Separation of metals from technological solutions Copper production
Abstract
At the copper smelting plant of JSC Almalyk MMC, technological solutions containing 60-90 g/l of copper and 15-25 g/l of nickel are formed in the process of copper sulfate production. The technological solutionswas investigated using physical and chemical treatment methods. The analysis of the pH value of the deposition of metal hydroxides. These solutions undergo deep electrolysis of copper. Nickel is not extracted due to the lack of cost-effective technology. In the work, the possibility of separate extraction of copper and nickel from technological solutions using the methods of precipitation with milk of lime is studied.To facilitate mixing of the solution, the copper-containing precipitate is separated from the solution by two-stage precipitation. In two stages of precipitation with the addition of milk of lime at pH = 5.5-6, the degree of deposition of copper and nickel is 98% and 6.5%, respectively, which allows nickel to be extracted from the solution. Found technological solutions can be applied in other industries related to the processing of copper-containing products.