FIELD: metallurgy.
SUBSTANCE: method of complex processing comprises roasting of the dried pyritic raw materials at a temperature of 680÷725°C in a stream of air, depleted in oxygen content by adding nitrogen, and three consequent chloride leachings: hydrochloric-acid, chloride in the presence of atmospheric oxygen and chloride in the presence of strong oxidants in the form of hypochlorite, chlorine, chlorine dioxide, nitric acid, ozone. Wherein this process is performed using closed material flow systems, including regenerated hydrochloric acid and water, as well as the use of heat emitted at the various stages of the process. This allows to refer the proposed method to energy efficient and environmentally safe technologies.
EFFECT: obtaining liquid standard commodity products from the main components of pyritic raw materials.
6 dwg, 3 tbl, 2 ex
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