JP5272378B2 - 溶銑の脱燐処理方法 - Google Patents
溶銑の脱燐処理方法 Download PDFInfo
- Publication number
- JP5272378B2 JP5272378B2 JP2007286843A JP2007286843A JP5272378B2 JP 5272378 B2 JP5272378 B2 JP 5272378B2 JP 2007286843 A JP2007286843 A JP 2007286843A JP 2007286843 A JP2007286843 A JP 2007286843A JP 5272378 B2 JP5272378 B2 JP 5272378B2
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- JP
- Japan
- Prior art keywords
- dephosphorization
- slag
- cao
- hot metal
- mass
- 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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- 229910052751 metal Inorganic materials 0.000 title claims description 78
- 239000002184 metal Substances 0.000 title claims description 78
- 238000000034 method Methods 0.000 title claims description 34
- 239000002893 slag Substances 0.000 claims description 143
- 239000003795 chemical substances by application Substances 0.000 claims description 74
- 238000007670 refining Methods 0.000 claims description 64
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 30
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 29
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 23
- 229910001882 dioxygen Inorganic materials 0.000 claims description 23
- 230000008569 process Effects 0.000 claims description 22
- 239000000843 powder Substances 0.000 claims description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- 239000010703 silicon Substances 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 2
- 230000000977 initiatory effect Effects 0.000 claims 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 221
- 235000012255 calcium oxide Nutrition 0.000 description 111
- 239000000292 calcium oxide Substances 0.000 description 111
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 25
- 238000007664 blowing Methods 0.000 description 24
- 238000004898 kneading Methods 0.000 description 24
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 20
- 239000001301 oxygen Substances 0.000 description 20
- 229910052760 oxygen Inorganic materials 0.000 description 20
- 238000006243 chemical reaction Methods 0.000 description 18
- 238000002347 injection Methods 0.000 description 15
- 239000007924 injection Substances 0.000 description 15
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 13
- 239000011574 phosphorus Substances 0.000 description 13
- 229910052698 phosphorus Inorganic materials 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 12
- 229910052742 iron Inorganic materials 0.000 description 12
- 239000012159 carrier gas Substances 0.000 description 9
- 238000005261 decarburization Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000000739 chaotic effect Effects 0.000 description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 4
- 235000011941 Tilia x europaea Nutrition 0.000 description 4
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 4
- 239000010436 fluorite Substances 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 4
- 239000011261 inert gas Substances 0.000 description 4
- 239000004571 lime Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000012447 hatching Effects 0.000 description 2
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 229910001392 phosphorus oxide Inorganic materials 0.000 description 2
- LFGREXWGYUGZLY-UHFFFAOYSA-N phosphoryl Chemical compound [P]=O LFGREXWGYUGZLY-UHFFFAOYSA-N 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- VSAISIQCTGDGPU-UHFFFAOYSA-N tetraphosphorus hexaoxide Chemical compound O1P(O2)OP3OP1OP2O3 VSAISIQCTGDGPU-UHFFFAOYSA-N 0.000 description 2
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- YWEUIGNSBFLMFL-UHFFFAOYSA-N diphosphonate Chemical compound O=P(=O)OP(=O)=O YWEUIGNSBFLMFL-UHFFFAOYSA-N 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- 239000006148 magnetic separator Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- -1 resource saving Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000007787 solid 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
- 230000001629 suppression Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
2 混銑車炉体
3 上吹きランス
4 インジェクションランス
5 溶銑
Claims (1)
- 混銑車内に収容された、珪素含有量が0.2質量%以上の溶銑に酸素ガスまたは酸化鉄を脱燐剤として供給するとともに、前記溶銑の浴面下に転炉スラグの配合比率が90質量%を越えるCaO系脱燐精錬剤を吹き込んで溶銑を脱燐処理する溶銑の脱燐処理方法であって、前記CaO系脱燐精錬剤を、脱燐処理前半の脱珪期には溶銑に吹き込まず、脱珪期後の脱燐期に移行した以降に溶銑に吹き込み、前記CaO系脱燐精錬剤に配合する転炉スラグとして、粒径44μm以下の粒子の比率が30質量%以上である転炉スラグ粉を使用し、生成スラグの塩基度(質量%CaO/質量%SiO2 )が1.5以上で3.0未満となるように、前記CaO系脱燐精錬剤の添加量を調整し、且つ、脱燐処理開始前または脱燐処理開始直後に前記混銑車を適当な角度に傾転し、混銑車を傾転したまま脱燐処理を行い、生成するスラグの一部を混銑車から排出しながら脱燐処理することを特徴とする、溶銑の脱燐処理方法。
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JP2007286843A JP5272378B2 (ja) | 2007-11-05 | 2007-11-05 | 溶銑の脱燐処理方法 |
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JP2007286843A JP5272378B2 (ja) | 2007-11-05 | 2007-11-05 | 溶銑の脱燐処理方法 |
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JP2009114489A JP2009114489A (ja) | 2009-05-28 |
JP5272378B2 true JP5272378B2 (ja) | 2013-08-28 |
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Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5483520B2 (ja) * | 2008-08-08 | 2014-05-07 | 株式会社神戸製鋼所 | 溶銑の脱りん処理方法 |
JP5655345B2 (ja) * | 2010-03-31 | 2015-01-21 | Jfeスチール株式会社 | 溶銑の脱燐方法 |
CN103880092B (zh) * | 2014-03-07 | 2015-07-15 | 西安建筑科技大学 | 一种钢铁厂酸洗废液再生副产品氧化铁粉脱磷的方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3704853B2 (ja) * | 1996-12-27 | 2005-10-12 | Jfeスチール株式会社 | 溶銑の予備精錬方法 |
JP3697960B2 (ja) * | 1999-07-30 | 2005-09-21 | Jfeスチール株式会社 | 溶銑の予備処理方法 |
JP2001107124A (ja) * | 1999-10-12 | 2001-04-17 | Nippon Steel Corp | 溶銑の脱燐方法 |
JP2001164308A (ja) * | 1999-12-08 | 2001-06-19 | Nippon Steel Corp | 溶銑の脱燐剤および脱燐方法 |
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 |
JP5031977B2 (ja) * | 2004-05-31 | 2012-09-26 | Jfeスチール株式会社 | 溶銑の脱燐処理方法 |
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- 2007-11-05 JP JP2007286843A patent/JP5272378B2/ja active Active
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