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    METHOD OF DESULFURIZING STEEL
    2.
    发明申请
    METHOD OF DESULFURIZING STEEL 有权
    钢的脱硫方法

    公开(公告)号：US20120180601A1

    公开(公告)日：2012-07-19

    申请号：US13106352

    申请日：2011-05-12

    申请人： Dhiren Panda ,  Neal Ross ,  Gary McQuillis ,  Jerome Jenkins

    发明人： Dhiren Panda ,  Neal Ross ,  Gary McQuillis ,  Jerome Jenkins

    IPC分类号： C21C1/02

    CPC分类号： C21C7/06 ,  C21C5/54 ,  C21C7/0645 ,  C21C7/076 ,  C21C7/10 ,  C21C2300/08 ,  Y02P10/216 ,  Y02P10/242

    摘要： A method of desulfurizing steel including steps of forming a slag over a molten metal, drawing a vacuum to less than 5 torr over the slag and molten metal, stirring the molten metal and slag, and deoxidizing and desulfurizing the molten metal and slag to degas the steel reducing at least sulfur, nitrogen, oxygen, and hydrogen contents, and reducing activity of oxygen in the molten metal to less than 30 ppm. The method includes forming a slag composition after degassing the steel comprising CaO between about 50 and 70% by weight, SiO2 between about 20 and 28% by weight, CaF2 between about 5 and 15% by weight, MgO not more than 8% by weight, Al2O3 not more than 1% by weight, and a combination of FeO+MnO not more than 2% by weight, where the sum of CaO+CaF2+SiO2+MgO is at least 85% by weight.

    摘要翻译： 一种脱硫钢的方法，包括在熔融金属上形成炉渣的步骤，在炉渣和熔融金属上抽真空至小于5托，搅拌熔融金属和炉渣，以及使熔融金属和炉渣脱气脱硫脱气 钢至少还原硫，氮，氧和氢含量，并将熔融金属中氧的活性降低到30ppm以下。 该方法包括在对包含约50-70重量％的CaO，约20-28重量％之间的SiO 2，约5-15重量％的CaF 2和不超过8重量％的MgO进行脱气之后， ，Al 2 O 3不超过1重量％，FeO + MnO的组合不超过2重量％，其中CaO + CaF 2 + SiO 2 + MgO的总和至少为85重量％。

    Method of desulfurizing steel
    3.
    发明授权
    Method of desulfurizing steel 有权
    钢脱硫方法

    公开(公告)号：US08523977B2

    公开(公告)日：2013-09-03

    申请号：US13106352

    申请日：2011-05-12

    申请人： Dhiren Panda ,  Neal Ross ,  Gary McQuillis ,  Jerome Jenkins

    发明人： Dhiren Panda ,  Neal Ross ,  Gary McQuillis ,  Jerome Jenkins

    IPC分类号： C21C5/36 ,  C21C7/10

    CPC分类号： C21C7/06 ,  C21C5/54 ,  C21C7/0645 ,  C21C7/076 ,  C21C7/10 ,  C21C2300/08 ,  Y02P10/216 ,  Y02P10/242

    摘要： A method of desulfurizing steel including steps of forming a slag over a molten metal, drawing a vacuum to less than 5 torr over the slag and molten metal, stirring the molten metal and slag, and deoxidizing and desulfurizing the molten metal and slag to degas the steel reducing at least sulfur, nitrogen, oxygen, and hydrogen contents, and reducing activity of oxygen in the molten metal to less than 30 ppm. The method includes forming a slag composition after degassing the steel comprising CaO between about 50 and 70% by weight, SiO2 between about 20 and 28% by weight, CaF2 between about 5 and 15% by weight, MgO not more than 8% by weight, Al2O3 not more than 1% by weight, and a combination of FeO+MnO not more than 2% by weight, where the sum of CaO+CaF2+SiO2+MgO is at least 85% by weight.

    摘要翻译： 一种脱硫钢的方法，包括在熔融金属上形成炉渣的步骤，在炉渣和熔融金属上抽真空至小于5托，搅拌熔融金属和炉渣，以及使熔融金属和炉渣脱气脱硫脱气 钢至少还原硫，氮，氧和氢含量，并将熔融金属中氧的活性降低到30ppm以下。 该方法包括在对包含约50-70重量％的CaO，约20-28重量％之间的SiO 2，约5-15重量％的CaF 2和不超过8重量％的MgO进行脱气之后， ，Al 2 O 3不超过1重量％，FeO + MnO的组合不超过2重量％，其中CaO + CaF 2 + SiO 2 + MgO的总和至少为85重量％。