JP5177170B2 - 溶銑の脱硫方法 - Google Patents
溶銑の脱硫方法 Download PDFInfo
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- JP5177170B2 JP5177170B2 JP2010107097A JP2010107097A JP5177170B2 JP 5177170 B2 JP5177170 B2 JP 5177170B2 JP 2010107097 A JP2010107097 A JP 2010107097A JP 2010107097 A JP2010107097 A JP 2010107097A JP 5177170 B2 JP5177170 B2 JP 5177170B2
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- desulfurization
- hot metal
- agent
- top blowing
- desulfurizing agent
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- 238000006477 desulfuration reaction Methods 0.000 title claims description 208
- 230000023556 desulfurization Effects 0.000 title claims description 208
- 229910052751 metal Inorganic materials 0.000 title claims description 169
- 239000002184 metal Substances 0.000 title claims description 169
- 238000000034 method Methods 0.000 title claims description 68
- 239000003795 chemical substances by application Substances 0.000 claims description 197
- 230000003009 desulfurizing effect Effects 0.000 claims description 120
- 238000007664 blowing Methods 0.000 claims description 87
- 239000007789 gas Substances 0.000 claims description 83
- 238000003756 stirring Methods 0.000 claims description 52
- 239000000126 substance Substances 0.000 claims description 31
- 239000012159 carrier gas Substances 0.000 claims description 28
- 238000012545 processing Methods 0.000 claims description 24
- 238000010907 mechanical stirring Methods 0.000 claims description 16
- 238000005507 spraying Methods 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000011737 fluorine Substances 0.000 claims description 9
- 229910052731 fluorine Inorganic materials 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000011261 inert gas Substances 0.000 claims description 5
- 230000001590 oxidative effect Effects 0.000 claims description 5
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 41
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 14
- 229910052782 aluminium Inorganic materials 0.000 description 12
- 239000010436 fluorite Substances 0.000 description 12
- 230000008569 process Effects 0.000 description 12
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 230000012447 hatching Effects 0.000 description 9
- 239000002245 particle Substances 0.000 description 9
- 229910004261 CaF 2 Inorganic materials 0.000 description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 8
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 8
- 239000000292 calcium oxide Substances 0.000 description 8
- 235000012255 calcium oxide Nutrition 0.000 description 8
- 238000005520 cutting process Methods 0.000 description 8
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
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- 239000011777 magnesium Substances 0.000 description 6
- 239000005997 Calcium carbide Substances 0.000 description 5
- 235000019738 Limestone Nutrition 0.000 description 5
- 230000002776 aggregation Effects 0.000 description 5
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- 230000007423 decrease Effects 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 239000006028 limestone Substances 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
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- 230000001737 promoting effect Effects 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 5
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 4
