发明授权
- 专利标题： Low cost making of a low carbon, low sulfur, and low nitrogen steel using conventional steelmaking equipment
- 专利标题（中）： 使用传统炼钢设备低成本制造低碳，低硫和低氮钢
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申请号： US12414047申请日： 2009-03-30
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公开(公告)号： US08313553B2公开(公告)日： 2012-11-20
- 发明人: Jacobus Marthinus Andreas Geldenhuis , David John Sosinsky , Daniel Gene Murray , David Wayne McGaughey , Eugene B. Pretorius
- 申请人： Jacobus Marthinus Andreas Geldenhuis , David John Sosinsky , Daniel Gene Murray , David Wayne McGaughey , Eugene B. Pretorius
- 申请人地址： US NC Charlotte
- 专利权人： Nucor Corporation
- 当前专利权人： Nucor Corporation
- 当前专利权人地址： US NC Charlotte
- 代理机构： Hahn Loeser & Parks LLP
- 代理商 Arland T. Stein
- 主分类号： C21C7/10
- IPC分类号： C21C7/10 ; C21C7/064 ; C21C7/068
摘要：
A method of making a steel with low carbon less than 0.035% by weight including steps of preparing a heat of molten steel composition in a steelmaking furnace to a tapping temperature as desired for desulfurization at a VTD, tapping open into a ladle the molten steel composition with an oxygen level between about 600 and 1120 ppm, providing slag forming compound to the ladle to form a slag cover over the molten steel composition in the ladle, transporting the molten steel composition in the ladle to a VTD, decarburizing the molten steel composition at the VTD by drawing a vacuum of less than 650 millibars, after decarburizing, adding one or more deoxidizers to the molten steel composition and deoxidizing the molten steel composition, after deoxidizing, adding one or more flux compounds to desulfurize the molten steel composition, and casting the molten steel composition to form a steel with low carbon less than 0.035% by weight.
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