METHOD FOR MELTING LARGE-SIZED COLD IRON SOURCE IN MOLTEN IRON CARRIER

摘要

PPROBLEM TO BE SOLVED: To provide a method for melting large-sizes cold iron source in a molten iron carrier by which even in the case of the large-sized and heavy billet scrap and slab scrap, the operation in a steelmaking process is adversely affected, and these scraps can be melted thermally more advantageously as compared with a converter. PSOLUTION: A technique by which the cold iron source is beforehand laid into the molten iron carrier, the molten iron from a blast furnace is received and this cold iron source is melted by using this sensible heat and stirring force, is improved. Specifically, the cold iron source is divided into two kinds of the small-size and the large-size and firstly, after beforehand laying the small-sized cold iron source as a shock-buffering material, the large-size heavy weight steel scrap is charged and also, a desiliconizing treatment and/or a dephosphorizing treatment accompanied with the blowing of gas or the stirring with an impeller after receiving the molten iron, are carried out. PCOPYRIGHT: (C)2006,JPO&NCIPI