RECOVERY OF HEMATITE DUE TO HEAT TREATMENT OF MECHANICALLY ACTIVATED IRON ORE MATERIAL

The paper presents the results of research on the influence of heat treatment in a vacuum and the molecular hydrogen environment of hematite-containing ore material on the reduction of iron oxide. Hematite ore, the main phase components of which are SiO2 and Fe2 O3 oxides, were previously subjected to mechanoactivation in a vibrating mill for 70 h., of which 30 h. in the air, 10 h. in water and 30 h. in water with the addition of iron. X-ray diffraction and X-ray spectral analyzes show that annealing in a vacuum (Т = 600°С, τ = 1 h.) leads to partial reduction of hematite to magnetite, and heat treatment in a molecular hydrogen atmosphere (р=0,6МПа, Т = 500°С) allow to obtaining pure iron.