Method for treating cyanide in cyanidation slag

A treatment method and technology of cyanide tailings, which are applied in chemical instruments and methods, solid waste removal, transportation and packaging, etc., can solve the problems of high cyanide content in cyanide tailings, environmental pollution impact, etc. Small footprint, universal applicability, effectiveness in reducing cyanide content

Inactive Publication Date: 2018-03-13
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 cyanide in cyanide tailings to solve the problem that the cyanide content in the cyanide tailings in the gold industry is high and has a great pollution impact on the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Include the following steps:

[0016] (1) Pump the cyanide tailings slurry into a filter press with filter press washing and air-drying function for pressing treatment, and the filter press filtrate is reused in the production process of the enterprise;

[0017] (2) Start the air-drying function of the filter press, press high-pressure air into the filter cavity of the filter press under the pressure of 0.6Mpa, and perform air-drying treatment on the filter cake, and the air-drying time is controlled at 1min;

[0018] (3) Start the washing function of the filter press, inject the washing hydraulic pressure into the filter cavity of the filter press under the pressure of 0.6Mpa, and wash the filter cake of the press filter, and the water washing ratio is controlled at 0.1;

[0019] (4) After washing, start the air-drying function of the filter press, press high-pressure air into the filter cavity of the filter press under the pressure of 0.6Mpa, and perform air-drying tr...

Embodiment 2

[0025] Include the following steps:

[0026] (1) Pump the cyanide tailings slurry into a filter press with filter press washing and air-drying function for pressing treatment, and the filter press filtrate is reused in the production process of the enterprise;

[0027] (2) Start the air-drying function of the filter press, press high-pressure air into the filter cavity of the filter press under the pressure of 0.9Mpa, and perform air-drying treatment on the filter cake, and the air-drying time is controlled at 8 minutes;

[0028] (3) Start the washing function of the filter press, inject the washing hydraulic pressure into the filter chamber of the filter press under the pressure of 0.9Mpa, and wash the filter cake of the press filter, and the water washing ratio is controlled at 1.0;

[0029] (4) After washing, start the air-drying function of the filter press, press high-pressure air into the filter chamber of the filter press under the pressure of 0.9Mpa, and perform air-dr...

Embodiment 3

[0035] Include the following steps:

[0036] (1) Pump the cyanide tailings slurry into a filter press with filter press washing and air-drying function for pressing treatment, and the filter press filtrate is reused in the production process of the enterprise;

[0037] (2) Start the air-drying function of the filter press, press high-pressure air into the filter cavity of the filter press under the pressure of 1.2Mpa, and perform air-drying treatment on the filter cake, and the air-drying time is controlled at 15 minutes;

[0038] (3) Start the washing function of the filter press, inject the washing hydraulic pressure into the filter cavity of the filter press under the pressure of 1.2Mpa, and wash the filter cake of the press filter, and the water washing ratio is controlled at 2.0;

[0039] (4) After washing, start the air-drying function of the filter press, press high-pressure air into the filter cavity of the filter press under the pressure of 1.2Mpa, and perform air-dry...

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PUM

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Abstract

The invention relates to a method for treating cyanide in cyanidation slag, and belongs to a pollutant treating method in the environment-friendly field. A cyaniding tailing pulp is pumped into a pressure filter machine with the pressure filter washing air drying function to be subject to squeezing treatment, the pressure filter air drying function is started, the pressure filter washing functionis started, and a filter cake generated after pressure filter can meet the treatment requirement. The method aims at solving the problem that a large amount of toxic substance cyanide is contained inthe gold mine cyanidation slag, and great safety and environment-friendly hidden danger to the surrounding environment is generated. The solubility equilibrium principle is used, through washing treatment, the cyanide in the cyanidation slag reaches the B-stage standard (the content of the total cyanide is smaller than 8 mg/kg) in the exhibition site soil environment quality evaluation criterion.Compared with a traditional cyanidation slag innocent treatment method, the method has the beneficial effects of being low in treatment cost, small in occupied area, little in consumed water and the like, and has the universal application and is easy to popularize.

Description

technical field [0001] The invention relates to a treatment method for pollutants in the field of environmental protection, in particular to a treatment method for cyanide in cyanide tailings. Background technique [0002] Due to the use of cyanide gold extraction process in the production process of gold mines, a large amount of cyanide tailings will be produced, and this part of the cyanide tailings contains a large amount of highly toxic cyanide. Except for a small amount of cyanide tailings being utilized, a considerable amount of tailings can only be stockpiled, occupying a large amount of land resources. These cyanide tailings not only pollute surface water, groundwater and soil, but also many tailings ponds that store cyanide tailings have been used for an extended period of time or overloaded, which poses a great safety hazard to tailings stocks. Once the dam breaks and leaks, it will have serious consequences The surrounding environment has a great pollution impact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00
CPCB09B3/00B09B5/00B09B2101/02
Inventor 兰馨辉叶锦娟
Owner CHANGCHUN GOLD RES INST
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