Environment-friendly gold extraction method for adsorbing and desorbing resin after gold extraction

A resin adsorption and environmental protection technology, applied in the improvement of process efficiency, photography process, instruments and other directions, can solve the problems of deterioration of technical and economic indicators of complex ores, influence of activated carbon adsorption effect, low equipment utilization efficiency, etc., to achieve convenient and concise regeneration process, The effect of reducing grinding operation cost and low cost

Inactive Publication Date: 2018-09-11
甘肃省合作早子沟金矿有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are three major defects in the cyanide used in the cyanidation process: 1. It is highly toxic, seriously endangers the lives of humans and animals, pollutes the ecological environment, and has no development prospects at all; 2. The technical and economic indicators of complex ores deteriorate, which is different from my country The characteristics of gold ore and the changing trend of the world's gold resources are extremely inconsistent; 3, the leaching speed is slow, the cycle of operation is naturally long, and the utilization efficiency of equipment is just very low; ) research has great economic and environmental ecological significance
[0006] At present, the gold extraction process is relatively coarse ore, and the loss in the process is relatively large
Activated carbon can selectively adsorb gold and silver, but in actual production, it is easily affected by various factors such as flocculant wrapping, so the adsorption effect of activated carbon is greatly affected, and the adsorption capacity decreases.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The number of gold flotation tailings used in this example is A1, its gold content is 1.15g / t, and 1000 tons are used in Example 1.

[0035] First, screen the tailings slurry after flotation in the concentrator to remove impurities in the tailings, and then use a concentrator to concentrate to obtain an underflow slurry concentration of 42%; the underflow slurry is readjusted with the filtrate produced in the following steps pulp to obtain primary pulp with a primary pulp concentration of 35%; in the above steps, the filtrate is used to replace water to adjust the slurry with water in the stirring tank, or water and the first filtrate are used for slurry adjustment at the same time, so that the first filtrate can be fully recovered of valuable metals.

[0036] Add lime to the primary pulp to adjust the pH value to 10-11, then add an environmentally friendly gold extracting agent for leaching, the amount of the environmentally friendly gold extracting agent added during ...

Embodiment 2

[0041] The number of gold flotation tailings used in this example is A2, its gold content is 1.05g / t, and 1000 tons are used in Example 2.

[0042] First, screen the tailings slurry after flotation in the concentrator to remove impurities in the tailings, and then use a concentrator to concentrate to obtain an underflow slurry concentration of 43%; the underflow slurry is readjusted with the filtrate produced in the following steps pulp to obtain primary pulp with a primary pulp concentration of 37%; in the above steps, use the filtrate to replace water to adjust the slurry with water in the stirring tank, or use water and the first filtrate to adjust the slurry at the same time, so that the first filtrate can be fully recovered of valuable metals.

[0043] Add lime to the primary pulp to adjust the pH value to 10-11, then add an environmentally friendly gold extracting agent for leaching, the amount of the environmentally friendly gold extracting agent added during the leachi...

Embodiment 3

[0048] The number of gold flotation tailings used in this example is A3, its gold content is 0.95g / t, and 1000 tons are used in Example 3.

[0049] First, screen the tailings slurry after flotation in the concentrator to remove impurities in the tailings, and then use a concentrator to concentrate to obtain an underflow slurry concentration of 42%; the underflow slurry is readjusted with the filtrate produced in the following steps pulp to obtain primary pulp with a primary pulp concentration of 39%; in the above steps, the filtrate is used to replace water to adjust the slurry with water in the stirring tank, or water and the first filtrate are used simultaneously for slurry adjustment, so that the first filtrate can be fully recovered of valuable metals.

[0050] Add lime to the primary pulp to adjust the pH value to 10-11, then add an environmentally friendly gold extracting agent for leaching, the amount of the environmentally friendly gold extracting agent added during th...

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Abstract

The invention relates to an environment-friendly gold extraction method for adsorbing and desorbing resin after gold extraction. The environment-friendly gold extraction method comprises the followingsteps: sieving tailings pulp after floatation in a concentrating mill to remove impurities in the tailings, and then carrying out concentration to obtain first overflow fluid and underflow ore pulp;mixing the ore pulp again on the underflow ore pulp to obtain primary ore pulp; adding an environment-friendly gold extraction reagent into the primary ore pulp for leaching; concentrating the leachedore pulp with a deep-cone thickener and then carrying out press filtration to obtain pregnant solution and filter cakes; adding resin into the returned pregnant solution to adsorb gold, and stackingthe filter cakes; mixing the adsorbed barren liquor for pulp mixing recycling; and desorbing and electrolyzing the resin then to obtain gold mud. The method is a wet process reaction process which issimple to operate, low in cost, pollution-free, low in construction and transformation cost and easy to implement.

Description

technical field [0001] The invention relates to the technical field of gold recovery, and more specifically relates to a method for extracting gold by resin adsorption and desorption after environmental-friendly gold extraction from flotation tailings. Background technique [0002] At present, most of the gold in the world is extracted by cyanidation. However, there are three major defects in the cyanide used in the cyanidation process: 1. It is highly toxic, seriously endangers the lives of humans and animals, pollutes the ecological environment, and has no development prospects at all; 2. The technical and economic indicators of complex ores deteriorate, which is different from my country The characteristics of gold ore and the changing trend of the world's gold resources are extremely inconsistent; 3, the leaching speed is slow, the cycle of operation is naturally long, and the utilization efficiency of equipment is just very low; ) research has great economic and environm...

Claims

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Application Information

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IPC IPC(8): C22B3/04C22B3/22C22B3/24C22B11/00C25C1/20
CPCC22B3/04C22B3/22C22B3/24C22B11/04C25C1/20Y02P10/20
Inventor 王春光姜桂鹏刘新刚刘金松李建行彭剑平
Owner 甘肃省合作早子沟金矿有限责任公司
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