JP4305127B2 - 溶銑の脱燐処理方法 - Google Patents
溶銑の脱燐処理方法 Download PDFInfo
- Publication number
- JP4305127B2 JP4305127B2 JP2003364876A JP2003364876A JP4305127B2 JP 4305127 B2 JP4305127 B2 JP 4305127B2 JP 2003364876 A JP2003364876 A JP 2003364876A JP 2003364876 A JP2003364876 A JP 2003364876A JP 4305127 B2 JP4305127 B2 JP 4305127B2
- Authority
- JP
- Japan
- Prior art keywords
- dephosphorization
- hot metal
- cao
- slag
- oxygen gas
- 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.)
- Expired - Lifetime
Links
- 239000002184 metal Substances 0.000 title claims description 99
- 229910052751 metal Inorganic materials 0.000 title claims description 99
- 238000000034 method Methods 0.000 title claims description 32
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 34
- 229910001882 dioxygen Inorganic materials 0.000 claims description 34
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 33
- 229910052698 phosphorus Inorganic materials 0.000 claims description 33
- 239000011574 phosphorus Substances 0.000 claims description 33
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 27
- 229910052710 silicon Inorganic materials 0.000 claims description 27
- 239000010703 silicon Substances 0.000 claims description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 26
- 238000007664 blowing Methods 0.000 claims description 26
- 239000003795 chemical substances by application Substances 0.000 claims description 25
- 239000011737 fluorine Substances 0.000 claims description 22
- 229910052731 fluorine Inorganic materials 0.000 claims description 22
- 239000002904 solvent Substances 0.000 claims description 18
- 229910052742 iron Inorganic materials 0.000 claims description 13
- 238000005507 spraying Methods 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 146
- 239000000292 calcium oxide Substances 0.000 description 73
- 235000012255 calcium oxide Nutrition 0.000 description 73
- 239000002893 slag Substances 0.000 description 39
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 21
- 239000007789 gas Substances 0.000 description 17
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 14
- 239000010436 fluorite Substances 0.000 description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 229910001873 dinitrogen Inorganic materials 0.000 description 10
- 238000007670 refining Methods 0.000 description 10
- 229910004261 CaF 2 Inorganic materials 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 9
- 229910004298 SiO 2 Inorganic materials 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 238000003756 stirring Methods 0.000 description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- 230000012447 hatching Effects 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 238000010828 elution Methods 0.000 description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 4
- 239000002519 antifouling agent Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000012159 carrier gas Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000003672 processing method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910052587 fluorapatite Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000006209 dephosphorylation reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229940077441 fluorapatite Drugs 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 description 1
- 229910001392 phosphorus oxide Inorganic materials 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- VSAISIQCTGDGPU-UHFFFAOYSA-N tetraphosphorus hexaoxide Chemical compound O1P(O2)OP3OP1OP2O3 VSAISIQCTGDGPU-UHFFFAOYSA-N 0.000 description 1
Images
Description
2 炉本体
3 上吹きランス
4 鉄皮
5 耐火物
6 出湯口
7 底吹き羽口
8 ガス導入管
9 酸素ガス配管
10 窒素ガス配管
11 ディスペンサー
12 流量調整弁
13 流量調整弁
14 流量調整弁
15 溶銑
16 スラグ
17 脱燐用造滓剤
18 撹拌用ガス
19 造滓剤移送配管
Claims (3)
- 溶銑の浴面に酸素ガスを吹き付けて供給すると共に、溶銑浴面の酸素ガスの吹き付け面に向けてCaOを主体とする脱燐用媒溶剤を吹き付けて供給することにより溶銑を脱燐処理する方法であって、脱燐処理前の溶銑中の燐濃度及び珪素濃度に応じて、前記CaOを主体とする脱燐用媒溶剤中のCaO純分の平均添加速度(FCaO )が下記(3)式の範囲内となるように、当該脱燐用媒溶剤の供給量を調整することを特徴とする、溶銑の脱燐処理方法。
0.25×ln([P])+0.8<FCaO−0.4×[Si]<0.5×ln([P])+1.6 …(3)
但し、(3)式において、FCaO は、CaOを主体とする脱燐用媒溶剤中のCaO純分の平均添加速度(kg/min・溶銑t)、[Si]は、脱燐処理前の溶銑中の珪素濃度(質量%)、[P]は、脱燐処理前の溶銑中の燐濃度(質量%)である。 - 前記溶銑の脱燐処理前の珪素含有量が0.1質量%以下であることを特徴とする、請求項1に記載の溶銑の脱燐処理方法。
- 前記脱燐用造滓剤として、実質的に弗素を含有しない物質を使用することを特徴とする、請求項1又は請求項2に記載の溶銑の脱燐方法。
Priority Applications (1)
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JP2003364876A JP4305127B2 (ja) | 2003-10-24 | 2003-10-24 | 溶銑の脱燐処理方法 |
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JP2003364876A JP4305127B2 (ja) | 2003-10-24 | 2003-10-24 | 溶銑の脱燐処理方法 |
Publications (2)
Publication Number | Publication Date |
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JP2005126784A JP2005126784A (ja) | 2005-05-19 |
JP4305127B2 true JP4305127B2 (ja) | 2009-07-29 |
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JP2003364876A Expired - Lifetime JP4305127B2 (ja) | 2003-10-24 | 2003-10-24 | 溶銑の脱燐処理方法 |
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Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5211786B2 (ja) * | 2008-03-21 | 2013-06-12 | 新日鐵住金株式会社 | 吹錬制御方法および該吹錬制御方法を用いた低りん溶銑の製造方法 |
JP5386972B2 (ja) * | 2008-12-24 | 2014-01-15 | 新日鐵住金株式会社 | 溶銑の脱珪脱りん方法 |
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2003
- 2003-10-24 JP JP2003364876A patent/JP4305127B2/ja not_active Expired - Lifetime
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