PROSPECTS FOR THE USE OF THE KUZBASS MINERAL RESOURCE BASE IN THE PRODUCTION OF MAGNESIA FLUXES FOR CONVERTER MELTING

In order to substantiate the possibility and expediency of producing magnesium-containing fluxes from local raw materials, which are embedded in converter slag using the technology of applying slag garnishing to the lining of oxygen converters, a set of studies has been conducted. The indicators of the process of acidic leaching of magnesium oxide from the waste of the enrichment of serpentine-magnetite hands of the Abagur sintering plant, including the patterns of influence of the type of acids used, their concentration, pulp temperature and granulometric composition of the initial waste, are studied. According to the obtained patterns, the degree of extraction of magnesium oxide from serpentine when used for leaching hydrochloric, sulfuric and nitric acids increases with an increase in their concentration from 5% to 20%, and with a further increase in the concentration of these acids changes slightly and, in some cases, in different directions. It is shown that an increase in pulp temperature from 30 °C to 80 °C significantly increases the degree of extraction of magnesium oxide from serpentine, all other things being equal, and a further increase in pulp temperature up to 110 °C no longer has a significant effect on the degree of extraction of magnesium oxide. A significant effect of increasing the degree of grinding of serpentine on the degree of extraction of magnesium oxide from it, regardless of the type of acid used, other things being equal, has been established. Additionally, studies of the kinetics of the acid leaching process under consideration confirmed the significant effect of an increase in temperature on an increase in the degree of extraction of magnesium oxide from serpentine, and also established the effect of an increase in the duration of the process under consideration on its effectiveness. Based on the conducted research, variants of technological schemes for the complex processing of serpentine-magnetite ores are proposed, including the leaching of magnesium oxide from serpentine, followed by neutralization of the mother liquor and extraction of valuable components from it.

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