JP5891826B2 - 溶鋼の脱硫方法 - Google Patents
溶鋼の脱硫方法 Download PDFInfo
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- JP5891826B2 JP5891826B2 JP2012024574A JP2012024574A JP5891826B2 JP 5891826 B2 JP5891826 B2 JP 5891826B2 JP 2012024574 A JP2012024574 A JP 2012024574A JP 2012024574 A JP2012024574 A JP 2012024574A JP 5891826 B2 JP5891826 B2 JP 5891826B2
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- molten steel
- flux
- desulfurization
- cao
- mainly composed
- Prior art date
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- 229910000831 Steel Inorganic materials 0.000 title claims description 143
- 239000010959 steel Substances 0.000 title claims description 143
- 238000006477 desulfuration reaction Methods 0.000 title claims description 101
- 230000023556 desulfurization Effects 0.000 title claims description 101
- 238000000034 method Methods 0.000 title claims description 22
- 230000004907 flux Effects 0.000 claims description 124
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 33
- 238000009849 vacuum degassing Methods 0.000 claims description 24
- 238000007664 blowing Methods 0.000 claims description 21
- 239000002245 particle Substances 0.000 claims description 15
- 230000003009 desulfurizing effect Effects 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 6
- 239000012159 carrier gas Substances 0.000 claims description 3
- 235000019000 fluorine Nutrition 0.000 claims 1
- 125000001153 fluoro group Chemical group F* 0.000 claims 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 151
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 86
- 239000000292 calcium oxide Substances 0.000 description 76
- 235000012255 calcium oxide Nutrition 0.000 description 76
- 239000002893 slag Substances 0.000 description 45
- 239000000395 magnesium oxide Substances 0.000 description 43
- 229910052717 sulfur Inorganic materials 0.000 description 39
- 239000011593 sulfur Substances 0.000 description 39
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 32
- 230000004888 barrier function Effects 0.000 description 27
- 238000002844 melting Methods 0.000 description 27
- 230000008018 melting Effects 0.000 description 26
- 238000006243 chemical reaction Methods 0.000 description 15
- 239000007789 gas Substances 0.000 description 12
- 238000007670 refining Methods 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 230000003628 erosive effect Effects 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 238000009749 continuous casting Methods 0.000 description 5
- 238000005261 decarburization Methods 0.000 description 5
- 239000010459 dolomite Substances 0.000 description 5
- 229910000514 dolomite Inorganic materials 0.000 description 5
- 239000011737 fluorine Substances 0.000 description 5
- 229910052731 fluorine Inorganic materials 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 238000010405 reoxidation reaction Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009847 ladle furnace Methods 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 230000001174 ascending effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 239000002436 steel type Substances 0.000 description 3
- 238000009628 steelmaking Methods 0.000 description 3
- 229910004261 CaF 2 Inorganic materials 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910000882 Ca alloy Inorganic materials 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
Images
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)
Description
[1]RH真空脱ガス装置の真空槽頂部に設けた上吹きランスから真空槽内の溶鋼湯面に向けて、CaO及びAl2O3を主成分とするプリメルトフラックスを脱硫用フラックスとして搬送用ガスとともに吹き付けて溶鋼を脱硫する、溶鋼の脱硫方法において、前記脱硫用フラックスの吹き付け前に、CaO及びMgOを主成分とするフラックス、または、CaOを主成分とするフラックスとMgOを主成分とするフラックスとを、CaO純分及びMgO純分の添加量をともに溶鋼トンあたり0.5kg以上2.5kg以下の範囲内として、真空槽内の溶鋼に添加することを特徴とする、溶鋼の脱硫方法。
[2]前記CaO及びAl2O3を主成分とするプリメルトフラックス、前記CaO及びMgOを主成分とするフラックス、前記CaOを主成分とするフラックス、並びに、前記MgOを主成分とするフラックスは、そのフッ素含有量が1.0質量%以下であることを特徴とする、上記[1]に記載の溶鋼の脱硫方法。
[3]前記CaO及びAl2O3を主成分とするプリメルトフラックスは、その90質量%以上が粒径0.10mm以下であることを特徴とする、上記[1]または上記[2]に記載の溶鋼の脱硫方法。
2 取鍋
3 溶鋼
4 スラグ
5 真空槽
6 上部槽
7 下部槽
8 上昇側浸漬管
9 下降側浸漬管
10 環流用ガス吹き込み管
11 ダクト
12 原料投入口
13 上吹きランス
Claims (2)
- RH真空脱ガス装置の真空槽頂部に設けた上吹きランスから真空槽内の溶鋼湯面に向けて、CaO及びAl2O3を主成分とするプリメルトフラックスを脱硫用フラックスとして搬送用ガスとともに吹き付けて溶鋼を脱硫する、溶鋼の脱硫方法において、
前記CaO及びAl 2 O 3 を主成分とするプリメルトフラックスは、その90質量%以上が粒径0.10mm以下であり、
前記脱硫用フラックスの吹き付け前に、CaO及びMgOを主成分とするフラックス、または、CaOを主成分とするフラックスとMgOを主成分とするフラックスとを、CaO純分及びMgO純分の添加量をともに溶鋼トンあたり0.5kg以上2.5kg以下の範囲内として、真空槽内の溶鋼に添加することを特徴とする、溶鋼の脱硫方法。 - 前記CaO及びAl2O3を主成分とするプリメルトフラックス、前記CaO及びMgOを主成分とするフラックス、前記CaOを主成分とするフラックス、並びに、前記MgOを主成分とするフラックスは、そのフッ素含有量が1.0質量%以下であ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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JP2012184501A JP2012184501A (ja) | 2012-09-27 |
JP5891826B2 true JP5891826B2 (ja) | 2016-03-23 |
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Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103484600B (zh) * | 2013-09-10 | 2015-05-27 | 首钢总公司 | 一种高硫钢水冶炼超低硫中厚板钢防止rh回硫工艺 |
JP6451363B2 (ja) * | 2015-02-04 | 2019-01-16 | 新日鐵住金株式会社 | 溶鋼の脱硫方法 |
JP6323688B2 (ja) * | 2015-07-22 | 2018-05-16 | Jfeスチール株式会社 | 溶鋼の脱硫方法 |
CN114250340B (zh) * | 2022-01-26 | 2023-07-25 | 北京首钢股份有限公司 | 一种rh脱硫方法 |
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JP3300014B2 (ja) * | 1992-03-27 | 2002-07-08 | 川崎製鉄株式会社 | 真空脱ガス処理による溶鋼の精錬方法 |
JP4062212B2 (ja) * | 2003-08-25 | 2008-03-19 | Jfeスチール株式会社 | Rh脱ガス装置による溶鋼の精錬方法 |
JP5343308B2 (ja) * | 2006-09-11 | 2013-11-13 | Jfeスチール株式会社 | 溶鋼の脱硫方法 |
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