JP2008063647A - 溶鋼の脱硫方法 - Google Patents
溶鋼の脱硫方法 Download PDFInfo
- Publication number
- JP2008063647A JP2008063647A JP2006245555A JP2006245555A JP2008063647A JP 2008063647 A JP2008063647 A JP 2008063647A JP 2006245555 A JP2006245555 A JP 2006245555A JP 2006245555 A JP2006245555 A JP 2006245555A JP 2008063647 A JP2008063647 A JP 2008063647A
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- JP
- Japan
- Prior art keywords
- molten steel
- desulfurization
- vacuum degassing
- steel
- target
- 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 183
- 239000010959 steel Substances 0.000 title claims abstract description 183
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000003009 desulfurizing effect Effects 0.000 title claims abstract description 10
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 90
- 230000023556 desulfurization Effects 0.000 claims abstract description 90
- 238000009849 vacuum degassing Methods 0.000 claims abstract description 63
- 230000004907 flux Effects 0.000 claims abstract description 51
- 239000002893 slag Substances 0.000 claims abstract description 30
- 238000007670 refining Methods 0.000 claims abstract description 19
- 238000007664 blowing Methods 0.000 claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 claims description 24
- 239000002184 metal Substances 0.000 claims description 24
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 16
- 229910004261 CaF 2 Inorganic materials 0.000 claims description 11
- 229910052717 sulfur Inorganic materials 0.000 abstract description 28
- 239000011593 sulfur Substances 0.000 abstract description 27
- 229910052782 aluminium Inorganic materials 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000005507 spraying Methods 0.000 abstract description 6
- 230000007423 decrease Effects 0.000 abstract description 3
- 229910000975 Carbon steel Inorganic materials 0.000 abstract 1
- 229910000805 Pig iron Inorganic materials 0.000 abstract 1
- 238000003723 Smelting Methods 0.000 abstract 1
- 238000010079 rubber tapping Methods 0.000 abstract 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 36
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 30
- 239000000292 calcium oxide Substances 0.000 description 18
- 235000012255 calcium oxide Nutrition 0.000 description 18
- 239000000395 magnesium oxide Substances 0.000 description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 10
- 238000009749 continuous casting Methods 0.000 description 10
- 238000007872 degassing Methods 0.000 description 9
- 239000007789 gas Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 6
- 239000012159 carrier gas Substances 0.000 description 6
