公开(公告)号：US06547849B2

公开(公告)日：2003-04-15

申请号：US10114627

申请日：2002-04-02

申请人： Clay Gross ,  Rama Ballav Mahapatra ,  Walter W. Blejde ,  Steve Leonard Wigman

发明人： Clay Gross ,  Rama Ballav Mahapatra ,  Walter W. Blejde ,  Steve Leonard Wigman

IPC分类号： C21C7064

CPC分类号： B22D11/116 ,  B22D11/117 ,  C21C5/34 ,  C21C7/0075 ,  C21C7/0087 ,  C21C7/06 ,  C21C7/0645

摘要： A steel charge and slag forming material is heated in a ladle to form molten steel covered by a slag containing silicon, manganese and calcium oxides. The steel is stirred by injection of an inert gas such as argon or nitrogen to cause silicon/manganese-deoxidation and desulphurization to produce a silicon/manganese killed molten steel. Stirring of the molten steel by the inert gas injection while in contact with slag high in calcium oxide generates low free oxygen levels in the steel and desulphurization to sulphur levels below 0.009%. The slag may subsequently be thickened by lime addition to prevent reversion of sulphur back into the steel and oxygen may be injected into the steel to increase its free oxygen content to produce a steel that is readily castable in a twin roll caster.

摘要翻译： 钢包装和成渣材料在钢包中加热以形成由含硅，锰和氧化钙的炉渣覆盖的钢水。 通过注入惰性气体例如氩气或氮气来搅拌钢，以引起硅/锰脱氧和脱硫以产生硅/锰杀死的钢水。 通过惰性气体注入在与氧化钙高的矿渣接触的情况下搅拌钢水，在钢中产生低的游离氧含量，脱硫至低于0.009％的硫含量。 炉渣随后可以通过石灰添加来增稠，以防止硫回到钢中，并且可以将氧气注入到钢中以增加其游离氧含量，以产生易于在双辊铸造机中浇铸的钢。