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Treatment method for tailing slags in cyanide tailings pond

A treatment method and technology for cyanide tailings, which are applied in the field of solid waste treatment and tailings slag treatment of cyanide tailings pond, can solve the problem of high treatment cost, and achieve the effects of low operating cost, good treatment effect and low investment cost.

Active Publication Date: 2018-12-18
CHANGCHUN GOLD RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for treating tailings slag in a cyanidation tailings pond to solve the problem of high processing costs in the currently used alkali chlorine method and the Inco method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Include the following steps:

[0020] (1) Turning: turning the tailings slag of the tailings pond to be processed;

[0021] (2) Drying: the tailings slag after turning over is carried out layered drying, the thickness of each layer of drying is 50mm, the drying time is 20 days, and the tailings slag moisture content is 6% after drying;

[0022] (3) Shifting: transfer the dried tailings slag layer by layer to the area to be treated;

[0023] (4) pulping treatment: the tailings slag in the area to be treated is placed in the mixing tank and water is added for pulping, and the tailings slag pulping concentration is 40%;

[0024] (5) Advanced treatment: add hydrogen peroxide, phosphoric acid and copper sulfate to the tailings slurry for advanced treatment. The molar ratio of hydrogen peroxide, phosphoric acid, copper sulfate and cyanide in the tailings slurry is 2:1:0.01:1. After mixing evenly, add it to the tailings slurry in liquid form, the addition amount is 1mL / L, an...

Embodiment 2

[0028] Include the following steps:

[0029] (1) Turning: turning the tailings slag of the tailings pond to be processed;

[0030] (2) drying: the tailings slag after turning over is carried out layered drying, the thickness of each layer of drying is 300mm, the drying time is 60 days, and the tailings slag moisture content is 10% after drying;

[0031] (3) Shifting: transfer the dried tailings slag layer by layer to the area to be treated;

[0032] (4) pulping treatment: the tailings slag in the area to be treated is placed in the mixing tank and water is added for pulping, and the tailings slag pulping concentration is 45%;

[0033] (5) Advanced treatment: add hydrogen peroxide, phosphoric acid and copper sulfate to the tailings slurry for advanced treatment. The molar ratio of hydrogen peroxide, phosphoric acid, copper sulfate and cyanide in the tailings slurry is 4.5:2:0.25:1. After mixing evenly, add it to the tailings slurry in liquid form, the addition amount is 50mL / ...

Embodiment 3

[0037] Include the following steps:

[0038] (1) Turning: turning the tailings slag of the tailings pond to be processed;

[0039] (2) Drying: the tailings slag after turning over is carried out layered drying, the thickness of each layer of drying is 500mm, the drying time is 90 days, and the moisture content of the tailings slag after drying is 15%;

[0040] (3) Shifting: transfer the dried tailings slag layer by layer to the area to be treated;

[0041] (4) pulping treatment: the tailings slag in the area to be treated is placed in the mixing tank and water is added for pulping, and the tailings slag pulping concentration is 50%;

[0042] (5) Advanced treatment: add hydrogen peroxide, phosphoric acid and copper sulfate to the tailings slurry for advanced treatment. The molar ratio of hydrogen peroxide, phosphoric acid, copper sulfate and cyanide in the tailings slurry is 7:3:0.5:1. After mixing evenly, add it to the tailings slurry in liquid form, the addition amount is 1...

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Abstract

The invention relates to a treatment method for tailing slags in a cyanide tailings pond, belonging to a solid waste treatment method in the field of environmental protection. The method comprises: turning: the to-be-treated tailing slags of the tailings pond are turned over, layered and dried, transferred to an area to be treated, and placed in a stirred tank; water is added for slurrying; a cyanide decomposition agent is added for advanced treatment; mixed chemicals are added for stable immobilization treatment; and thickening is carried out in a thick machine or filter pressing is carried out in a filter press. The invention has the beneficial effects: according to the tailing slag accumulation characteristics of the cyanide tailings pond, the in-situ enhanced natural degradation and the different-site slurrying deep treatment are combined to reduce the content of cyanide and heavy metals in the tailing slags, and then conditions are created for the cyanide tailing slag backfillingand other resource utilization with the advantages of low investment cost, low operating cost, good treatment effect, and broad application prospects.

Description

technical field [0001] The invention relates to a solid waste treatment method in the field of environmental protection, in particular to a treatment method for cyanide tailings slag tailings. Background technique [0002] Because most of the gold mines in my country have been using cyanidation gold extraction process, a large amount of cyanide-containing tailings slag is accumulated in the tailings pond during the gold production process. With the expansion of gold production scale and the extension of mining history, the cyanide-containing tailings slag The amount of accumulation is increasing year by year, occupying a large amount of land. Because these tailings slags contain highly toxic substances - cyanide, they have become a common hazardous waste in gold mining enterprises. The cyanide in the slag will pollute the surrounding environment and groundwater due to the infiltration of rain. As the domestic environmental protection situation is becoming increasingly severe,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00A62D3/30
CPCA62D3/30B09B3/00
Inventor 刘强李哲浩张宇
Owner CHANGCHUN GOLD RES INST
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