Comprehensive recovery processing method for waste hybrid copper chloride etching liquid

Abstract

The invention discloses a comprehensive recovery processing method for waste hybrid copper chloride etching liquid, which belongs to the field of non-ferrous metal and metallurgical valuable metal recover. The technological process of the method mainly comprises the following steps: (1) concentrating copper chloride etching liquid; (2) carrying out spray pyrolysis on a concentrated copper chloride solution so as to form copper oxide composite powder; (3) recovering chlorine so as to prepare a refined hydrochloric acid; (4) leaching the copper oxide composite powder by using a sulfuric acid; and (5) carrying out selective electrodeposition on copper sulfate leaching liquid by using a rotational flow electrolysis system so as to obtain a cathode copper product which of chemical compositions reach 1# copper product standards. The method disclosed by the invention is simple in process, short in flow, environment-friendly, and simple and feasible in operation, can effectively implement the comprehensive recovery of acidic and alkaline copper chloride etching liquid and the direct production of high-quality copper products, and effectively converts chlorine ions in waste liquid into refined hydrochloric acid products, thereby achieving the efficient and comprehensive utilization of resources.

Description

technical field

[0001] The invention belongs to the technical field of recovery of valuable metals in hydrometallurgy of non-ferrous metals, and in particular relates to a method for comprehensive recovery and treatment of mixed copper chloride waste etching solution. Background technique

[0002] In recent years, the rapid development of the copper products industry has brought about the generation of a large amount of copper-containing waste liquid. At the same time, the country's environmental protection requirements are increasing day by day. Therefore, the treatment and discharge of copper-containing waste has become a major problem for enterprises. Technically, the removal of free divalent copper ions is relatively mature, and the mass concentration of residual copper ions in the solution after treatment can be reduced to below 1mg / L. However, in the copper-containing wastewater of dyestuff, electroplating, circuit board (PCB) and other industries, copper ions often e...