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

A separation and recovery, electrochemical technology, applied in optics, process efficiency improvement, photographic technology and other directions, can solve the problems of large investment in matte fire treatment, difficult leaching in wet treatment, long treatment period, etc., and achieve good product purity. , the effect of reducing the dosage and speeding up the leaching speed

Active Publication Date: 2009-01-07
ZIJIN MINING GROUP
View PDF0 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electrochemical separation and recovery method for gold and silver in copper matte
  • Electrochemical separation and recovery method for gold and silver in copper matte
  • Electrochemical separation and recovery method for gold and silver in copper matte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] Such as figure 1 , figure 2 Shown, the electrochemical separation and recovery method of gold and silver in matte, the method comprises the following process steps:

[0035] a. Electrochemical dissolution, place the matte cast plate of the outer cover anode bag (2) as the anode plate (1) and the copper cathode plate (3) at equal intervals in the electrochemical dissolution tank filled with 5-15% concentration of sulfuric acid solution In the tank body (4), pass direct current at a current density of 80-200Am -2 , Electrochemical dissolution is carried out under the process conditions of cell voltage 1-5V and temperature 20-50°C;

[0036] b. Oxidation and impurity removal, adding 20 to 50% concentration of nitric acid solution to the electrochemically dissolved matte anode slime for oxidation and impurity removal;

[0037] c. Filtration, filtering the matte anode slime after oxidation and removal of impurities, filtering out the filtrate and filter cake, adding sodiu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/20C22B11/00
CPCY02P10/20
Inventor 简椿林林志坚张新振蓝雄刘亚建陈期生
Owner ZIJIN MINING GROUP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap