A method for enriching and separating lead-zinc mixed concentrate from gold concentrate cyanidation tailings

A technology for cyaniding tailings and mixed concentrates, applied in separation methods, chemical instruments and methods, filtration and separation, etc., can solve the problems of not obtaining copper concentrates, zinc concentrates, copper-zinc concentrates, etc., and achieve improvement The effect of comprehensive utilization and reduction of waste of resources

Active Publication Date: 2019-11-26
SHANDONG GUODA GOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent only recovers lead concentrate and copper-zinc concentrate from cyanide tailings, but does not separate copper-zinc concentrate, resulting in no corresponding copper concentrate and zinc concentrate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Slurry the gold concentrate cyanidation tailings containing 8wt% lead and 10wt% zinc with system water, the slurry concentration is 10wt%, and add a compound leaching agent to the slurry to further extract the gold concentrate cyanide tailings The gold, silver and copper in the compound type leaching agent is made of ammonia water, ammonium carbonate, and ammonium bicarbonate in a weight ratio of 2:2:1. The addition amount of the compound type leaching agent is 0.40% of the filter cake mass, and the leaching temperature is controlled at 40 ℃, the leaching time is 8 hours. After the leaching is completed, the system passes through a plate and frame filter press to obtain filtrate and filter cake. After the filtrate is replaced by zinc powder to recover valuable metals, it is system water, and it is returned to the pulping process for recycling. The filter cake is Cyanide tailings after extraction of gold, silver and copper;

[0025] 2) Slurry the cyanide tailings afte...

Embodiment 2

[0028]1) Slurry the gold concentrate cyanidation tailings containing 9wt% lead and 13wt% zinc with system water at a concentration of 10wt%, and add a compound leaching agent to the slurry to further extract the gold concentrate cyanide tailings The gold, silver and copper in the compound type leaching agent is prepared from ammonia water, ammonium carbonate, and ammonium bicarbonate in a weight ratio of 2:2:1. The addition amount of the compound type leaching agent is 0.50% of the filter cake mass, and the leaching temperature is controlled at 50 ℃, the leaching time is 10 hours. After the leaching is completed, the system passes through a plate and frame filter press to obtain filtrate and filter cake. After the filtrate is replaced by zinc powder to recover valuable metals, it is system water, and it is returned to the pulping process for recycling. The filter cake is Cyanide tailings after extraction of gold, silver and copper;

[0029] 2) Slurry the cyanide tailings after...

Embodiment 3

[0032] 1) Slurry the gold concentrate cyanidation tailings containing 10wt% lead and 15wt% zinc with system water, the slurry concentration is 30wt%, and add a compound leaching agent to the slurry to further extract the gold concentrate cyanide tailings The gold, silver and copper in the compound type leaching agent is made of ammonia water, ammonium carbonate, and ammonium bicarbonate in a weight ratio of 2:2:1. The addition amount of the compound type leaching agent is 0.60% of the filter cake mass, and the leaching temperature is controlled at 60 ℃, the leaching time is 12 hours. After the leaching is completed, the system passes through a plate and frame filter press to obtain filtrate and filter cake. After the filtrate is replaced by zinc powder to recover valuable metals, it becomes system water, and it is returned to the pulping process for recycling. The filter cake is Cyanide tailings after extraction of gold, silver and copper;

[0033] 2) Slurry the cyanide tailin...

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PUM

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Abstract

The invention relates to a method for enriching and separating lead and zinc mixed concentrates from gold concentrate cyaniding tailings. The method comprises the following steps: 1) enrichment of thelead and zinc mixed concentrates: cyaniding tailings are pulped by using water after extraction of gold, silver and copper; then, an activating agent is added in the pulp for stirring and activatingby 20-40 min; isopropyl ethyl thiamate is added for flotation; the flotated concentrates are the lead and zinc mixed concentrates; and the remains are sulfur concentrates; and 2) separation of the lead and zinc mixed concentrates: the lead and zinc mixed concentrates are pressed, filtered and dehydrated to prepare filter cakes; the filter cakes are mixed with the water for pulping; activated carbons, zinc sulfate and sodium thiosulfate are added in the pulp for stirring by 90-120 min to inhibit zinc; finally, ethyl nitrogen is added for flotation; the flotated matters are lead concentrates; and the remains are zinc concentrates. The method can further effectively recover gold, silver and copper from the gold concentrate cyaniding tailings, improves comprehensive utilization of resources, and reduces resource wastes.

Description

technical field [0001] The invention relates to a method for enriching and separating lead-zinc mixed concentrate from gold concentrate cyanidation tailings, which belongs to the technical field of gold smelting and flotation beneficiation, and relates to the technical field of comprehensive utilization of smelting tailings resources. Background technique [0002] In the gold concentrate suitable for direct cyanidation system treatment (referring to gold ore with an average gold grade of 50-60g / t), in addition to gold and silver, it also contains a certain amount of valuable metals such as copper, lead, and zinc. Due to the regional differences of gold concentrates and their complex sources, the contents of lead and zinc in gold concentrates are different. The high lead content can reach about 10%, and the high zinc content can reach about 15%. In the prior art, after the gold concentrate is directly cyanided to extract gold and silver, the cyanidation tailings are successiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/018B03D101/00B03D101/06B03D103/04B01D25/21
CPCB01D25/21B03D1/018B03D2201/00B03D2201/06B03D2203/025B03D2203/04
Inventor 徐永祥王建政孙德茂孔令强朱德兵张源源郭建东
Owner SHANDONG GUODA GOLD
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