CN1884600A - Method for recarburizing molten steel and alloying vanadium - Google Patents
Method for recarburizing molten steel and alloying vanadium Download PDFInfo
- Publication number
- CN1884600A CN1884600A CNA2006100212335A CN200610021233A CN1884600A CN 1884600 A CN1884600 A CN 1884600A CN A2006100212335 A CNA2006100212335 A CN A2006100212335A CN 200610021233 A CN200610021233 A CN 200610021233A CN 1884600 A CN1884600 A CN 1884600A
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- CN
- China
- Prior art keywords
- vanadium
- molten steel
- alloying
- recarburization
- hot metal
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 61
- 239000010959 steel Substances 0.000 title claims abstract description 61
- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 60
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005275 alloying Methods 0.000 title claims abstract description 22
- 229910000628 Ferrovanadium Inorganic materials 0.000 claims abstract description 11
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000003723 Smelting Methods 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims description 26
- 239000002184 metal Substances 0.000 claims description 26
- 229910052698 phosphorus Inorganic materials 0.000 claims description 12
- 238000010079 rubber tapping Methods 0.000 claims description 11
- 238000006477 desulfuration reaction Methods 0.000 claims description 5
- 230000023556 desulfurization Effects 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 229910052742 iron Inorganic materials 0.000 abstract description 7
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- 230000007547 defect Effects 0.000 abstract 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 229910052786 argon Inorganic materials 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 241001062472 Stokellia anisodon Species 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910004534 SiMn Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000006253 pitch coke Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention provides a low-cost and environment-friendly method for recarburizing and vanadium alloying molten steel. According to the invention, the vanadium-containing molten iron is used for carrying out recarburization and vanadium alloying on the molten steel, so that the traditional molten steel recarburization and vanadium alloying methods are replaced, and on one hand, the defects of environmental pollution, low recarburization agent recovery rate and unstable molten steel components caused by recarburization of the recarburization agent for the molten steel are eliminated; on the other hand, vanadium in molten iron plays a role in vanadium alloying in molten steel, and can greatly reduce or completely replace the use of ferrovanadium. The molten steel produced by the method has stable components and high purity, can obviously improve the smelting rate of steel, and greatly reduces the production cost.
Description
Technical field
The invention belongs to the steel-making metallurgical technology field, the method for particularly a kind of molten steel recarburization and vanadium alloying.
Background technology
At present molten steel recarburization is all adopted carbonaceous materials such as hard coal, pitch coke, in tapping process, add molten steel, because the composition instability of carbonaceous material, the rate of recovery instability and the rate of recovery of carbon are lower, cause the molten steel composition fluctuation bigger, wayward, influence the rate that is smelt of steel grade, and the pollution molten steel of different degree, influence the purity of molten steel; On the other hand, flue dust is big when adding carburelant, also pollutes the environment.
The vanadium alloying of molten steel all adopts the method that adds FeV80 or FeV50 alloy in the tapping process, and costing an arm and a leg of ferro-vanadium is unfavorable for reducing ton steel production cost.
Summary of the invention
Technical problem to be solved by this invention provides the method to molten steel recarburization and vanadium alloying of a kind of low cost, environmental protection.
The technical scheme that technical solution problem of the present invention is adopted is: with the method for vanadium-bearing hot metal to molten steel recarburization and vanadium alloying, after the converter smelting tapping, add vanadium-bearing hot metal.
The invention has the beneficial effects as follows: the present invention carries out carburetting and vanadium alloying with vanadium-bearing hot metal to molten steel, replace the traditional molten steel recarburization and the method for vanadium alloying, eliminate molten steel on the one hand and hang down and the unsettled drawback of molten steel composition with the environmental pollution and the carburelant rate of recovery that carburelant carburetting causes; On the other hand, the vanadium in the molten iron plays the effect of vanadium alloying in molten steel, can reduce or replace fully the use of ferro-vanadium significantly.The molten steel composition that adopts the inventive method to produce is stable, and the molten steel high purity can significantly improve the rate that is smelt of steel, and reduce production costs greatly.
Embodiment
Adopt the step of the inventive method in concrete production process to be: molten iron (half steel) is earlier through converter smelting, in tapping process, add deoxygenated alloys such as Si, Mn, after treating that converter has gone out molten steel, according to tap, go out composition of steel and calculate the vanadium-bearing hot metal amount that needs add, vanadium-bearing hot metal is blended into ladle, Argon is 4～8 minutes then, carries out continuous pouring after LF temperature adjustment and RH vacuum outgas processing.
The weight percent content of endpoint molten steel preferably includes behind the above-mentioned converter smelting: C:0.05～0.20%, P≤0.015%, and terminal temperature is preferably: 1680 ℃～1700 ℃; Above-mentioned vanadium-bearing hot metal is the vanadium-bearing hot metal of desulfurization preferably; The temperature of the vanadium-bearing hot metal that the present invention adopts is best 〉=and 1280 ℃, weight percent content preferably includes: C:4.00～4.60%, V:0.28～0.35%, S≤0.010%, P≤0.080%.
