Patent ID: 6149709
Filing Date: 2000-11-21
Classification: C21B,Y02P

Abstract:
An iron making method for preparing a molten iron containing from 1.5 to 4.5% carbon, the method comprising:(a) providing iron oxide and a carbonaceous reducing agent;(b) preparing a shaped product from the carbonaceous reducing agent and the iron oxide;(c) preparing solid reduced iron from the shaped product, wherein the solid reduced iron has a metallization of at least 60%, a specific gravity of at least 1.7, and a carbon content of at least 50% of the theoretical amount required for reducing the iron oxide remaining in the solid reduced iron; and(d) before substantial cooling occurs, heating the solid reduced iron after the solid reduced iron is submerged entirely in a foam of molten slag in an arc heating melting furnace, thereby preparing the molten iron containing from 1.5 to 4.5% carbon; whereina basicity of the foam of molten slag is from 1.0 to 1.8.