公开(公告)号：US4661151A

公开(公告)日：1987-04-28

申请号：US835554

申请日：1986-03-03

申请人： Koichi Endoh ,  Toshiyuki Kaneko ,  Hideo Yaoi ,  Seiji Aso ,  Yasuo Obana ,  Hideyuki Takahama

发明人： Koichi Endoh ,  Toshiyuki Kaneko ,  Hideo Yaoi ,  Seiji Aso ,  Yasuo Obana ,  Hideyuki Takahama

IPC分类号： C21C7/064 ,  C21C7/02

CPC分类号： C21C7/0645

摘要： A treating agent of molten steel according to the present invention is used for desulfurization molten steel for desulfurizing it in a reaction vessel which is lined with a basic refractory containing MgO, and consists of CaO, CaF.sub.2 and MgO and unavoidable impurities contains from 10 to 60% by weight of MgO, and has a weight ratio of {(% CaF.sub.2)/((% CaO)+(% CaF.sub.2))}.times.100(%) of from 20 to 80%.Said agent is injected with the aid of inert carrier gas into the molten steel and floats toward a portion of the molten steel bath essentially free of slag. Another treating agent essentially consisting of CaO and CaF.sub.2 may be also injected prior and/or subsequent to injection of said agent, so as to decrease inclusions. The inert gas may also be injected after injection of said agent(s).

摘要翻译： 根据本发明的钢水处理剂用于脱硫用的脱硫钢水，该反应容器内衬有含有MgO的碱性耐火材料，由CaO，CaF 2和MgO组成，不可避免的杂质含有10〜60 重量％的MgO，重量比为{（CaF2）/（（CaO）+（％CaF2））}×100（％）为20〜80％。 所述试剂借助于惰性载气注入钢水中，并向基本上不含渣的钢水浴的一部分漂浮。 基本上由CaO和CaF 2组成的另一种处理剂也可在注入所述试剂之前和/或之后注入，以便减少夹杂物。 惰性气体也可以在注入所述试剂之后注入。