JP5292752B2 - 酸素ガス吹き込みランス及び溶銑の脱珪処理方法 - Google Patents
酸素ガス吹き込みランス及び溶銑の脱珪処理方法 Download PDFInfo
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- JP5292752B2 JP5292752B2 JP2007249369A JP2007249369A JP5292752B2 JP 5292752 B2 JP5292752 B2 JP 5292752B2 JP 2007249369 A JP2007249369 A JP 2007249369A JP 2007249369 A JP2007249369 A JP 2007249369A JP 5292752 B2 JP5292752 B2 JP 5292752B2
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- oxygen gas
- refractory
- blowing lance
- hot metal
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- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 title claims abstract description 111
- 229910001882 dioxygen Inorganic materials 0.000 title claims abstract description 111
- 238000007664 blowing Methods 0.000 title claims abstract description 100
- 239000002184 metal Substances 0.000 title claims abstract description 72
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000007789 gas Substances 0.000 claims abstract description 31
- 239000011810 insulating material Substances 0.000 claims abstract description 30
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 24
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 24
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 24
- 239000010703 silicon Substances 0.000 claims abstract description 7
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 230000001590 oxidative effect Effects 0.000 claims abstract description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 54
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 24
- 239000000919 ceramic Substances 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 14
- 229910052742 iron Inorganic materials 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- 239000011247 coating layer Substances 0.000 description 40
- 239000010410 layer Substances 0.000 description 29
- 229910052799 carbon Inorganic materials 0.000 description 13
- 238000012360 testing method Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 11
- 239000002356 single layer Substances 0.000 description 11
- 239000002253 acid Substances 0.000 description 10
- 238000007670 refining Methods 0.000 description 10
- 238000004898 kneading Methods 0.000 description 9
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000004901 spalling Methods 0.000 description 8
- 239000011819 refractory material Substances 0.000 description 7
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000007654 immersion Methods 0.000 description 6
- 239000002893 slag Substances 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 230000001788 irregular Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 239000001294 propane Substances 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
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 230000000739 chaotic effect Effects 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000011823 monolithic refractory Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 235000013980 iron oxide Nutrition 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Images
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- Treatment Of Steel In Its Molten State (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
1C ランス開口部中心
2 内管
3 外管
4 耐火物被覆層
4A 先端部耐火物被覆層
4B 胴部耐火物被覆層
5 混銑車
6 溶銑
7 断熱材質層
Claims (3)
- 溶融金属中に酸素ガスを吹き込むための酸素ガス吹き込みランスであって、内管及び外管からなる2重管構造であり、内管からは酸素ガスが吹き込まれ、内管と外管との間隙からは炭化水素系ガスが吹き込まれ、外管の周囲には厚みが0.5〜5mmのSiO 2 系のセラミックシートからなる断熱材質層が設けられ、該断熱材質層の外側には、MgOを10〜50質量%、Cを1〜10質量%含有するAl 2 O 3 −MgO−C系耐火物が被覆されていることを特徴とする酸素ガス吹き込みランス。
- 前記Al2 O3 −MgO−C系耐火物は、前記吹き込みランスの先端部に被覆され、この先端部に続く前記吹き込みランスの胴部には、前記断熱材質層の外周にSiO2を10〜40質量%含有するAl2 O3 −SiO2 系耐火物が被覆されていることを特徴とする、請求項1に記載の酸素ガス吹き込みランス。
- 請求項1または請求項2に記載された酸素ガス吹き込みランスを溶銑中に浸漬させ、該吹き込みランスの内管から溶銑中に酸素ガスを吹き込むとともに、内管と外管との間隙から炭化水素系ガスを吹き込んで溶銑中の珪素を酸化除去することを特徴とする、溶銑の脱珪処理方法。
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JP2009079260A JP2009079260A (ja) | 2009-04-16 |
JP5292752B2 true JP5292752B2 (ja) | 2013-09-18 |
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JPS5837941Y2 (ja) * | 1979-12-17 | 1983-08-27 | 住友金属工業株式会社 | 炉外精錬用上吹きランス |
JPH04124213A (ja) * | 1990-09-14 | 1992-04-24 | Ube Ind Ltd | ランス管 |
JP3800734B2 (ja) * | 1997-06-23 | 2006-07-26 | Jfeスチール株式会社 | 金属精錬炉用ガス吹込みランス |
JP3858413B2 (ja) * | 1998-01-26 | 2006-12-13 | Jfeスチール株式会社 | 粉体吹き込み用ランスの使用方法 |
JP2000038610A (ja) * | 1998-07-22 | 2000-02-08 | Toshiba Ceramics Co Ltd | 浸漬ランスとその製造方法 |
JP2002115011A (ja) * | 2000-10-11 | 2002-04-19 | Sumitomo Metal Ind Ltd | 精錬炉の羽口ライニング構造 |
JP2006143517A (ja) * | 2004-11-18 | 2006-06-08 | Shinagawa Refract Co Ltd | 炭素含有不焼成耐火物及びその製造方法 |
CN101389774B (zh) * | 2006-02-27 | 2011-05-11 | 杰富意钢铁株式会社 | 精炼用吹入氧枪、精炼用吹入氧枪设备、铁水的脱硅处理方法和铁水的预备处理方法 |
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