POLYMETALLIC MANGANESE ORE DRESSING AND OPTIMAL USE OF THE OBTAINED CONCENTRATES

Manganese ores are detected in the Altai – Sayan metallogenic
zone, they can be referred to the polymetallic ores, but they
cannot be used for standard alloys production without preliminary
dressing as they have a high content of phosphorus and iron. Thermodynamic calculations and experimental investigations on polymetallic manganese raw material dressing have determined some basic technological parameters of recovering and technological
diagram of dressing. Obtaining of high- quality concentrates of manganese, nickel, iron, cobalt is possible due to that technological diagram. The application of optimal technological parameters of dressing can retrieve up to 95 – 97 % of manganese, 98 – 99 % of nickel and 96 – 98 % of iron from polymetallic manganesecontaining raw material. It has been demonstrated that manganese concentrate can be used for manganese smelting and for  teels with low content of phosphorus, and that allows reducing import of manganese materials. The technology of steel alloying with the usage of the obtained nickel concentrate has been worked out; and when metallic nickel is substituted by nickel concentrate, the costs for alloying are reduced considerably. The technology of
metalized iron obtaining by the method of solid-phase recovery and iron concentrate has been worked out, and it can allow decreasing 
harmful impurities in steel.

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