Be the embodiment that adopts method production Properties of Heavy Rail Steel By of the present invention below.
Embodiment 1: production Properties of Heavy Rail Steel By U75V (weight percent content comprises: C:0.70%, V:0.06%, P≤0.025%, Si:0.60%, Mn:0.80%)
110 tons of converter tappings, weight percent content comprises: C:0.10%, V are 0, P≤0.0 15%, Mn:0.05%, smelting endpoint temperature: 1690 ℃.
The weight percent content of the vanadium-bearing hot metal after the desulfurization comprises: C:4.30%, V:0.30%, Si:0.20%, Mn:0.20%, P:0.080%, S＜0.010%, temperature are 1280 ℃.
Calculation of correlation is as follows:
According to the C balance: make C content reach 0.70%, the required vanadium-bearing hot metal weight of carburetting is 18.3 tons.
According to the V balance: after 18.3 tons of vanadium-bearing hot metals are blended into 110 tons of molten steel, V content reaches 0.046% in the molten steel, make V content reach 0.06%, only need add the 17.96kg vanadium, promptly only need add ferro-vanadium (FeV80) 22.45kg, save 76.61% than the 96kg of existing level.
According to the P balance: after being blended into vanadium-bearing hot metal, phosphorus raises to some extent in the molten steel, P content≤0.023% in the steel, but satisfy the requirement of P≤0.025%.
According to Si, Mn balance: can add Si36kg less during alloying, add Mn27.45kg less.
Specific implementation method is: add SiMn alloy 300kg deoxidation in tapping process, after treating that converter has gone out molten steel, after 18.3 tons of molten iron are blended into 110 tons of molten steel, the molten steel gross weight is 128.3 tons, add ferro-vanadium (FeV80) 22.45kg again, Argon is 4 minutes then, carries out continuous pouring after LF temperature adjustment and RH vacuum outgas processing.
Embodiment 2: production Properties of Heavy Rail Steel By PD3 (S) (weight percent content comprises C:0.75%, V:0.04%～0.08%, P≤0.025%, Si:0.60%, Mn:0.80%)
110 tons of converter tappings, weight percent content comprises: C:0.15%, V are 0, P≤0.015%, Mn:0.05%, smelting endpoint temperature: 1690 ℃.
The weight percent content of the vanadium-bearing hot metal after the desulfurization comprises: C:4.20%, V:0.33%, Si:0.20%, Mn:0.20%, P:0.070%, S＜0.010%, temperature are 1290 ℃.
Calculation of correlation is as follows:
According to the C balance: make C content reach 0.75%, the required vanadium-bearing hot metal weight of carburetting is 19.13 tons.
According to the V balance: after 19.13 tons of vanadium-bearing hot metals were blended into 110 tons of molten steel, V content reached 0.049% in the molten steel, satisfied V content and be 0.04～0.08% requirement, therefore can add ferro-vanadium more fully.
According to the P balance: after being blended into vanadium-bearing hot metal, phosphorus raises to some extent in the molten steel, P content≤0.023% in the steel, but satisfy the requirement of P≤0.025%.
According to Si, Mn balance: can add Si38.3kg and Mn38.3kg less during alloying.
Specific implementation method is: add BaCaSi alloy 250kg deoxidation in tapping process, after treating that converter has gone out molten steel, 19.13 tons of molten iron are blended into 110 tons of molten steel after, the molten steel gross weight is 129.13 tons, Argon is 6 minutes then, carries out continuous pouring after LF temperature adjustment and RH vacuum outgas processing.
Embodiment 3: production Properties of Heavy Rail Steel By U75V (R) (weight percent content comprises C:0.75%, V:0.04%～0.012%, P≤0.025%, Si:0.60%, Mn:0.80%)
110 tons of converter tappings, weight percent content comprises: C:0.08%, V are 0, P≤0.010%, Mn:0.05%, smelting endpoint temperature: 1690 ℃.
The weight percent content of the vanadium-bearing hot metal after the desulfurization comprises: C:4.30%, V:0.34%, Si:0.20%, Mn:0.20%, P:0.070%, S＜0.010%, temperature are 1290 ℃.
Calculation of correlation is as follows:
According to the C balance: make C content reach 0.75%, the required vanadium-bearing hot metal weight of carburetting is 20.76 tons.
According to the V balance: after 20.76 tons of vanadium-bearing hot metals were blended into 110 tons of molten steel, V content reached 0.054% in the molten steel, satisfied V content and be 0.04～0.12% requirement, need not add ferro-vanadium again.
According to the P balance: after being blended into vanadium-bearing hot metal, phosphorus raises to some extent in the molten steel, P content≤0.0195% in the steel, but satisfy the requirement of P≤0.025%.
According to Si, Mn balance: can add Si41.52kg and Mn41.52kg less during alloying.
