Method for achieving gold replacement through chemical precipitation method

A chemical precipitation method and ore pulp technology, applied in the direction of improving process efficiency, can solve the problems of low flotation recovery rate, large production scale, low recovery rate, etc., and achieve the effect of filling technical gaps, low cost, and improving leaching rate.

Inactive Publication Date: 2018-12-07
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

Most of these difficult-to-treat gold mines are due to the occurrence of fine gold particles and serious mineral muddying. If the gold is directly extracted by cyanidation, the minerals need to be pretreated, the production scale is large, and there are high costs and recycling. Low efficiency, serious environmental pollution and other problems; if the minerals are flotation, the flotation recovery rate is low, and a certain amount of gold in the flotation tailings cannot be enriched. If the tailings are directly put into the tailings, it will cause a waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 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. 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.

[0026] Add lime to the primary pulp to adjust the pH value to 10, and then add an environmentally friendly gold extracting agent for leaching. The amount of the environmentally friendly gold extracting agent added during the leac...

Embodiment 2

[0033] 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.

[0034] 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 44%; the underflow slurry is readjusted with the filtrate produced in the following steps pulp to obtain primary pulp with a primary pulp concentration of 36%; 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.

[0035] Add lime to the primary pulp to adjust the pH value to 10, and then add an environmentally friendly gold extracting agent for leaching. The amount of the environmentally friendly gold extracting agent added during...

Embodiment 3

[0042] The number of gold flotation tailings used in this example is A3, its gold content is 1.00g / t, 1000 tons are used in Example 3.

[0043] 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 45%; the underflow slurry is readjusted with the filtrate produced in the following steps pulp to obtain primary pulp with a primary pulp concentration of 38%; 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.

[0044] Add lime to the primary pulp to adjust the pH value to 10, and then add an environmentally friendly gold extracting agent for leaching. The amount of the environmentally friendly gold extracting agent added during the l...

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PUM

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Abstract

The method relates to a method for achieving gold replacement through a chemical precipitation method. The method comprises the following steps that tailing pulp obtained after flotation is screened,impurities are removed, then concentration is carried out, and first overflow liquid and underflow pulp are obtained; the underflow pulp is adjusted again, and primary pulp is obtained; lime is addedinto the primary pulp to adjust PH to range from 9 to 11, an environment-friendly gold extraction agent is added for leaching, and pulp obtained after leaching is obtained; the pulp obtained after leaching is subjected to concentration and filter pressing through a thickener, second overflow liquid, filter liquid and filter cakes are obtained, and after the second overflow liquid and the filter liquid are mixed, gold containing previous liquid is obtained; sulfuric acid, ferric sulfate, copper sulfate and sodium sulfide are added into the gold containing previous liquid to achieve gold replacement through the chemical precipitation method to obtain barren liquid; and the barren liquid is subjected to filter pressing, and gold concentrate powder filter cakes and filter liquid are obtained.The method is a wet reaction process and is simple in operation, low in cost, free of pollution, low in building and modification cost and easy to implement.

Description

technical field [0001] The invention relates to the technical field of gold recovery, in particular to a method for replacing gold from gold-containing precious liquid by chemical precipitation. Background technique [0002] At present, my country has become the world's largest gold producer and the third gold consumer. With the development and utilization of gold resources, my country's easy-to-handle gold resources are gradually decreasing. The country currently has a large number of difficult-to-handle gold resources, and its reserves are about It accounts for one-third of my country's gold resource reserves. Most of these difficult-to-treat gold mines are due to the occurrence of fine gold particles and serious mineral muddying. If the gold is directly extracted by cyanidation, the minerals need to be pretreated, the production scale is large, and there are high costs and recycling. Low efficiency, serious environmental pollution and other problems; if the minerals are f...

Claims

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Application Information

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IPC IPC(8): C22B3/04C22B3/46C22B11/00
CPCC22B3/04C22B3/46C22B11/04Y02P10/20
Inventor 姜桂鹏于明海刘金松张君林吴锋高军雷
Owner 甘肃省合作早子沟金矿有限责任公司
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