of a river of ladle, causes the cast accident thereby stop up the mouth of a river.The top-blown converter steelmaking technology that generally adopts will be blown end point carbon very lowly usually at present, thereby the oxygen level in the molten steel is sharply risen, and need add a large amount of strong reductors for this reason and make deoxidation of molten steel.The most frequently used strong reductor is an aluminium, generally adds when the aluminium amount is 2.5～5kg/T steel to satisfy processing requirement.Because to add the aluminium amount big in the bag, and aluminium generally is added in the bag bottom again, so deoxidation products Al
2O
3Accumulate in the bag bottom in a large number.When cast, these Al
2O
3In ladle nozzle place cohesion, the result blocks the mouth of a river, unwraps at molten steel sometimes to be about to the mouth of a river after only watering 3 minutes and to block.
Be control Al
2O
3Growing amount, once adopted multiple measure, as two step method deoxidation, injection feeding technology, protection cast, but it is little to produce effects.Tracing it to its cause, is not have due to the substantial variation because add the formation of aluminium amount and deoxidation products.
Summary of the invention
The object of the present invention is to provide a kind of novel composite deoxidant that is used for aluminium killed steel, this composite deoxidant contains (weight %) quickened lime 40～70%, aluminium 30～35%, 5～15% be selected from fluorite, silica and the salt one or more materials and 5～10% be selected from one or more deoxidation materials in silicon, manganese, barium, magnesium, calcium and the alloy thereof, these materials can make the fusing point of formed deoxidation products further descend.Composite deoxidant of the present invention is made to pelletizing, so that in a single day wherein contained aluminium become Al
2O
3After, generate low-melting composite oxides CaO-Al with the reaction of wherein active calcium oxide immediately
2O
3And from molten steel, float in the slag rapidly.
Composite deoxidant of the present invention can as water glass or portland cement, be made ball with conventional pelletizer with conventional tackiness agent.Described adhesive consumption is not done special qualification, as long as described raw material can be bonded together; Simultaneously the size and dimension of composite deoxidant ball is not done special qualification, the sphere that is roughly diameter of phi 20～30mm can satisfy service requirements.
The preparation technology of composite deoxidant of the present invention is as follows:
Prepare burden by above-mentioned weight ratio.Used raw material is in advance through being crushed to the granularity of 1～5mm.With the raw material blending of above-mentioned pulverizing, add tackiness agent, make ball with pelletizer and get final product.If make tackiness agent, maintenance need be carried out so that pelletizing reaches required intensity with portland cement.
Embodiment
Embodiment 1 (weight %):
Choose 60% quickened lime, 5% fluorite, 35% aluminium powder and mix, add 10% water glass behind the mixing, further mix again, cause the pelletizing of Φ 25mm then with pelletizer.
Consumption with the 5kg/T steel adds above-mentioned pelletizing in about 95 tons KF11 molten steel, handle the back molten steel and contain oxygen [O]=62.8ppm, [%Als]=0.003% before LF handles.The LF sampling is normal, adds aluminum shot adjustment [%Als] in the LF treating processes to the target value that requires, and the burning casting is in good condition, and mouth of a river internal diameter thickens seldom.
Embodiment 2 (weight %):
Quickened lime 60%, fluorite 5%, aluminium powder 30%, the magnesium powder 5% of choosing granularity 3～5mm mix, and add 10% water glass behind the mixing, further mix again, with pelletizer this material are made the pelletizing of Φ 25mm then.
Consumption with the 5kg/T steel adds above-mentioned pelletizing in low aluminum steel water, handle the back molten steel and contain oxygen [O]=58.3ppm, and all the other treatment steps are with embodiment 1, and continuous casting ring surface quality increases, and the mouth of a river does not have dross.
Composite deoxidant of the present invention has the good deoxidizing capacity similar to aluminium.Because wherein aluminium forms low-melting composite oxides with wherein other component immediately deoxidation after, and these composite oxides are easy to assemble in molten steel, thereby floats in the slag rapidly, when therefore having prevented with aluminium deoxidation because of the Al of generation
2O
3Accumulate in the place, the mouth of a river of ladle, thereby stop up the cast accident at the mouth of a river.
Claims (3)
1, the composite deoxidant that is used for killed steel, it contains (weight %): 40～70% quickened lime, 30～35% aluminium, 5～15% be selected from fluorite, silica and the salt one or more materials and 5～10% be selected from one or more deoxidation materials in silicon, manganese, barium, magnesium, calcium or its alloy.
2, the composite deoxidant that is used for killed steel as claimed in claim 1, this composite deoxidant is the pelletizing shape.
3, the composite deoxidant that is used for killed steel as claimed in claim 2, described composite deoxidant is the pelletizing of diameter of phi 20～30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02128972 CN1212409C (en) | 2002-08-26 | 2002-08-26 | Compound deoxidant for solid steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02128972 CN1212409C (en) | 2002-08-26 | 2002-08-26 | Compound deoxidant for solid steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1394968A CN1394968A (en) | 2003-02-05 |
| CN1212409C true CN1212409C (en) | 2005-07-27 |
Family
ID=4746091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02128972 Expired - Fee Related CN1212409C (en) | 2002-08-26 | 2002-08-26 | Compound deoxidant for solid steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1212409C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100432241C (en) * | 2006-03-24 | 2008-11-12 | 梅才平 | Assistant deoxidizer in use for smelting cold rolled and hot rolled low carbon aluminium-killed steel |
| CN101912875B (en) * | 2010-07-22 | 2012-02-29 | 河北省首钢迁安钢铁有限责任公司 | Method for eliminating edge fault of aluminium killed steel with low manganese-sulfur ratio and low carbon |
| CN101880749A (en) * | 2010-08-16 | 2010-11-10 | 上海盛宝钢铁冶金炉料有限公司 | Al-Ca deoxidizer and production method thereof |
| CN101892350A (en) * | 2010-08-16 | 2010-11-24 | 上海盛宝钢铁冶金炉料有限公司 | Aluminum complex deoxidizer |
| CN101906508A (en) * | 2010-08-16 | 2010-12-08 | 上海盛宝钢铁冶金炉料有限公司 | Aluminum-calcium deoxidizing agent and preparation method thereof |
| CN101880750A (en) * | 2010-08-16 | 2010-11-10 | 上海盛宝钢铁冶金炉料有限公司 | Aluminium compound deoxidizer |
| CN102758062B (en) * | 2012-06-21 | 2013-12-18 | 芜湖县天海耐火炉料有限公司 | Composite silicomanganese deoxidizer and preparation method thereof |
| CN102758064B (en) * | 2012-06-21 | 2013-11-06 | 芜湖县天海耐火炉料有限公司 | Silicon-barium attapulgite deoxidier for steelmaking and preparation method thereof |
| CN102758060B (en) * | 2012-06-21 | 2013-11-06 | 芜湖县天海耐火炉料有限公司 | Silicon-barium-aluminum alloy deoxidier and preparation method thereof |
| CN107523664A (en) * | 2017-08-19 | 2017-12-29 | 江苏标新工业有限公司 | A kind of intermediate frequency furnace desulfurization slag former and preparation method thereof |
-
2002
- 2002-08-26 CN CN 02128972 patent/CN1212409C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1394968A (en) | 2003-02-05 |
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