Ilmenite Reduction by a Carbon Injection Technique.
37th Electric Furnace Conf Proc AIME Detroit Mich Dec 4-7 1979 1979 Dec; 37:12 pages
Declining domestic reserves of highgrade ores have stimulated interest in the efficient use of more plentiful materials such as ilmenites and titaniferous magnetites for the production of pigment- grade tio2 and raw materials for steelmaking operations. Materials containing high levels of tio2 cannot be used in blast furnace operations, owing to the formation of titanium carbide and/or nitride. These deposits increase the viscosity of the slag so that reduction reactions occur with difficulty. Success was achieved by reducing titaniferous materials in an electric-arc furnace under carefully controlled conditions. Traditionally, the preparation of charge materials for the reduction of titaniferous ores and concentrates in an electric-arc furnace was accomplished either by mixing the carbonaceous reductant with the charge or by pelletizing the reductant with the ore. In most cases, carbon utilization ranging from 29 to 39 pct were realized when coke was used with or without woodchips. Reserves of domestic coking coals were limited. Therefore, use of alternate byproduct or readily available reductants should be encouraged. In addition, conventional techniques for adding carbonaceous reductants to electric-arc furnaces often result in undesirable environmental degradation.
37th Electric Furnace Conf. Proc., AIME, Detroit, Michigan, Dec. 4-7, 1979, V. 37, July 1980