Abstract
The article is devoted to the topical issue of complex processing of technogenic water resources with the possibility of extracting manganese in the form of conditioned raw materials for metallurgical enterprises. The paper discusses natural and man-made factors affecting the formation of manganese-containing effluents on the territory of mining enterprises of the copper-pyrite complex (volumes and concentration of manganese in water systems). The results of factor analysis of the process of selective extraction of manganese from technogenic hydromineral resources formed as a result of development of copper-pyrite deposits are presented. Based on the results of the experiment, the possibility of obtaining high-quality manganese-containing products is justified. To extract manganese from aqueous solutions, a method is proposed based on a combination of two electrochemical processes: electrooxidation of manganese ions to insoluble hydroxoforms Mn (III, IV) and subsequent electroflotation extraction of the precipitate. Experimental studies were carried out using a diaphragm-free two-chamber flow-type electroflotator, in which the ratio of the volumes of the electrooxidation and electroflotation chambers was 1:3. Rational technological parameters of the electroflotator operation correspond to the following values: for the first chamber of the electrolyzer - pH from 4 to 6, electroprocessing of solutions for at least 1 minute, anode current density 300 A/m2, concentration of chloride ions in the range 600-650 mg/dm3; and in the second chamber of the electrolysis cell - pH from 6 to 7.5, electrotreatment of solutions for at least 10 minutes and 10 minutes at cathode current density of 100 A/m2. The quality of the manganese-containing products obtained in the work allows us to assert that the proposed technology for the integrated processing of hydrotechnogenic manganese-containing georesources makes it possible to obtain additional scarce products from the non-metallic part of the waste.
Keywords:
manganese, hydrotechnogenic raw materials, metals, technology, electrooxidation, electroflotation.