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Method for removing cyanide from cyanided tailing slurry

A technology of cyanide tailings and treatment method, applied in mining wastewater treatment, chemical instruments and methods, filtration treatment, etc., can solve the problems of low treatment efficiency, unsteady reach, high treatment cost, and achieve high treatment efficiency and good effect. , good processing effect

Inactive Publication Date: 2019-07-05
CHANGCHUN GOLD RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a method for decyanation treatment of cyanided tailings pulp to solve the problems of low processing efficiency, high processing cost, and inability to stably meet the technical requirements of the "Technical Specifications for Cyanide Slag Pollution Control in the Gold Industry" (HJ 943-2018). Provide a cyanidation tailings slurry decyanation treatment process with good treatment effect, high treatment efficiency and stable operation

Method used

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  • Method for removing cyanide from cyanided tailing slurry
  • Method for removing cyanide from cyanided tailing slurry
  • Method for removing cyanide from cyanided tailing slurry

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Embodiment 1

[0013] Include the following steps:

[0014] (1) Solid-liquid separation and washing treatment of cyanide tailings slurry: pump the cyanide tailings slurry into a filter press with washing and blow-off functions for pressure filtration, blow-off and high-pressure washing, and the resulting press liquid and blow-off The liquid is returned to the cyanide beneficiation production process to ensure production water and recover valuable metal elements. The resulting high-pressure washing liquid enters the next step of the process for decyanation treatment. "(HJ 943-2018) Tailings pond disposal or utilization pollution control technical requirements;

[0015] The process sequence of pressure filtration, air stripping and high-pressure washing can be set repeatedly according to the cyanide content in the cyanide tailings slurry and the difficulty of separation and washing decyanation. For example, if the cyanide content is low or the separation and washing decyanation is easier Sing...

Embodiment 2

[0020] Include the following steps:

[0021] (1) Solid-liquid separation and washing treatment of cyanide tailings slurry: pump the cyanide tailings slurry into a filter press with washing and blow-off functions for pressure filtration, blow-off and high-pressure washing, and the resulting press liquid and blow-off The liquid is returned to the cyanide beneficiation production process to ensure production water and recover valuable metal elements. The resulting high-pressure washing liquid enters the next step of the process for decyanation treatment. "(HJ 943-2018) Tailings pond disposal or utilization pollution control technical requirements;

[0022] The process sequence of pressure filtration, air stripping and high-pressure washing can be set repeatedly according to the cyanide content in the cyanide tailings slurry and the difficulty of separation and washing decyanation. For example, if the cyanide content is low or the separation and washing decyanation is easier Sing...

Embodiment 3

[0027] Include the following steps:

[0028] (1) Solid-liquid separation and washing treatment of cyanide tailings slurry: pump the cyanide tailings slurry into a filter press with washing and blow-off functions for pressure filtration, blow-off and high-pressure washing, and the resulting press liquid and blow-off The liquid is returned to the cyanide beneficiation production process to ensure production water and recover valuable metal elements. The resulting high-pressure washing liquid enters the next step of the process for decyanation treatment. "(HJ 943-2018) Tailings pond disposal or utilization pollution control technical requirements;

[0029] The process sequence of pressure filtration, air stripping and high-pressure washing can be set repeatedly according to the cyanide content in the cyanide tailings slurry and the difficulty of separation and washing decyanation. For example, if the cyanide content is low or the separation and washing decyanation is easier Sing...

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Abstract

The invention relates to a method for removing cyanide from cyanided tailing slurry, and belongs to the field of pollutant processing in environment protection. A cyanided tailing slurry solid-liquidseparating-washing unit and a high pressure washing liquor cyanide removing unit are adopted; cyanided tailing slurry is processed by the solid-liquid separating-washing unit, generated filtrate and air stripping liquid are returned to the cyaniding and ore-dressing step so as to realize water balance in the cyaniding and ore-dressing step; precious metals such as silver, gold, and the like, in the tailing slurry are recovered; the consumption of sodium cyanide and calcium oxide in the cyaniding process is reduced; the produced press-filtration residues meet the disposal requirements of a tailing warehouse or discharge requirements, the cyanided tailings can be legally processed or utilized; after the washing liquid is efficiently processed by a cyanide removing agent, the washing liquid is added into the cyanided tailing slurry solid-liquid separating-washing unit and has a positively promoting effect; and the method has the advantages of high processing efficiency, good processing effect, low processing cost, and small occupied area, and has a wide application prospect in the field of cyanided tailing slurry treatment.

Description

technical field [0001] The invention relates to a method for treating pollutants in the field of environmental protection, in particular to a method for treating gold mine cyanide tailings slurry. Background technique [0002] At present, the vast majority of gold production enterprises in my country are still using the cyanide gold extraction process, and a large amount of cyanide-containing tailings are accumulated during gold production. With the development of cyanide gold extraction process technology, the accompanying solid waste problem is also It has become increasingly apparent, especially when the "National Hazardous Waste List" (2016 edition) was released in June 2016, which defined "cyanide tailings produced during the process of using cyanide for gold beneficiation" as hazardous waste. In March 2018, the Ministry of Environmental Protection issued and implemented the "Technical Specifications for the Control of Cyanide Slag Pollution in the Gold Industry" (HJ 943...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/18C02F103/10
CPCC02F1/001C02F1/58C02F2101/18C02F2103/10
Inventor 刘强李哲浩张宇迟崇哲
Owner CHANGCHUN GOLD RES INST