IMPROVEMENT OF THE SMELTING TECHNOLOGY FOR VANADIUM IRON BY REGULATING PROCESSES OF REDUCTION OF TITANIUM OXIDES

摘要

Blast-furnace melting of titaniferous magnetites is complicated by processes connected with formation of titanium oxycarbonitrides in the furnace. An intensive increase in the latter in the Nizhnii Tagil Metallurgical Works' (NTMK) blast furnaces was due to a significant concentration of titanium oxides in the iron-ore raw material introduction of titanium into the crystalline lattice of magnetite, and a high value of the hearth's reduction potential Titanium carbides were responsible for formation of small segregations of metal in the melt: shot. The contents of solid-phase, refractory titanium carbides and shot raises the viscosity of the blast-furnace slag, leads to "overgrowth" of the hearth with refractory masses and a reduction in its drainage ability, and increases losses of pig iron. with the slag is tapping. Deterioration of the slag's properties reduces the technical and economic indices of the NTMK blast furnaces that smelt vanadium iron from titaniferous magnetites of the Kachkanar processing works.