Patent ID: 6203848
Filing Date: 2001-03-20
Classification: C10L,C21B

Abstract:
A method for increasing a charring ratio of coal used for reducing and melting an iron ore in a melter-gasifier in the smelting reducing ironmaking process, comprising the steps of:preparing a magnesium oxide (MgO) suspension;mixing said prepared MgO suspension with said coal wherein said MgO suspension is mixed with said coal so that the amount of MgO in said MgO suspension is in the range from about 2 g to about 9.7 g based on 100 g of dried coal when said basicity of said slag required in said ironmaking process is about 1.0 to about 1.3;drying said mixture to attach MgO onto a surface of said coal so as to restrain the generation of volatile matter of the thus obtained coal in the melter-gasifier; andfeeding said coal into the melter-gasifier in the smelting reducing ironmaking process.