Specific implementation method is: add BaCaSi alloy 250kg deoxidation in tapping process, after treating that converter has gone out molten steel, 20.76 tons of molten iron are blended into 110 tons of molten steel after, the molten steel gross weight is 130.76 tons, Argon is 8 minutes then, carries out continuous pouring after LF temperature adjustment and RH vacuum outgas processing.
Claims (6)
1, the method for molten steel recarburization and vanadium alloying is characterized in that: after the converter smelting tapping, add vanadium-bearing hot metal.
2, the method for molten steel recarburization as claimed in claim 1 and vanadium alloying is characterized in that: after adding vanadium-bearing hot metal, when the weight percent content of the V in the molten steel can not reach requirement, add ferro-vanadium.
3, the method for molten steel recarburization as claimed in claim 1 and vanadium alloying is characterized in that: described vanadium-bearing hot metal is the vanadium-bearing hot metal of desulfurization.
4, the method for molten steel recarburization as claimed in claim 1 and vanadium alloying is characterized in that: the weight percent content of described vanadium-bearing hot metal comprises: C:4.00～4.60%, V:0.28～0.35%, S≤0.010%, P≤0.080%.
5, the method for molten steel recarburization as claimed in claim 1 and vanadium alloying is characterized in that: the temperature of described vanadium-bearing hot metal 〉=1280 ℃.
6, the method for molten steel recarburization as claimed in claim 1 and vanadium alloying is characterized in that: the terminal temperature of described converter smelting is 1680～1700 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100212335A CN100395364C (en) | 2006-06-23 | 2006-06-23 | Method for recarburizing molten steel and alloying vanadium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100212335A CN100395364C (en) | 2006-06-23 | 2006-06-23 | Method for recarburizing molten steel and alloying vanadium |
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| Publication Number | Publication Date |
|---|---|
| CN1884600A true CN1884600A (en) | 2006-12-27 |
| CN100395364C CN100395364C (en) | 2008-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100212335A Expired - Fee Related CN100395364C (en) | 2006-06-23 | 2006-06-23 | Method for recarburizing molten steel and alloying vanadium |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925616A (en) * | 2011-08-08 | 2013-02-13 | 攀钢集团有限公司 | Smelting method of vanadium-containing molten iron |
| CN102994871A (en) * | 2012-11-22 | 2013-03-27 | 河北钢铁股份有限公司承德分公司 | Method for smelting medium/high-carbon hard-wired steel by vanadium-titanium containing molten iron |
| CN105018670A (en) * | 2015-07-15 | 2015-11-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for smelting rail steel with vanadium-bearing hot metal as raw materials |
| CN108060287A (en) * | 2017-12-20 | 2018-05-22 | 新疆昆玉钢铁有限公司 | Element recoverying and utilizing method is improved in the outer mix and convert technique of molten iron line |
| CN111378807A (en) * | 2018-12-31 | 2020-07-07 | 新疆八一钢铁股份有限公司 | Method for applying molten iron as alloy material to converter steelmaking |
| CN115404311A (en) * | 2022-09-23 | 2022-11-29 | 鞍钢股份有限公司 | Control method for producing high-carbon steel with low nitrogen content |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044127A (en) * | 1989-01-14 | 1990-07-25 | 抚顺钢厂 | The dephosphorization vanadium-main taining process of pig iron containing vanadium in electric arc furnace |
| CN1461813A (en) * | 2002-06-02 | 2003-12-17 | 承德新新钒钛股份有限公司 | Steelmaking method using molten iron as carburant |
-
2006
- 2006-06-23 CN CNB2006100212335A patent/CN100395364C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925616A (en) * | 2011-08-08 | 2013-02-13 | 攀钢集团有限公司 | Smelting method of vanadium-containing molten iron |
| CN102925616B (en) * | 2011-08-08 | 2014-10-01 | 攀钢集团有限公司 | Smelting method of vanadium-containing molten iron |
| CN102994871A (en) * | 2012-11-22 | 2013-03-27 | 河北钢铁股份有限公司承德分公司 | Method for smelting medium/high-carbon hard-wired steel by vanadium-titanium containing molten iron |
| CN102994871B (en) * | 2012-11-22 | 2014-07-02 | 河北钢铁股份有限公司承德分公司 | Method for smelting medium/high-carbon hard-wired steel by vanadium-titanium containing molten iron |
| CN105018670A (en) * | 2015-07-15 | 2015-11-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for smelting rail steel with vanadium-bearing hot metal as raw materials |
| CN108060287A (en) * | 2017-12-20 | 2018-05-22 | 新疆昆玉钢铁有限公司 | Element recoverying and utilizing method is improved in the outer mix and convert technique of molten iron line |
| CN111378807A (en) * | 2018-12-31 | 2020-07-07 | 新疆八一钢铁股份有限公司 | Method for applying molten iron as alloy material to converter steelmaking |
| CN115404311A (en) * | 2022-09-23 | 2022-11-29 | 鞍钢股份有限公司 | Control method for producing high-carbon steel with low nitrogen content |
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| Publication number | Publication date |
|---|---|
| CN100395364C (en) | 2008-06-18 |
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Granted publication date: 20080618 |