JP5195737B2 - 溶銑の脱硫方法 - Google Patents
溶銑の脱硫方法 Download PDFInfo
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- JP5195737B2 JP5195737B2 JP2009291780A JP2009291780A JP5195737B2 JP 5195737 B2 JP5195737 B2 JP 5195737B2 JP 2009291780 A JP2009291780 A JP 2009291780A JP 2009291780 A JP2009291780 A JP 2009291780A JP 5195737 B2 JP5195737 B2 JP 5195737B2
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- hot metal
- desulfurization
- metal
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- alumina
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- 229910052751 metal Inorganic materials 0.000 title claims description 168
- 239000002184 metal Substances 0.000 title claims description 168
- 238000006477 desulfuration reaction Methods 0.000 title claims description 135
- 230000023556 desulfurization Effects 0.000 title claims description 135
- 238000000034 method Methods 0.000 title claims description 25
- 239000003795 chemical substances by application Substances 0.000 claims description 63
- 230000003009 desulfurizing effect Effects 0.000 claims description 32
- 238000007664 blowing Methods 0.000 claims description 26
- 238000010907 mechanical stirring Methods 0.000 claims description 23
- 239000000843 powder Substances 0.000 claims description 20
- 238000012545 processing Methods 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 8
- 239000012159 carrier gas Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 description 56
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 40
- 239000000292 calcium oxide Substances 0.000 description 40
- 238000002156 mixing Methods 0.000 description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 239000007789 gas Substances 0.000 description 11
- 230000012447 hatching Effects 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 239000002893 slag Substances 0.000 description 9
- 150000002222 fluorine compounds Chemical class 0.000 description 8
- 230000002776 aggregation Effects 0.000 description 6
- 238000004220 aggregation Methods 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 6
- 239000010436 fluorite Substances 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 5
- 239000000428 dust Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910004261 CaF 2 Inorganic materials 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000005997 Calcium carbide Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- -1 fluorite Chemical class 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 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 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 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
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013361 beverage Nutrition 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
- JGIATAMCQXIDNZ-UHFFFAOYSA-N calcium sulfide Chemical compound [Ca]=S JGIATAMCQXIDNZ-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
[S]+(CaO)=(CaS)+[O] …(1)
(1)式において、[S]は溶鉄中の硫黄、(CaO)はスラグ中の酸化カルシウム、(CaS)はスラグ中の硫化カルシウム、[O]は溶鉄中の酸素を示す。
溶銑温度:1250℃超え1340℃未満の場合 X(質量%)=295-0.22×T …(3)
溶銑温度:1340℃以上の場合 X(質量%)=0.2 …(4)
但し、(3)式において、Tは脱硫処理前の溶銑温度(℃)である。
0≦A≦(2/3)×D …(5)
溶銑温度:1250℃超え1340℃未満の場合 X(質量%)=295-0.22×T …(3)
溶銑温度:1340℃以上の場合 X(質量%)=0.2 …(4)
但し、(3)式において、Tは脱硫処理前の溶銑温度(℃)である。
0≦A≦(2/3)×D …(5)
但し、(5)式において、Aは、処理容器の中心から上吹きランスの中心位置までの水平距離(m)、Dは、処理容器の内壁半径(m)である。
2 溶銑鍋
3 溶銑
4 インペラー
5 上吹きランス
6 脱硫剤
7 ディスペンサー
8 切り出し装置
9 集塵フード
10 坩堝容器
11 上吹きランス
12 インペラー
13 電動機
14 高周波加熱コイル
Claims (3)
- 機械攪拌式脱硫装置を用いた溶銑の脱硫方法において、脱硫処理前の溶銑温度が1150〜1400℃の範囲内の溶銑を脱硫処理する際に、脱硫処理前に脱硫処理対象の溶銑の温度を測定し、CaO粉体に対して、金属Alを10〜50質量%含有するアルミナ−金属Al混合体を脱硫処理対象の前記溶銑の脱硫処理前温度に応じて下記の(2)式、(3)式及び(4)式で求められるX質量%以上、X+15質量%以下の範囲で添加した脱硫剤を、攪拌羽根によって攪拌されている溶銑の浴面に添加し、溶銑を脱硫処理することを特徴とする、溶銑の脱硫方法。
溶銑温度:1250℃以下の場合 X(質量%)=20 …(2)
溶銑温度:1250℃超え1340℃未満の場合 X(質量%)=295-0.22×T …(3)
溶銑温度:1340℃以上の場合 X(質量%)=0.2 …(4)
但し、(3)式において、Tは脱硫処理前の溶銑温度(℃)である。 - 前記脱硫剤を、上吹きランスを介して搬送用ガスとともに溶銑の浴面に上吹き添加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。
- 前記上吹きランスは鉛直方向下方を向いて配置され、溶銑を収容する処理容器の内壁半径をD(m)、処理容器の中心から前記上吹きランス中心までの水平距離をA(m)としたときに、該水平距離(A)が、前記内壁半径(D)に対して下記の(5)式の関係を満足する範囲内であることを特徴とする、請求項2に記載の溶銑の脱硫方法。
0<A≦(2/3)×D …(5)
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JP5195737B2 true JP5195737B2 (ja) | 2013-05-15 |
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KR20180016593A (ko) | 2015-07-24 | 2018-02-14 | 제이에프이 스틸 가부시키가이샤 | 탈황제, 용선 탈황 방법 및 용선의 제조 방법 |
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JP6257362B2 (ja) * | 2014-02-06 | 2018-01-10 | 株式会社神戸製鋼所 | 鉄鋼精錬用副資材 |
JP6223247B2 (ja) * | 2014-03-18 | 2017-11-01 | 株式会社神戸製鋼所 | 溶銑脱硫方法 |
JP2016020539A (ja) * | 2014-06-16 | 2016-02-04 | 株式会社神戸製鋼所 | 溶銑脱硫方法 |
JP2016186124A (ja) * | 2015-03-27 | 2016-10-27 | 株式会社神戸製鋼所 | 溶銑の脱硫方法 |
CN113481343A (zh) * | 2021-07-05 | 2021-10-08 | 马鞍山钢铁股份有限公司 | 一种高效kr脱硫剂及其制备方法和使用方法 |
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JP4150194B2 (ja) * | 2002-03-05 | 2008-09-17 | 新日本製鐵株式会社 | 溶銑の機械攪拌による脱硫方法 |
JP4845078B2 (ja) * | 2003-12-16 | 2011-12-28 | Jfeスチール株式会社 | 溶銑の脱硫方法 |
JP4635672B2 (ja) * | 2005-03-24 | 2011-02-23 | Jfeスチール株式会社 | 溶融金属の精錬方法 |
JP5045031B2 (ja) * | 2006-08-25 | 2012-10-10 | Jfeスチール株式会社 | 溶銑の脱硫剤及び脱硫処理方法 |
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KR20180016593A (ko) | 2015-07-24 | 2018-02-14 | 제이에프이 스틸 가부시키가이샤 | 탈황제, 용선 탈황 방법 및 용선의 제조 방법 |
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