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Cyaniding tailings filling treatment technology

A treatment process, cyanide tailings technology, applied in the direction of oxidation treatment of sludge, sludge treatment, metallurgical wastewater treatment, etc., can solve the problems of environmental water pollution, human health ecosystem hazards, and surrounding environmental safety hazards, etc. Achieve obvious treatment effects, solve the effect of surrounding rock loosening and goaf subsidence, and solve potential safety hazards

Inactive Publication Date: 2019-05-14
FENY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the tailings leachate contains a large amount of cyanide, direct filling will inevitably cause pollution to the surrounding environment, especially the water environment, thereby causing serious harm to human health, animals and plants, and the entire ecosystem.
Due to historical reasons, a large number of cyanide tailings were not found a suitable solution at that time, and the tailings stockpiling scheme was adopted to dispose of these tailings, which brought great safety hazards to the surrounding environment.

Method used

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  • Cyaniding tailings filling treatment technology

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A kind of cyanide tailings filling process of the present invention, such as figure 1 shown, including the following steps:

[0026] (1) After the tailings slurry is transported to the mixing tank, lime is added and stirred evenly. The pH value of the slurry is adjusted to 11, and it is transported to the thickener through a pipeline. The pipeline is connected with a pipeline laminar flow mixer, and sodium hypochlorite is added to it. 0.3% of mass;

[0027] (2) After the treated pulp in step (1) enters the thickener, an anionic polyacrylamide with a molecular weight of 16 million and a mass concentration of 0.02% is added in an amount of 25g / t based on the dry tailings mass for flocculation and sedimentation , the overflow water is reused, and the underflow is transported to the mixer;

[0028] (3) Add cement and ferric chloride to the underflow of step (2), the amount of cement added is 10% of the mass of dry ore in the underflow, and the amount of ferric chloride is...

Embodiment 2

[0034] A kind of cyanide tailings filling process of the present invention, such as figure 1 shown, including the following steps:

[0035] (1) After the tailings slurry is transported to the mixing tank, lime is added and stirred evenly. The pH value of the slurry is adjusted to 12, and it is transported to the thickener through a pipeline. The pipeline is connected with a pipeline laminar flow mixer, and potassium hypochlorite is added to it. 0.5% of ore mass;

[0036] (2) Step (1) After the treated pulp enters the thickener, an anionic polyacrylamide with a molecular weight of 18 million and a mass concentration of 0.02% is added in an amount of 35g / t based on the dry tailings mass. Flocculation and sedimentation are carried out, the overflow water is reused, and the underflow is transported to the mixer;

[0037] (3) Add cement and ferrous sulfate to the mixer in the underflow of step (2). The amount of cement added is 15% of the dry ore mass in the underflow, and the am...

Embodiment 3

[0043] A kind of cyanide tailings filling process of the present invention, such as figure 1 shown, including the following steps:

[0044] (1) After the tailings slurry is transported to the mixing tank, lime is added and stirred evenly. The pH value of the slurry is adjusted to 13, and it is transported to the thickener through a pipeline. 0.8% of the dry ore mass;

[0045] (2) Step (1) After the treated pulp enters the thickener, an anionic polyacrylamide with a molecular weight of 18 million and a mass concentration of 0.02% is added in an amount of 50 g / t based on the dry tailings mass. Flocculation and sedimentation are carried out, the overflow water is reused, and the underflow is transported to the mixer;

[0046] (3) Add cement and iron sulfate to the underflow of step (2), the amount of cement added is 20% of the dry ore mass in the underflow, and the amount of ferric sulfate is 0.3% of the dry ore mass in the underflow, and the mixture is evenly stirred and trans...

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Abstract

The invention relates to a cyaniding tailings filling treatment technology. The technology comprises the following steps: (1) after conveying tailings slurry to a stirring tank, adding lime and uniformly stirring, and conveying to a thickener through a pipe, wherein the pipe is internally connected with a pipe laminar flow mixer, and an oxidizing agent is added; (2) after enabling treated ore pulpto enter the thickener, adding a flocculant to perform flocculating settling, recycling overflow water, conveying an underflow to a stirring machine; and (3) adding cement and a stabilizer to the underflow in the stirring machine, after uniformly stirring, and conveying to a mine worked out section for filling. Cyaniding tailings is sampled in different periods after treated by the above technology and cured in the mine worked out section, and a cured product is leached according to an HJ / T299-2007 method, wherein a pollutant content index in leachate is lower than a standard of GB5085.3-2007. The technology is short in process, remarkable in treatment effect, high in efficiency, and capable of solving a potential safety hazard of the cyaniding tailings piled and stored in a tailings pond.

Description

technical field [0001] The invention belongs to the field of solid waste treatment, and in particular relates to a process for filling and treating cyanide tailings. Background technique [0002] For a long time, gold ore leaching has been using the all-slime cyanidation method, and the cyanided tailings are concentrated and filtered and then discharged to the tailings pond for storage. A large number of cyanide-containing tailings occupy a large amount of land, and there are risks such as water source and soil pollution. From the perspective of environmental protection, these gold tailings must be treated to avoid secondary pollution. With the development of the filling mining method, filling the cyanide tailings may be an effective method. However, because the tailings leachate contains a large amount of cyanide, direct filling will inevitably cause pollution to the surrounding environment, especially the water environment, thereby causing serious harm to human health, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/06C02F11/147C02F101/10C02F101/18C02F101/20C02F103/16
Inventor 曹兴
Owner FENY