METHOD OF STEEL-MAKING IN ELECTRIC-ARC FURNACE Russian patent published in 2003 - IPC

FIELD: ferrous metallurgy; steel-making in electric-arc furnaces. SUBSTANCE: charge consists of briquette containing oxidized iron- containing material, carburizing agent, alloying additive, iron-carbon alloy and slag-forming material. Fine scrap is loaded on furnace hearth and then briquettes, cast iron and remaining scrape are loaded at the following relationship: (0.3-0.6) : (0.2-2.5) : (4.0-9.0). Binder and plasticizing agent are additionally introduced into briquettes at the following relationship of components, mass-%: oxidized iron-containing material, 5-57; carburizing agent, 20-30; binder, 10-20; alloying additive, 1-15; iron-carbon alloy, 1-30; slag-forming material, 1-10 and plasticizing agent, 1-10. EFFECT: reduced usage of material; low cost of process; reduced power requirements; enhanced stability of lining; reduced consumption of fuel. 2 cl, 2 tbl