METHOD OF PRODUCTION OF COMPLEX SILICEOUS FERRO-ALLOY Russian patent published in 2005 - IPC

FIELD: metallurgy; production of complex siliceous ferro-alloys containing alkaline-earth, rare-earth and other active elements for refining, modifying and micro-alloying of steel and iron.

SUBSTANCE: proposed method includes loading the furnace and fusion of charge containing quartzite and briquetted blend of ore part of charge with excessive carbon reductant required for reducing the main elements at lack of reductant in charge. Reduction intensifying agent and wastes of process are additionally introduced into blend for briquetting of ore part of charge with carbon reductant; wastes have form of ferro-alloy at size lesser than 1 mm, slag and sublimates in the amount of 2-10% and 1-15%, respectively. Used as intensifying agent are copper and nickel sulfides and/or oxides, borate ore and fluorspar.

EFFECT: reduced consumption of components; waste-free process; reduced power requirements.

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