ON THE USE OF KOVDOR IRON ORE IN SINTERING PROCESS

Abstract

Recently, the demand for iron ore concentrates of the Kovdor deposit has been maintained, despite the complexity of their use for the production of man-made raw materials. Magnetite of Kovdor ore has a heterogeneous structure and its iron does not participate in melt formation processes during sintering of agglomerates. Therefore, up to the basicity of 2.0, a silicate glass phase is a binder of ore grains of the finished product. With the increase in basicity above 2.0, the mineral composition and microstructure of the agglomerates change. Magnetite is oxidized to hematite, an alumino-siliciferite appears on the hematite contact with the high-calcium melt, the residual melt crystallizes to form a titanium-containing silicate.