Method for enhancing gold precipitation grade in gold electrorefining process

An electrolytic refining and crafting technology, which is applied in the field of gold electrolytic refining, can solve the problem of low gold precipitation and other problems, and achieve the effects of strong corrosion resistance to hydrochloric acid, stability assurance, and easy production

Inactive Publication Date: 2014-02-19
BAIYIN NONFERROUS GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for improving the gold precipitation grade in the gold el

Method used

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  • Method for enhancing gold precipitation grade in gold electrorefining process
  • Method for enhancing gold precipitation grade in gold electrorefining process
  • Method for enhancing gold precipitation grade in gold electrorefining process

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Embodiment Construction

[0020] A method for improving the gold precipitation grade in a gold electrolytic refining process, using crude gold as an anode, pure gold as a cathode, and gold trichloride solution as an electrolyte for electrolytic refining; figure 1 As shown, wherein, the outside of the anode plate 3 made of coarse gold is covered with a pocket-shaped diaphragm 1 made of polypropylene, the mesh of the diaphragm 1 is 800-850 mesh, and the upper opening of the diaphragm 1 is provided with a hook 2 , for fixing the diaphragm 1.

[0021] The technical and economic indicators of the above-mentioned process method are as follows:

[0022] Crude gold grade (mass fraction): Au: 88%—95%

[0023] Cathode grade (mass fraction): Au≥99.996%

[0024] Anode specification: 180×140mm×10mm

[0025] Cathode specification: 180×140mm×0.2mm

[0026] Electrolyte composition: Au:250—350g / L, HCL:150—300 g / L

[0027] Current density: 280—350A / m??

[0028] Electrolyte temperature: 30-40°C

[0029] Electrolyz...

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Abstract

The invention provides a method for enhancing the gold precipitation grade in a gold electrorefining process. According to the method, a coarse gold plate is adopted as an anode, a pure gold plate is adopted as a cathode, and a gold chloride solution is taken as an electrolyte solution to perform electrorefining. Specifically, the outside of the anode is sleeved with a pocket shaped diaphragm made of polypropylene fiber, and the mesh opening of the diaphragm is 800-850 meshes. The cathode is made by the method of: taking the coarse gold plate as the anode, adopting a titanium alloy plate as the cathode, and using a gold chloride solution as an electrolyte solution to conduct electrolysis, precipitating out a pure gold layer on both sides of the titanium alloy plate, and stripping the pure gold layer, thus obtaining a cathode plate used for gold electrorefining. The method provided by the invention effectively avoids adsorption of AgCl and part of insoluble metal impurities on the cathode, thereby enhancing the gold precipitation grade and ensuring the stability of gold electrolysis production. At the same time, by improving the quality of a gold starting sheet, the gold precipitation grade is further improved.

Description

technical field [0001] The invention belongs to the technical field of gold electrolytic refining, and relates to a method for improving the gold precipitation grade in the gold electrolytic refining process. Background technique [0002] The principle of gold electrolytic refining is: use pure gold with a gold content of more than 99.996% as the cathode, and use crude gold with a gold content of 92-98% as the anode. After the electrolyte is energized, the anode dissolves, and pure gold is precipitated at the cathode. . At present, in the production of gold electrolytic refining, there are many factors that affect the grade of gold precipitation, such as the grade of anode, the quality of the initial electrode sheet, and the composition of the electrolyte. [0003] Crude gold contains 3-8% silver and a small amount of copper, bismuth and platinum group metals. During the electrolysis process, the gold in the crude gold dissolves and enters the electrolyte in an ionic state ...

Claims

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Application Information

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IPC IPC(8): C25C1/20C25C7/04
Inventor 王银祥冯治兵周俊涛闫小军陈凯金鹏
Owner BAIYIN NONFERROUS GROUP
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