Abstract
A combined pyro-hydrometallurgical technological method for obtaining silicon dioxide of. technical purpose and metal concentrates from technogenic ore formations resistant to chemical reagents is shown. The smelting of the raw materials prepared for the processing of technogenic formations is carried out by combined reagents, after which the melt formed is leached with an aqueous solution of hydrochloric acid under gel-like conditio¬ns¬. The reduced silicic acid is leached with a weak aqueous solution of hydrochlo¬r¬i¬c acid in order to remove impurities, and to be converted into silicon dioxide, it is subjected to heat treatment in atmospheric air. As a result of the process, the metals contained in technogenic formations are divided into solid and liquid concentrates.
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