METHOD FOR MANUFACTURING HIGH CLEANLINESS STEEL WITH LADLE REFINING WITH THE USE OF CARBIDE SLAG

摘要

PPROBLEM TO BE SOLVED: To provide an easy and inexpensive method for obtaining a steel material with high cleanliness, by adjusting a composition of treated slag with a ladle refining furnace so as to reduce oxide-based inclusions in the slag and the molten steel. PSOLUTION: The method for manufacturing the high cleanliness steel by ladle refining with the use of the carbide slag comprises conducting reduction refinement with the ladle refining furnace, then adding carbon particles onto the surface of the slag, subsequently conducting reduction vacuum degassing, then returning it to the ladle refining furnace, and stirring the molten steel weakly by a bubbling gas. PCOPYRIGHT: (C)2003,JPO