METHOD OF PRODUCING CAST IRON AND STEEL IN METALLURGICAL ASSEMBLIES Russian patent published in 1998 - IPC

FIELD: ferrous metallurgy. SUBSTANCE: method includes charging, heating, smelting, and reducing charge containing, among other components, briquets prepared from iron-containing material and binding agent. Briquets are preliminarily roasted, and, as binding agent, system SiO₂-CaO-Na₂O-Al₂O₃ is used which, under roasting, forms together with iron oxides a gasproof frame inside which reduction processes occur. Assembly is additionally charged by molten metal additives as briquets' heating source. Carbon-containing material is introduced into briquet in quantity determined by carbon to iron weight ratio 0.3 to 1.0, particle size of carbon-containing material being 10 to 100 times larger than minimum size of iron-containing material. EFFECT: enhanced efficiency of process. 3 cl, 1 tbl