Patent ID: 6261339
Filing Date: 2001-07-17
Classification: C21B,C21C,Y02W

Abstract:
A method for desiliconizing pig iron prior to subsequent refining to steel, comprising:charging molten steel slag comprising iron oxide and chromium oxide onto a pig iron bath tapped from a blast furnace and containing Si, and optionally onto a blast furnace slag tapped from the blast furnace, to form a slag-iron bath and reacting the molten steel slag with the pig iron bath; andmaintaining the slag-iron bath below 1500.degree. C. in temperature,wherein the molten steel slag is charged onto the pig iron bath in an amount sufficient to decrease the Si content of the pig iron bath to below 0.5% by weight while simultaneously generating SiO.sub.2 and to reduce the iron oxide and chromium oxide of the molten steel slag to liquid metals.