JP4961787B2 - 溶銑の脱硫方法 - Google Patents
溶銑の脱硫方法 Download PDFInfo
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- JP4961787B2 JP4961787B2 JP2006076243A JP2006076243A JP4961787B2 JP 4961787 B2 JP4961787 B2 JP 4961787B2 JP 2006076243 A JP2006076243 A JP 2006076243A JP 2006076243 A JP2006076243 A JP 2006076243A JP 4961787 B2 JP4961787 B2 JP 4961787B2
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- JP
- Japan
- Prior art keywords
- hot metal
- desulfurization
- lance
- desulfurizing agent
- agent
- 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.)
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- 238000006477 desulfuration reaction Methods 0.000 title claims description 98
- 230000023556 desulfurization Effects 0.000 title claims description 98
- 229910052751 metal Inorganic materials 0.000 title claims description 82
- 239000002184 metal Substances 0.000 title claims description 82
- 238000000034 method Methods 0.000 title claims description 25
- 239000003795 chemical substances by application Substances 0.000 claims description 100
- 230000003009 desulfurizing effect Effects 0.000 claims description 75
- 238000007664 blowing Methods 0.000 claims description 54
- 239000007789 gas Substances 0.000 claims description 27
- 238000003756 stirring Methods 0.000 claims description 23
- 239000012159 carrier gas Substances 0.000 claims description 15
- 238000010907 mechanical stirring Methods 0.000 claims description 12
- 239000011737 fluorine Substances 0.000 claims description 5
- 229910052731 fluorine Inorganic materials 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 28
- 239000000843 powder Substances 0.000 description 23
- 239000002245 particle Substances 0.000 description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 239000002893 slag Substances 0.000 description 8
- 229910004261 CaF 2 Inorganic materials 0.000 description 6
- 230000002776 aggregation Effects 0.000 description 6
- 238000004220 aggregation Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000007670 refining Methods 0.000 description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 4
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 230000012447 hatching Effects 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000009257 reactivity Effects 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 239000010436 fluorite Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 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 1
Images
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
2 溶銑鍋
3 溶銑
4 攪拌羽根
5 上吹きランス
6 ディスペンサー
7 脱硫剤
8 実験装置
9 電動機
10 坩堝容器
11 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、攪拌羽根によって攪拌されている溶銑の浴面上に、上吹きランスのランス高さが該上吹きランスのノズル径に対して下記の(1)式を満足するようにランス高さを調整した上吹きランスを介して、溶銑トン当たり1.6kg/min以下の脱硫剤の供給速度で、搬送用ガスとともに脱硫剤を上吹き添加して脱硫することを特徴とする、溶銑の脱硫方法。
h≦48.0×D …(1)
但し、(1)式において、hは、上吹きランスのランス高さ(m)、Dは、上吹きランスのノズル径(m)である。 - 前記上吹きランスから供給する搬送用ガスのランスノズル出口における流速が、該上吹きランスのランス高さ及びノズル径に対して、下記の(2)式を満足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。
Ug≧1.67×(h/D) …(2)
但し、(2)式において、Ugは、搬送用ガスのランスノズル出口における流速(m/sec)、hは、上吹きランスのランス高さ(m)、Dは、上吹きランスのノズル径(m)である。 - 前記脱硫剤は、実質的にフッ素を含有していないことを特徴とする、請求項1または請求項2に記載の溶銑の脱硫方法。
Priority Applications (1)
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JP2006076243A JP4961787B2 (ja) | 2006-03-20 | 2006-03-20 | 溶銑の脱硫方法 |
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JP2006076243A JP4961787B2 (ja) | 2006-03-20 | 2006-03-20 | 溶銑の脱硫方法 |
Publications (2)
Publication Number | Publication Date |
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JP2007247045A JP2007247045A (ja) | 2007-09-27 |
JP4961787B2 true JP4961787B2 (ja) | 2012-06-27 |
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JP2006076243A Active JP4961787B2 (ja) | 2006-03-20 | 2006-03-20 | 溶銑の脱硫方法 |
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JP (1) | JP4961787B2 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4984928B2 (ja) * | 2007-01-31 | 2012-07-25 | Jfeスチール株式会社 | 溶銑の脱硫方法 |
JP5433955B2 (ja) * | 2008-02-12 | 2014-03-05 | Jfeスチール株式会社 | 溶銑への脱硫剤供給装置及び脱硫剤供給方法 |
JP5617195B2 (ja) * | 2009-06-29 | 2014-11-05 | Jfeスチール株式会社 | 溶銑の脱硫方法 |
JP5418058B2 (ja) * | 2009-08-19 | 2014-02-19 | Jfeスチール株式会社 | 溶銑の脱硫方法 |
EP3327150B1 (en) * | 2015-07-24 | 2019-12-25 | JFE Steel Corporation | Desulfurizing agent, method for desulfurizing molten iron and method for producing molten iron |
JP7235238B2 (ja) * | 2019-03-06 | 2023-03-08 | 株式会社日向製錬所 | フェロニッケルの脱硫方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60162717A (ja) * | 1984-02-04 | 1985-08-24 | Nippon Kokan Kk <Nkk> | 溶銑の処理方法 |
JPH0788526B2 (ja) * | 1987-02-26 | 1995-09-27 | 新日本製鐵株式会社 | 鋳床溶銑予備処理設備 |
JP3533955B2 (ja) * | 1998-09-21 | 2004-06-07 | 住友金属工業株式会社 | スラグフォーミングの鎮静方法 |
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 |
JP4780910B2 (ja) * | 2003-11-14 | 2011-09-28 | Jfeスチール株式会社 | 溶銑の脱りん方法 |
JP4845078B2 (ja) * | 2003-12-16 | 2011-12-28 | Jfeスチール株式会社 | 溶銑の脱硫方法 |
JP2006028615A (ja) * | 2004-07-20 | 2006-02-02 | Sumitomo Metal Ind Ltd | 溶銑の脱硫方法及び機械式攪拌装置。 |
JP2006291334A (ja) * | 2005-04-14 | 2006-10-26 | Sumitomo Metal Ind Ltd | 溶銑予備処理ダストのリサイクル方法 |
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- 2006-03-20 JP JP2006076243A patent/JP4961787B2/ja active Active
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