- 238000005261 decarburization Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 229910004298 SiO 2 Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000009847 ladle furnace Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 3
- 239000010436 fluorite Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010405 reoxidation reaction Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000009628 steelmaking Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 239000002436 steel type Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910000655 Killed steel Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
【解決手段】 溶銑の脱炭精錬により得た溶鋼を転炉から取鍋に出鋼し、取鍋内溶鋼の湯面上に存在するスラグの還元処理を行った後、溶鋼をRH真空脱ガス装置にて二次精錬するに当たり、RH真空脱ガス装置にて溶鋼中にAlを投入して溶鋼を脱酸した後、RH真空脱ガス装置に設けた上吹きランスから、真空脱ガス槽内の溶鋼湯面に向けてCaOを48〜58mass%、Al2 O3 を42〜52mass%含有し、CaF2 を含有しない脱硫用プリメルトフラックスを吹き付けて溶鋼を脱硫する。その際に、脱硫用プリメルトフラックスを吹き付ける前に、真空脱ガス槽内の溶鋼にMgOを投入することが好ましい。
【選択図】 なし
Description
目標S濃度の上限が0.0024mass%である低炭アルミキルドの低硫鋼の精錬に本発明を適用した。当該低硫鋼を製造するに当たり、使用した溶銑は脱硫処理の施された溶銑であるが、溶銑のS含有量から判断して前記目標S濃度を安定して達成することは困難であったので、本発明を適用することとした。
本発明例1と同様に、目標S濃度の上限が0.0024mass%である低炭アルミキルドの低硫鋼の精錬に本発明を適用した。当該低硫鋼を製造するに当たり、使用した溶銑は脱硫処理の施された溶銑であるが、溶銑のS含有量から判断して前記目標S濃度を安定して達成することは困難であったので、本発明を適用することとした。
本発明例1,2と同様に、目標S濃度の上限が0.0024mass%である低炭アルミキルドの低硫鋼を製造するに当たり、使用した溶銑は脱硫処理の施された溶銑であるが、溶銑のS含有量から判断して前記目標S濃度を安定して達成することは困難であったので、従来のCaF2を含有する高価な脱硫用フラックスを使用してRH真空脱ガス装置で脱硫処理をすることとした。
Claims (2)
- 溶銑の脱炭精錬により得た溶鋼を転炉から取鍋に出鋼し、取鍋内溶鋼の浴面上に存在するスラグの還元処理を行った後、溶鋼をRH真空脱ガス装置にて二次精錬するに当たり、RH真空脱ガス装置にて溶鋼中にAlを投入して溶鋼を脱酸した後、RH真空脱ガス装置に設けた上吹きランスから、真空脱ガス槽内の溶鋼浴面に向けてCaOを48〜58mass%、Al2 O3 を42〜52mass%含有し、CaF2 を含有しない脱硫用プリメルトフラックスを吹き付けて溶鋼を脱硫することを特徴とする、溶鋼の脱硫方法。
- 前記上吹きランスから脱硫用プリメルトフラックスを吹き付ける前に、真空脱ガス槽内の溶鋼にMgOを投入することを特徴とする、請求項1に記載の溶鋼の脱硫方法。
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101993976A (zh) * | 2009-08-10 | 2011-03-30 | 鞍钢股份有限公司 | 一种铝镇静钢精炼脱氧脱硫合成渣 |
JP2011102407A (ja) * | 2009-11-10 | 2011-05-26 | Jfe Steel Corp | 溶鋼の脱硫方法 |
JP2012017479A (ja) * | 2010-07-06 | 2012-01-26 | Nippon Steel Corp | 溶鋼脱硫方法 |
CN102424895A (zh) * | 2011-12-27 | 2012-04-25 | 攀枝花钢城集团瑞钢工业有限公司 | 钢水处理用脱硫剂及其制备方法和使用方法 |
JP2012184501A (ja) * | 2011-02-14 | 2012-09-27 | Jfe Steel Corp | 溶鋼の脱硫方法 |
JP2016035094A (ja) * | 2014-08-04 | 2016-03-17 | 新日鐵住金株式会社 | 脱窒精錬方法 |
JP2017025373A (ja) * | 2015-07-22 | 2017-02-02 | Jfeスチール株式会社 | 溶鋼の脱硫方法 |
US10287644B2 (en) | 2011-08-12 | 2019-05-14 | Jfe Steel Corporation | Molten steel desulfurization method, molten steel secondary refining method, and molten steel manufacturing method |
EP3572534A4 (en) * | 2017-01-19 | 2019-11-27 | JFE Steel Corporation | DEHUMPING TREATMENT METHOD FOR MELTED STEEL AND DEGREASING AGENT |
CN115044743A (zh) * | 2022-05-26 | 2022-09-13 | 江阴兴澄特种钢铁有限公司 | 一种控制低碳含硫钢在vd炉脱硫率的方法 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01301814A (ja) * | 1988-05-30 | 1989-12-06 | Kawasaki Steel Corp | 高清浄度鋼の精練方法 |
