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Method for recovery of gold and copper from flotation tailings and solidification treatment

A technology for flotation tailings and recovery of gold, applied in flotation, solid separation, etc., can solve the problems of excessive heavy metal content in the soil, complex and difficult separation, low recovery rate, etc., to reduce the cost of chemicals, strong application and saving resource effect

Active Publication Date: 2018-10-16
任开有 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Tailings are the slag left after the extraction of the raw ore during the mining process, which is usually stacked. However, due to the heavy metals contained in the slag, such as lead, zinc, nickel, cadmium, chromium, mercury, and arsenic, the slag is It is very easy to cause the heavy metal content in the nearby soil to exceed the standard, and a large number of crops will die, and the dust will be scattered into the air during the slag stacking process, and the heavy metals in it will also easily cause harm to the human body.
[0003] In addition, the valuable metal elements in common tailings are of low grade, complex and difficult to select, and the accumulation time is long, and the degree of peroxidation on the mineral surface is high
If the traditional copper sulfate activation-direct flotation method and other technologies are used, the recovery rates of gold and copper are not high, and the specific performances are: 1. The flotation speed is slow, the flotation time is long, and the recovery rate is low; , leading to a large floating amount of ore slime and flotable gangue, and a low flotation enrichment ratio; 3. The amount of flotation reagents is large, and the cost of beneficiation reagents is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A. Grind the tailings to a fineness of -200 mesh, accounting for 80%, and adjust the mass concentration of the pulp to 45%;

[0015] B. Stir the slurry in step A, add 800g of inhibitor water glass, 150g of collector DF-353, 80g of butyl xanthate + ethiazide (1:1), 60g of terpineol oil per ton of tailings , through conventional flotation to obtain recovered concentrate and tailings slurry;

[0016] C. Concentrate the tailings slurry in step B to a concentrated slurry with a concentration of 70% as usual, and then add a coagulant (0.5kg of alum, 9.5kg of cement) to the concentrated slurry in the amount of 10kg of coagulant per ton of concentrated slurry, And continue to stir for 8 minutes, then stockpile according to the routine, promptly finish recovering gold copper and coagulation treatment.

[0017] In this example, gold and copper enter the recovery concentrate, and the recovery rate of gold can reach 68%, and the recovery rate of copper can reach 80%. The heavy me...

Embodiment 2

[0019] A. Grind the tailings to a fineness of -200 mesh, accounting for 80%, and adjust the mass concentration of the pulp to 40%;

[0020] B. Stir the slurry in step A, add 700g of inhibitor water glass, 100g of collector DF-353, 70g of butyl xanthate + ethion (1:1), 50g of terpineol oil per ton of tailings , through conventional flotation to obtain recovered concentrate and tailings slurry;

[0021] C. Concentrate the tailings slurry in step B to a concentrated slurry with a concentration of 65% as usual, and then add a coagulant (0.5kg of alum, 5.5kg of cement) to the concentrated slurry according to the amount of 6kg of coagulant per ton of concentrated slurry, And continue to stir for 5 minutes, then stockpile according to the routine, promptly complete recovery of gold and copper and solidification treatment.

[0022] In this example, gold and copper enter the recovery concentrate, and the recovery rate of gold can reach 67%, and the recovery rate of copper can reach 80...

Embodiment 3

[0024] A. Grind the tailings to a fineness of -200 mesh, accounting for 80%, and adjust the mass concentration of the pulp to 50%;

[0025] B. Stir the slurry in step A, add 900g of inhibitor water glass, 200g of collector DF-353, 90g of butyl xanthate + ethylthiazide (1:1), 70g of terpineol oil per ton of tailings , through conventional flotation to obtain recovered concentrate and tailings slurry;

[0026] C. Concentrate the tailings slurry in step B to a concentrated slurry with a concentration of 75% as usual, and then add a coagulant (0.5kg of alum, 14.5kg of cement) to the concentrated slurry according to the amount of 15kg of coagulant per ton of concentrated slurry, And continue to stir for 10 minutes, then stockpile according to the routine, promptly complete recovery of gold and copper and solidification treatment.

[0027] In this example, gold and copper enter the recovery concentrate, and the recovery rate of gold can reach 68%, and the recovery rate of copper ca...

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PUM

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Abstract

The invention discloses a method for recycling gold and copper from flotation tailings and performing solidification treatment. The method comprises the following steps of: grinding tailings until tailings with finesses of 200 meshes account for 80%, and regulating mass concentration of ore pulp; under stirring, adding an inhibitor (sodium silicate), a collecting agent DF-353, butyl xanthate+ethyl thio carbamate and terpenic oil into the ore pulp in proportion, and performing conventional flotation to obtain recycled concentrate and tailing plug; regularly concentrating tailings pulp, adding a coagulator into the concentrated tailings pulp, continuously stirring, and performing regular stockpiling. The method disclosed by the invention greatly increases a recovery rate of gold and copper in tailings, reduces drug cost and saves resources. Gold and copper enter the recycled concentrate, so that the gold recovery rate can reach 68%, and the copper recovery rate can reach 80%. Heavy metal of stockpiled tailings treated by the coagulator does not enter soil and a water body any more, is free of scattering dust, and does not enter air. The method provided by the invention is energy-saving and environmentally friendly, and is easy to operate, so that environment nearby a flotation ore plant is protected, and popularization applicability is strong.

Description

technical field [0001] The invention belongs to the technical field of mineral flotation technology, and relates to a method for recovering gold and copper from flotation tailings and solidification treatment. Background technique [0002] Tailings are the slag left after the extraction of the raw ore during the mining process, which is usually stacked. However, due to the heavy metals contained in the slag, such as lead, zinc, nickel, cadmium, chromium, mercury, and arsenic, the slag is It is very easy to cause the heavy metal content in the nearby soil to exceed the standard, and a large number of crops will die, and the dust will be scattered into the air during the slag stacking process, and the heavy metals in it will also easily cause harm to the human body. [0003] In addition, the valuable metal elements in the common tailings are of low grade, complex and difficult to select, and the accumulation time is long, and the degree of peroxidation on the mineral surface i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00B03B1/00B03D1/002
CPCB03B1/00B03D1/00B03D1/002B03D2201/002
Inventor 任开有任科显
Owner 任开有