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

Abstract

Provided are an emulsion liquid membrane for extracting copper and cyanide in cyanide waste water and a use method thereof.Raw materials are composed of an oil phase and a water phase, and the raw materials of the oil phase comprise an extraction carrier, a mass transfer modifying agent, a diluent and an emulsifying agent or comprise an extraction carrier, a mass transfer modifying agent, a stabilizer, a diluent and an emulsifying agent.The use method comprises the steps that the emulsion liquid membrane used for extracting copper and cyanide in the cyanide waste water is mixed with cyanide-containing waste water, mechanical stirring is conducted for dispersing and extracting, and standing is conducted for phase separation; 2, an enriched emulsion obtained after phase separation is conducted is demulsified, a regeneration oil phase and an enriched water phase are obtained, and copper and cyanide are recycled from the enriched water phase.By means of the use method, the accumulation problem of copper in minerals in cyanide leaching liquid in the cyanide gold leaching process is effectively solved, the recycling problem of cyanide waste liquid is also solved, and dual value of improving economic benefit and promoting environmental protection is achieved in the cyanide-containing waste water treatment process.

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