JPH06207212A (ja) * | 1993-01-07 | 1994-07-26 | Kawasaki Steel Corp | S含有量の極めて少ない高清浄度極低炭素鋼の製造方法 |
JPH06306442A (ja) * | 1993-02-26 | 1994-11-01 | Nisshin Steel Co Ltd | 極低硫鋼の製造方法 |
JPH08176644A (ja) * | 1994-10-25 | 1996-07-09 | Sumitomo Metal Ind Ltd | キリング時間を短縮した低硫鋼の製造法 |
JPH09217110A (ja) * | 1996-02-14 | 1997-08-19 | Sumitomo Metal Ind Ltd | 超低硫鋼の溶製方法 |
JP2000109924A (ja) * | 1998-10-06 | 2000-04-18 | Sumitomo Metal Ind Ltd | 極低硫鋼の溶製方法 |
JP2001089135A (ja) * | 1999-09-27 | 2001-04-03 | Aichi Steel Works Ltd | 均質性に優れたカルシウムアルミネート |
JP2004263285A (ja) * | 2003-03-04 | 2004-09-24 | Nippon Steel Corp | 溶鋼の脱硫剤および脱硫方法およびカルシウムアルミネート源の製造方法 |
-
2006
- 2006-09-11 JP JP2006245555A patent/JP5343308B2/ja active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01301814A (ja) * | 1988-05-30 | 1989-12-06 | Kawasaki Steel Corp | 高清浄度鋼の精練方法 |
JPH06207212A (ja) * | 1993-01-07 | 1994-07-26 | Kawasaki Steel Corp | S含有量の極めて少ない高清浄度極低炭素鋼の製造方法 |
JPH06306442A (ja) * | 1993-02-26 | 1994-11-01 | Nisshin Steel Co Ltd | 極低硫鋼の製造方法 |
JPH08176644A (ja) * | 1994-10-25 | 1996-07-09 | Sumitomo Metal Ind Ltd | キリング時間を短縮した低硫鋼の製造法 |
JPH09217110A (ja) * | 1996-02-14 | 1997-08-19 | Sumitomo Metal Ind Ltd | 超低硫鋼の溶製方法 |
JP2000109924A (ja) * | 1998-10-06 | 2000-04-18 | Sumitomo Metal Ind Ltd | 極低硫鋼の溶製方法 |
JP2001089135A (ja) * | 1999-09-27 | 2001-04-03 | Aichi Steel Works Ltd | 均質性に優れたカルシウムアルミネート |
JP2004263285A (ja) * | 2003-03-04 | 2004-09-24 | Nippon Steel Corp | 溶鋼の脱硫剤および脱硫方法およびカルシウムアルミネート源の製造方法 |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101993976A (zh) * | 2009-08-10 | 2011-03-30 | 鞍钢股份有限公司 | 一种铝镇静钢精炼脱氧脱硫合成渣 |
JP2011102407A (ja) * | 2009-11-10 | 2011-05-26 | Jfe Steel Corp | 溶鋼の脱硫方法 |
JP2012017479A (ja) * | 2010-07-06 | 2012-01-26 | Nippon Steel Corp | 溶鋼脱硫方法 |
JP2012184501A (ja) * | 2011-02-14 | 2012-09-27 | Jfe Steel Corp | 溶鋼の脱硫方法 |
US10287644B2 (en) | 2011-08-12 | 2019-05-14 | Jfe Steel Corporation | Molten steel desulfurization method, molten steel secondary refining method, and molten steel manufacturing method |
US11035014B2 (en) | 2011-08-12 | 2021-06-15 | Jfe Steel Corporation | Molten steel desulfurization method, molten steel secondary refining method, and molten steel manufacturing method |
CN102424895A (zh) * | 2011-12-27 | 2012-04-25 | 攀枝花钢城集团瑞钢工业有限公司 | 钢水处理用脱硫剂及其制备方法和使用方法 |
JP2016035094A (ja) * | 2014-08-04 | 2016-03-17 | 新日鐵住金株式会社 | 脱窒精錬方法 |
JP2017025373A (ja) * | 2015-07-22 | 2017-02-02 | Jfeスチール株式会社 | 溶鋼の脱硫方法 |
EP3572534A4 (en) * | 2017-01-19 | 2019-11-27 | JFE Steel Corporation | DEHUMPING TREATMENT METHOD FOR MELTED STEEL AND DEGREASING AGENT |
CN115044743A (zh) * | 2022-05-26 | 2022-09-13 | 江阴兴澄特种钢铁有限公司 | 一种控制低碳含硫钢在vd炉脱硫率的方法 |
CN115044743B (zh) * | 2022-05-26 | 2023-09-15 | 江阴兴澄特种钢铁有限公司 | 一种控制低碳含硫钢在vd炉脱硫率的方法 |
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