Elaboration technology of selective processing of acid mine waters of copper-pyrites complex mining plants

The actuality of elaboration technology of processing of acid mining waters of copper-pyrite deposits is stipulated by necessity to increase nature resources utilization efficiency. Implementation of it will allow to decrease the dead-weight losses of manganese, copper, iron and other metals. The developed technology includes a complex of sequentially executed processes. At the first stage extraction of Cu2+ ions by cementation is done, at the second stage extraction of Fe2+ and Fe3+ ions in the dispersed phase is done by acid-base deposition. At the third stage extraction of Mn2+ ions is done by transferring Mn2+ ions under the action of an oxidizing agent in insoluble forms of manganese and the subsequent extraction of the dispersed phase by the electro flotation method. The developed technology was tested on the acidic underspoil waters of the mining enterprises in the Ural region. The obtained practical results of the developed technology implementation have shown that, the technology introduction will make it possible to obtain copper, iron and manganese in the form of commercial products with a simultaneous decrease in their concentrations in adjacent water bodies to the maximum residue limit (MRL) standards. The developed technological recommendations for the manganese extraction from acid mine waters allow selective extracting manganese in the form of a flotation concentrate, with a manganese content of up to 50.1%. The resulting manganese concentrate can be used as feedstock in various metallurgical operations. The technology is simple, it can be used without applying complex expensive equipment both independently and within a system of existing treatment facilities.