Electrochemical separation and recovery method for gold and silver in copper matte

Abstract

The invention relates to an electrochemistry parting method of bullion in matte, which comprises procedures as follows: (1) electrochemistry dissolving: the matte anode plate and the copper negative plate of an outer housing anode bag are arranged at intervals in an electrochemistry dissolving tank containing sulphuric acid for the electrochemistry dissolving, and the byproduct of copper powder is produced; (2) oxidation and impurity removal: nitric acid is added into matte anode mud dissolved by the electrochemistry for oxidation and impurity removal; (3) filtration: after being oxidized and edulcorated , the matte anode mud is filtered; and sodium chloride is added into filtered liquor to generate depositional silver chloride; (4) aqua regia parting: filtered filter mass is put into the aqua regia for the aqua regia parting; (5) filtration: after the aqua regia parting, the filter mass is filtered; and (6) deoxidization: sodium sulfite is added into the filtered liquor containing gold and the filtered liquor is deoxidized into gold powder. The electrochemistry parting method solves the dynamic problem of matte extraction and has the characteristics of rapid extraction speed, little treating solution, short process, low investment, high comprehensive rate, good product purity, etc.

Description

1. Technical field [0001] The invention relates to an electrochemical separation and recovery method for gold and silver in matte copper. 2. Background technology [0002] Matte is a product of fire smelting pond mud calcined sand. The chemical composition of matte is shown in the table below: [0003] [0004] It can be seen from the table that copper matte contains Cu 43.14%, Fe 19.88%, and S 22.14%, which are basically the same as the process product matte of copper smelters. It is a kind of sulfide composed of cuprous sulfide and ferrous sulfide. co-melt. Matte is a good carrier for precious metals like gold and silver. [0005] At present, the main method for processing and recycling gold and silver in matte copper is: firstly, the matte copper is blown into blister copper by fire method, then the blister copper is electrolyzed, and finally the copper anode slime is wet-processed to recover precious metal gold and silver. This method has a long cycle and process M...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for electrochemical separation and recovery of gold and silver in matte, which can solve the problems of large investment, long treatment period, many procedures and difficulty in wet treatment and leaching of matte.

Images