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- 229930195733 hydrocarbon Natural products 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
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- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000009257 reactivity Effects 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000010459 dolomite Substances 0.000 description 2
- 229910000514 dolomite Inorganic materials 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
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- 230000004907 flux Effects 0.000 description 2
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- 239000000203 mixture Substances 0.000 description 2
- 239000001294 propane Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- -1 For example Chemical compound 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Description
2 溶銑鍋
3 溶銑
4 攪拌羽根
5 上吹きランス
6 投入口
7 脱硫剤
7A 脱硫剤
8 脱酸源
8A 脱酸源
9 ガス発生物質
9A ガス発生物質
10,12,14,16,18,20 ホッパー
11,13,15,17,19,21 ロータリーフィーダー
Claims (10)
- 機械攪拌式脱硫装置を用いた溶銑の脱硫方法において、攪拌羽根によって攪拌されている溶銑の浴面上であって、溶銑を収容する処理容器の内径をD、攪拌羽根の直径をd、攪拌羽根の中心から脱硫剤の吹き付け位置までの水平距離をRとしたときに、水平距離(R)が、内径(D)及び直径(d)に対して下記の(2)式の関係を満足する範囲内となる位置に、脱硫剤を、上吹きランスを介して搬送用ガスと共に上吹き添加して脱硫処理を行うことを特徴とする、溶銑の脱硫方法。
d/3≦R≦d/2+1/3×(D-d) …(2)
但し、(2)式において、Dは溶銑を収容する処理容器の内径、dは攪拌羽根の直径、Rは攪拌羽根の中心から脱硫剤の吹き付け位置までの水平距離である。 - 前記脱硫剤の添加完了後、更に、前記上吹きランスから搬送用ガスを溶銑表面に向けて吹き付けて脱硫処理することを特徴とする、請求項1に記載の溶銑の脱硫方法。
- 溶銑の浴面に衝突する搬送用ガスの流速を10m/秒以上とすることを特徴とする、請求項1または請求項2に記載の溶銑の脱硫方法。
- 前記搬送用ガスは、実質的に酸素を含有してない、還元性ガス、不活性ガス、非酸化性ガスのうちの1種以上であることを特徴とする、請求項1ないし請求項3の何れか1つに記載の溶銑の脱硫方法。
- 前記脱硫剤の上吹き添加よりも以前、または脱硫剤の上吹き添加と同時に、若しくは脱硫剤の上吹き添加完了後に、前記上吹きランスまたは別のランスから、脱酸源を搬送用ガスと共に溶銑表面に向けて上吹き添加することを特徴とする、請求項1ないし請求項4の何れか1つに記載の溶銑の脱硫方法。
- 前記脱硫剤の上吹き添加よりも以前、または脱硫剤の上吹き添加と同時に、若しくは脱硫剤の上吹き添加完了後に、溶銑を収容する処理容器内に脱酸源を添加することを特徴とする、請求項1ないし請求項4の何れか1つに記載の溶銑の脱硫方法。
- 前記脱酸源は、金属Al、金属Si、金属Mgのうちの1種以上を含む物質であることを特徴とする、請求項5または請求項6に記載の溶銑の脱硫方法。
- 前記脱硫剤の上吹き添加よりも以前、または脱硫剤の上吹き添加と同時に、若しくは脱硫剤の上吹き添加完了後に、前記上吹きランスまたは別のランスから、ガスを発生する物質を搬送用ガスと共に溶銑表面に向けて上吹き添加することを特徴とする、請求項1ないし請求項7の何れか1つに記載の溶銑の脱硫方法。
- 前記脱硫剤の上吹き添加よりも以前、または脱硫剤の上吹き添加と同時に、若しくは脱硫剤の上吹き添加完了後に、溶銑を収容する処理容器内にガスを発生する物質を添加することを特徴とする、請求項1ないし請求項7の何れか1つに記載の溶銑の脱硫方法。
- 前記脱硫剤は、CaOを主体とし、実質的にフッ素を含有しない物質であることを特徴とする、請求項1ないし請求項9の何れか1つに記載の溶銑の脱硫方法。
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JP2003417385A Division JP4845078B2 (ja) | 2003-12-16 | 2003-12-16 | 溶銑の脱硫方法 |
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JP2010163697A JP2010163697A (ja) | 2010-07-29 |
JP2010163697A5 JP2010163697A5 (ja) | 2011-12-08 |
JP5177170B2 true JP5177170B2 (ja) | 2013-04-03 |
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Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103562415B (zh) | 2011-08-12 | 2015-05-06 | 杰富意钢铁株式会社 | 钢水的脱硫方法、钢水的二次精炼方法及钢水的制造方法 |
JP5177263B2 (ja) | 2011-08-12 | 2013-04-03 | Jfeスチール株式会社 | 溶銑の脱硫方法 |
WO2017018263A1 (ja) * | 2015-07-24 | 2017-02-02 | Jfeスチール株式会社 | 脱硫剤、溶銑脱硫方法および溶銑の製造方法 |
JP6369516B2 (ja) * | 2015-10-05 | 2018-08-08 | Jfeスチール株式会社 | 機械攪拌式溶銑脱硫方法 |
JP6648711B2 (ja) * | 2017-02-07 | 2020-02-14 | Jfeスチール株式会社 | 溶銑の脱硫方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS59157209A (ja) * | 1983-02-25 | 1984-09-06 | Sumitomo Metal Ind Ltd | 溶鉄の予備処理方法 |
JP3608439B2 (ja) * | 1999-07-05 | 2005-01-12 | Jfeスチール株式会社 | 溶融鉄合金の脱硫方法 |
JP2003119509A (ja) * | 2001-10-11 | 2003-04-23 | Nippon Steel Corp | 溶銑予備処理方法及びインペラー装置 |
JP3978355B2 (ja) * | 2002-03-13 | 2007-09-19 | Jfeスチール株式会社 | 溶銑の脱硫剤および脱硫方法 |
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