Process method for sufficiently recycling precious metal from copper dross and copper matte

A process method and precious metal technology, which is applied in the field of precious gold recycling, can solve the problems of enterprise profit loss and other problems, and achieve the effects of low cost, simple process principle, and simple and convenient operation

Inactive Publication Date: 2015-12-09
HUNAN JINWANG BISMUTH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since lead production enterprises generally do not have the process of smelting blister copper, they can only sell matte outside. The higher gold and silver content in matte is sold at a discount, which leads to the loss of corporate profits.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0012] Embodiment: A kind of technological method of fully reclaiming copper scum matte precious metal adopts the following measures to implement: after the copper scum is reduced and smelted into copper matte and crude lead by adding soda ash during smelting, the surface slag is placed Then release the rough lead with higher silver content through the bottom lead port. Generally, the rough lead does not need to be drained, leaving a layer of bottom lead accounting for 5-20% of the total mass to prevent the matte from condensing on the bottom of the furnace, and then add high For the refining of lead refining slag with low lead and silver content, soda ash is added to the output high-grade lead oxidation refining slag; at the same time, pulverized coal and iron filings are added for reduction smelting. Since the silver content of lead oxidation refining slag is very low, the crude The silver content in lead will be greatly reduced, and the crude lead will take a large amount of...

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Abstract

The invention relates to a process method for sufficiently recycling precious metal from copper dross and copper matte and belongs to the technical field of precious metal recycle. The process method comprises the steps that when the copper dross is smelted through a reverberatory furnace, sodium carbonate is added firstly, and the copper dross is reduced and smelted into the copper matte and wet lead; surface slags are discharged; then most wet lead is discharged; a layer of base lead is left, high-lead and low-silver lead refining slags are added for refining, and high-grade lead oxidation refining slags are obtained; and the sodium carbonate is added again, powdered coal and scrap iron are added for conducting reduction smelting, and a large amount of gold and a large amount of silver enter the base lead. By means of the process method, the content of gold and silver in the copper matte can be reduced, the precious metal is made to enter the wet lead for conducting electrolytic recovery again, and it is guaranteed that valuable metal can be recycled sufficiently by enterprises.

Description

technical field [0001] The invention relates to a process method for fully recovering copper scum matte precious metal, belonging to the technical field of precious gold recovery. Background technique [0002] When the copper scum of the lead electrolysis plant is smelted through the reverberatory furnace, if the silver content in the scum is high, the gold and silver content in the matte will be high. Since lead production enterprises generally do not have the process of smelting blister copper, they can only sell matte outside. The higher gold and silver content in matte is sold at a discount, which leads to the loss of corporate profits. Contents of the invention [0003] The technical problem to be solved in the present invention is to address the above-mentioned shortcomings of the existing technology, and propose a process method for fully recovering copper scum matte precious metals, so as to reduce the gold and silver content in the matte, so that the precious meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/00C22B7/04C22B15/00C22B13/02
CPCY02P10/20
Inventor 甘学龙肖辉王志雄吴祖祥周贱华
Owner HUNAN JINWANG BISMUTH
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