METHOD FOR REFINING OF ALLOYS CONTAINING IRON AND READILY OXIDIZED COMPONENTS Russian patent published in 2004 - IPC

FIELD: ferrous metallurgy, in particular, melting in arc furnace of alloy steel or intermediate product for producing said steel. SUBSTANCE: method involves charging slag-forming mixture containing calcium oxide and carbon into electric furnace; melting said mixture for obtaining of liquid slag comprising calcium carbide; processing liquid alloy to be refined with liquid slag. Slag-forming mixture comprises calcium oxide and carbon used in weight ratio of 1:7. Slag produced upon melting of mixture comprises 10-80 wt% of calcium carbide. Alloy to be refined is processed by melting it in conjunction with slag-forming mixture in electric furnace and mixing liquid slag with liquid alloy to be refined. EFFECT: low-cost dephosphorization under reducing conditions, reduced losses of readily oxidized alloying components and reduced consumption of expensive alloying components used for melting of high-alloy steels. 2 cl, 1 tbl