Emulsion liquid membrane for extracting copper and cyanide in cyanide wastewater and method of use thereof

Abstract

An emulsion liquid membrane for extracting copper and cyanide from cyanide wastewater and a method of using the same. The raw material components are composed of an oil phase and a water phase. The raw materials of the oil phase are extraction carriers, mass transfer modifiers, and diluents. Agents and emulsifiers, or extraction carriers, mass transfer modifiers, stabilizers, diluents and emulsifiers; the usage method is: (1) Combine the emulsion liquid membrane used to extract copper and cyanide in cyanide wastewater with cyanide-containing The wastewater is mixed, mechanically stirred for dispersion and extraction, and allowed to stand for phase separation; (2) Demulsify the enriched emulsion obtained after phase separation to obtain a regenerated oil phase and an enriched water phase, and recover copper and cyanide from the enriched water phase. The method of the present invention effectively solves the problem of accumulation of copper in minerals in the cyanide leachate during the cyanide gold extraction process, and also solves the problem of recycling cyanide waste liquid, and has the advantages of improving economic benefits and promoting the treatment of cyanide-containing wastewater. The dual value of environmental protection.

Description

technical field [0001] The invention belongs to the field of environmental protection and extraction metallurgy, and in particular relates to an emulsion liquid membrane used for extracting copper and cyanide in cyanide wastewater and a use method thereof. Background technique [0002] Cyanide gold extraction is currently the dominant gold extraction method. With the continuous mining of gold mines, the grade of available gold mines gradually decreases, and the ore composition becomes increasingly complex, often containing a large amount of impurity metals such as copper. In the cyanidation leaching process, the impurity metal copper is often leached together with the gold, which leads to an increase in cyanide consumption and a sharp increase in production costs in the cyanide gold extraction process. Moreover, the copper contained in the cyanide solution brings great difficulties to the subsequent treatment of cyanide-containing wastewater. How to effectively extract val...

AI Technical Summary

Problems solved by technology

[0009] Due to the large volume of cyanide-containing wastewater and low content of valuable components, the extraction method often results in large solvent loss and high operating costs when using traditional mixing and settling tank equipment to treat cyanide-containing wastewater, so it is difficult to be practically applied

[0010] In addition, ion resin exchange technology has the advantage of selective adsorption, but when treating cyanide-containing wastewater containing metal impurities, the metal impurities in the complex state are strongly adsorbed on the ion exchange resin, which brings difficulties to the elution and regeneration of the resin, greatly Reduces the saturated adsorption capacity of the resin, which limits the application of ion exchange resins in the treatment of cyanide-containing wastewater