Method for recovering zinc from liquid obtained by calcining, acid leaching and copper extraction of gold concentrate containing zinc and copper

A gold concentrate and acid leaching technology, applied in the field of further recovery of zinc, can solve the problems of waste of resources and no recycling, and achieve the effect of increasing the economic benefits of enterprises and improving the utilization rate of resources.

Inactive Publication Date: 2012-04-04
SHANDONG GUODA GOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the liquid after copper extraction is generally treated by lime neutralization method, and the neutralized liquid is filtered and then returned to the production system, and the neutralized slag is piled up after pressure filtration, and the valuable metal zinc is not recycled, wasting precious resources

Method used

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  • Method for recovering zinc from liquid obtained by calcining, acid leaching and copper extraction of gold concentrate containing zinc and copper
  • Method for recovering zinc from liquid obtained by calcining, acid leaching and copper extraction of gold concentrate containing zinc and copper
  • Method for recovering zinc from liquid obtained by calcining, acid leaching and copper extraction of gold concentrate containing zinc and copper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for recovering zinc from the solution of zinc-containing copper-gold concentrate roasted and acid leached to extract copper in this embodiment includes the following steps: after the zinc-containing copper-gold concentrate is roasted, the hot calcine is transported to the acid leaching tank by a drum , use the temperature of the hot calcined sand to control the acid leaching temperature at 80-90°C, add sulfuric acid, control the concentration of sulfuric acid to 25g / l, pass through three series-connected acid leaching tanks, stir and leaching for 5 hours, after acid leaching, the pulp is passed through a concentrator and vacuum filtration Machine-liquid-solid separation to obtain zinc-containing copper acid leaching solution and gold and silver-containing solid materials. The zinc-containing copper acid leaching solution passes through the extraction device and the electrowinning device to produce cathode copper. After extracting copper, the solution is pumped in...

Embodiment 2

[0020] A method for recovering zinc from the solution of zinc-containing copper-gold concentrate roasted and acid leached to extract copper in this embodiment includes the following steps: after the zinc-containing copper-gold concentrate is roasted, the hot calcine is transported to the acid leaching tank by a drum , use the temperature of the hot calcined sand to control the acid leaching temperature at 85°C, add sulfuric acid, control the concentration of sulfuric acid to 30g / l, pass through three acid leaching tanks in series, stir and leaching for 6 hours, after acid leaching, the pulp is passed through the concentrator and vacuum filter liquid Solid separation, to obtain zinc-containing copper acid leaching solution and gold and silver-containing solid materials, zinc-containing copper acid leaching solution passes through extraction device and electrowinning device to produce cathode copper; after extracting copper, the liquid is pumped into the lime neutralization tank t...

Embodiment 3

[0024] A method for recovering zinc from the solution of zinc-containing copper-gold concentrate roasted and acid leached to extract copper in this embodiment includes the following steps: after the zinc-containing copper-gold concentrate is roasted, the hot calcine is transported to the acid leaching tank by a drum , use the temperature of the hot calcined sand to control the acid leaching temperature at 90°C, add sulfuric acid, control the concentration of sulfuric acid to 35g / l, pass through three acid leaching tanks in series, stir and leaching for 7 hours, after acid leaching, the pulp is passed through a concentrator and a vacuum filter liquid Solid separation, to obtain zinc-containing copper acid leaching solution and gold and silver-containing solid materials, zinc-containing copper acid leaching solution passes through extraction device and electrowinning device to produce cathode copper; after extracting copper, the liquid is pumped into the lime neutralization tank t...

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Abstract

The invention relates to a method for recovering zinc from liquid obtained by calcining, acid leaching and copper extraction of gold concentrate containing zinc and copper, and belongs to the technical field of production processes for recovering zinc from the liquid obtained by calcining, acid leaching and copper extraction in metallurgical chemical industries. The method comprises the following steps of: performing acid leaching, extracting, extracting the copper by electrodeposition and adding sodium sulfide into zinc-containing filtrate to precipitate zinc. The method is simple and practicable; and the zinc serving as a valuable metal is recovered while valuable metals such as gold, silver, the copper and sulfur are recovered fully in a process for calcining gold concentrates, so multielement gold-containing gold concentrate resources are utilized effectively, wastes are turned into wealth, the utilization rate of the resources is improved further and the economic benefits of enterprises are increased.

Description

technical field [0001] The invention relates to a method for further recovering zinc from liquid after copper extraction by roasting acid leaching extraction of zinc-containing copper-gold concentrate, and belongs to the technical field of production technology for recovering zinc from liquid after roasting acid leaching extraction copper extraction in metallurgy and chemical industry. Background technique [0002] At present, zinc-containing copper-gold concentrate adopts roasting and acid leaching process. The acid leaching solution contains zinc, copper and other metals. After extracting copper by extraction and electrowinning, cathode copper is obtained, and the liquid after extracting copper is raffinate, and the zinc content is 3000. --4000mg / l. At present, the liquid after copper extraction is generally treated by lime neutralization method, and the neutralized liquid is filtered and then returned to the production system, and the neutralized slag is piled up after pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/44C22B19/30C22B15/00C22B11/00
CPCY02P10/20
Inventor 徐永祥吕寿明韩玉石林清岩
Owner SHANDONG GUODA GOLD
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