JP4069837B2 - 溶銑の脱燐方法 - Google Patents
溶銑の脱燐方法 Download PDFInfo
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- JP4069837B2 JP4069837B2 JP2003312533A JP2003312533A JP4069837B2 JP 4069837 B2 JP4069837 B2 JP 4069837B2 JP 2003312533 A JP2003312533 A JP 2003312533A JP 2003312533 A JP2003312533 A JP 2003312533A JP 4069837 B2 JP4069837 B2 JP 4069837B2
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- 石灰石の焼成後に生石灰の微粉砕工程を経ずに篩にかけることのみで製造される、粒径が1mm以下の微粉の比率が20質量%以上、かつ、粒径1mmを超える粗粉の比率が50質量%以上を占め、かつ、粒径2.38mmを超えるものの比率が15質量%以下である生石灰粉を用いて、その生石灰粉を上吹きランスよリキャリアガスとともに、転炉型反応容器内に収容された溶銑に吹き付けることを特徴とする、溶銑の脱燐方法。
- 転炉型反応容器内に収容された溶銑に、石灰石の焼成後に生石灰を篩にかけて製造される、粒径1mm超2.38mm以下の粗粉が50質量%以上、かつ、粒径2.38mmを超えるものの比率が15質量%以下を占め、かつ粒径1mm以下の微粉が20質量%以上50質量%未満を占める生石灰粉を上吹きランスよりキャリアガスとともに吹き付けることを特徴とする、溶銑の脱燐方法。
- 前記生石灰粉の吹き付けに加えて、副原料としてさらに取鍋スラグを前記溶銑に投入する、請求項1または2に記載の溶銑の脱燐方法。
- 前記上吹きランスの先端に設けた粉体吹出し孔の形状が、先細りになっていることを特徴とする請求項1〜3のいずれか1項に記載の溶銑の脱燐方法。
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JP2003312533A JP4069837B2 (ja) | 2003-09-04 | 2003-09-04 | 溶銑の脱燐方法 |
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JP2003312533A JP4069837B2 (ja) | 2003-09-04 | 2003-09-04 | 溶銑の脱燐方法 |
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JP2005082812A JP2005082812A (ja) | 2005-03-31 |
JP4069837B2 true JP4069837B2 (ja) | 2008-04-02 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010121158A (ja) * | 2008-11-18 | 2010-06-03 | Sumitomo Metal Ind Ltd | 溶銑の脱燐方法 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5234124B2 (ja) * | 2011-02-24 | 2013-07-10 | Jfeスチール株式会社 | 精錬方法及び溶鋼の製造方法 |
JP5768721B2 (ja) * | 2012-01-04 | 2015-08-26 | 新日鐵住金株式会社 | 溶銑の脱燐吹錬方法 |
JP6897289B2 (ja) * | 2017-05-01 | 2021-06-30 | 日本製鉄株式会社 | 地金切りランス |
KR102156718B1 (ko) * | 2018-11-05 | 2020-09-16 | 주식회사 포스코 | 정련제 및 이를 이용한 용선 정련 방법 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2010121158A (ja) * | 2008-11-18 | 2010-06-03 | Sumitomo Metal Ind Ltd | 溶銑の脱燐方法 |
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