Wet method lixiviating method for copper-contained tailings

Abstract

The invention discloses a wet method lixiviating method for copper-contained tailings, belonging to a tailing comprehensive utilization technical method. The method comprises the following steps of: firstly carrying out soda treatment on the copper-contained tailings, then adding ammonium salt with a certain concentration, respectively carrying out dump leaching and agitation leaching according to the thickness of the granularity of the copper-contained tailings to obtain lixivium having higher copper concentration, finally recovering metal copper with conventional extraction, electrowinning process or direct electrowinning, and returning an ammonium salt contained solution for lixiviating. The method has the advantages of simple process, short process, low energy consumption, no additional equipment, easy implementation, comprehensive recovery of copper resource, less investment and low production cost, and is a copper recovering method which is easy to realize industrial production and has good economic benefits.

Description

technical field The invention relates to a tailings comprehensive utilization method, in particular to a wet leaching method for copper-containing tailings. Background technique Copper is an important non-ferrous metal and an irreplaceable important raw material in the development of the national economy. It is widely used in various fields of military industry, electronics, communications, construction, light industry, machinery manufacturing and transportation. With the development of the national economy, The demand for copper is increasing year by year. my country needs to import a large amount of copper raw materials and products every year, and the contradiction between supply and demand of copper is very prominent. A large amount of copper-containing tailings exists in the selective leaching gold extraction tailings of gold mines and intermediate products of copper smelting processes, such as waste water and slag. This part of the tailings is strongly alkaline. If t...

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Problems solved by technology

This part of the tailings is strongly alkaline. If the traditional acid method is used for recovery, a large amount of acid will be consumed, making the copper extraction process uneconomical.

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