METHOD OF COKE-FREE PROCESSING OF VANADIUM-CONTAINING ORE MATERIAL FOR MAKING VANADIUM-ALLOYED STEEL, HOT METALLIZED PELLETS AND VANADIUM SLAG Russian patent published in 2006 - IPC C21B13/14 

FIELD: metallurgy; metallization and electric steel making processes.

SUBSTANCE: metallization of vanadium-containing ore material is performed in shaft furnace with the use of hot reducing gases fed from gasifier having liquid bath at simultaneous production of vanadium-containing semi-product and vanadium-containing slag. Metallized material, vanadium-containing semi-product and metallurgical scrap are fed to electric arc furnace for making steel. Prior to supply of vanadium-containing semi-product to electric furnace it is admitted to vanadium-extraction unit for oxidation of vanadium and obtaining refined semi-product and vanadium-containing slag. Then, refined semi-product, metallized material and metallurgical scrap are fed to electric furnace. First, refined semi-product and metallurgical scrap are fused and metallized material is fed and is fused till steel is made. Vanadium-containing slag produced during evacuation of vanadium from vanadium-containing semi-product and metallized material not used for making steel are used as commercial product.

EFFECT: low cost of process of making vanadium-alloyed steel; reduced power requirements; increased degree of extraction of vanadium at all stages of technological chain.

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