METHOD FOR REDUCING CHROMIUM CONTENT IN SLAG AT Smelting STAINLESS STEEL

摘要

FIELD: non-iron metallurgy, method for high-chromium (more than 9 % of chromium content) intermediate melting in electric arc furnace followed by refining in bottom-blowing converter. ^ SUBSTANCE: claimed method includes melting of steel waste and alloy additives, deoxidizer feeding, and slag foaming in electric furnace. Than chromium containing in slag is reduced; oxygen is fed into bath, intermediate and slag discharged into overflow ladle, slag is skimmed, metal is charged into bottom-blowing converter, melt is decarbonized, and desired chemical composition is adjusted. For finished and fuller chromium reducing slag-forming additives and deoxidizers are fed in process of intermediate and slag discharging into overflow ladle, when said ladle is filled on 2/3. Method of present invention makes in possible to increase chromium yield from slag at least to 70 %. ^ EFFECT: increased chromium yield, decreased ferrous alloys consumption, accelerated melt process and reduced energy consumption. ^ 2 cl, 1 ex