JP5609081B2 - 溶銑の脱硫方法 - Google Patents
溶銑の脱硫方法 Download PDFInfo
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- JP5609081B2 JP5609081B2 JP2009273323A JP2009273323A JP5609081B2 JP 5609081 B2 JP5609081 B2 JP 5609081B2 JP 2009273323 A JP2009273323 A JP 2009273323A JP 2009273323 A JP2009273323 A JP 2009273323A JP 5609081 B2 JP5609081 B2 JP 5609081B2
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- JP
- Japan
- Prior art keywords
- hot metal
- gas
- desulfurization
- desulfurizing agent
- blowing lance
- 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 100
- 230000023556 desulfurization Effects 0.000 title claims description 100
- 229910052751 metal Inorganic materials 0.000 title claims description 91
- 239000002184 metal Substances 0.000 title claims description 91
- 238000000034 method Methods 0.000 title claims description 31
- 239000007789 gas Substances 0.000 claims description 82
- 239000003795 chemical substances by application Substances 0.000 claims description 71
- 238000007664 blowing Methods 0.000 claims description 64
- 230000003009 desulfurizing effect Effects 0.000 claims description 51
- 238000010907 mechanical stirring Methods 0.000 claims description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 239000004215 Carbon black (E152) Substances 0.000 claims description 11
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 11
- 229930195733 hydrocarbon Natural products 0.000 claims description 11
- 150000002430 hydrocarbons Chemical class 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 239000012159 carrier gas Substances 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 9
- 229910001873 dinitrogen Inorganic materials 0.000 description 9
- 239000000428 dust Substances 0.000 description 9
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 8
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 7
- 239000000292 calcium oxide Substances 0.000 description 7
- 239000011261 inert gas Substances 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 230000001590 oxidative effect Effects 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000007670 refining Methods 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 239000001294 propane Substances 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 230000009257 reactivity Effects 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect 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
- 238000002485 combustion reaction Methods 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
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 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
[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。(1)式の反応を進めて脱硫を促進させるには、還元雰囲気にして溶鉄中の酸素ポテンシャルを低下させることが有効であることが分かる。
0≦A≦(2/3)×D…(2)
0≦A≦(2/3)×D…(2)
但し、(2)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 (1)
- 機械攪拌式脱硫装置を用いた溶銑の脱硫方法において、インペラーによって攪拌されている溶銑の浴面上に、多重管構造である上吹きランスの先端部から搬送用ガスとともに脱硫剤を上吹き添加するとともに、脱硫剤を上吹きする部位の外周に設けた前記上吹きランス先端部の部位から、炭化水素ガスまたは水素ガスを溶銑浴面に向けて同時に吹き付けて脱硫処理を行うに際し、
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(2)式の関係を満足する範囲内であって、前記溶銑浴表面近傍の溶銑の鉛直方向の流れが下向きとなる位置であることを特徴とする、溶銑の脱硫方法。
0≦A≦(2/3)×D…(2)
Priority Applications (1)
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---|---|---|---|
JP2009273323A JP5609081B2 (ja) | 2009-12-01 | 2009-12-01 | 溶銑の脱硫方法 |
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JP2009273323A JP5609081B2 (ja) | 2009-12-01 | 2009-12-01 | 溶銑の脱硫方法 |
Publications (2)
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JP2011117015A JP2011117015A (ja) | 2011-06-16 |
JP5609081B2 true JP5609081B2 (ja) | 2014-10-22 |
Family
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JP2009273323A Active JP5609081B2 (ja) | 2009-12-01 | 2009-12-01 | 溶銑の脱硫方法 |
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JP (1) | JP5609081B2 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016180133A (ja) * | 2015-03-23 | 2016-10-13 | 株式会社神戸製鋼所 | 溶銑の脱硫方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54159321A (en) * | 1978-06-07 | 1979-12-17 | Kawasaki Steel Co | Desulfurization of molten iron |
LU87602A1 (fr) * | 1989-10-05 | 1991-05-07 | Glaverbel | Procede de formation d'une masse refractaire et lance de projection d'un melange de particules |
JPH07216430A (ja) * | 1994-02-02 | 1995-08-15 | Nippon Steel Corp | 溶鋼製造法および溶融金属精錬用上吹きランス |
JP4019117B2 (ja) * | 2001-09-28 | 2007-12-12 | 大陽日酸株式会社 | 粉体吹込み装置および精錬方法 |
JP4845078B2 (ja) * | 2003-12-16 | 2011-12-28 | Jfeスチール株式会社 | 溶銑の脱硫方法 |
-
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- 2009-12-01 JP JP2009273323A patent/JP5609081B2/ja active Active
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