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Materials and methods for in-situ control of coal gangue pollution release

A technology for coal gangue and storage yard, which is applied in the field of industrial and mining solid waste pollution control, can solve the problems of destruction of surrounding ecosystems and certain limitations in the control effect, and achieves reduction of biological oxidation, no secondary pollution risk, and construction technology. simple effect

Active Publication Date: 2020-09-22
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the continuous input of oxygen in the air into the overlying water body, and as time goes by, the tailings under the water cover will be affected by its existing oxidation products (sulfate radicals, high-valent iron ions) and atmospheric reoxygenation. Catalytic oxidation occurs, resulting in certain limitations of water covering technology in terms of coal gangue oxidation acid production and pollutant control effect
Therefore, in the process of stacking a large amount of coal gangue, the coal gangue is easy to oxidize to produce acid, and dissolves a variety of characteristic pollutants to form strong acid and highly toxic sewage, causing damage to the surrounding ecosystem.

Method used

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  • Materials and methods for in-situ control of coal gangue pollution release
  • Materials and methods for in-situ control of coal gangue pollution release
  • Materials and methods for in-situ control of coal gangue pollution release

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1. Materials and methods for in-situ control of coal gangue pollution release, the control material is L-proline, and the mass ratio of the control material solution preparation is control material: water = 0.5%; the coal gangue is submerged and covered The mass ratio of treatment is coal gangue: control material solution = 1: 10.

[0038] The method for in-situ control of pollution release in coal gangue storage yard comprises the following steps:

[0039] a. Select low depressions, abandoned mine pits and other sites around the coal gangue storage yard as the coal gangue treatment and disposal site, and adopt environmental protection and anti-seepage treatment to make the site meet the anti-seepage requirements;

[0040] b. For the coal gangue treatment and disposal site that has undergone environmental protection and anti-seepage, mix L-proline into a solution of appropriate concentration or mix it with water to immerse and cover the gangue;

Embodiment 2

[0041] Example 2. Materials and methods for in-situ control of coal gangue pollution release, the control material is D-proline, the mass ratio of the control material solution preparation is control material: water = 3%; the coal gangue is submerged and covered The mass ratio of treatment is coal gangue: control material solution = 1: 2.

[0042] The method for in-situ control of pollution release in coal gangue storage yard comprises the following steps:

[0043] a. Select low depressions, abandoned mine pits and other sites around the coal gangue storage yard as the coal gangue treatment and disposal site, and adopt environmental protection and anti-seepage treatment to make the site meet the anti-seepage requirements;

[0044] b. For the coal gangue treatment and disposal site that has been treated for environmental protection and anti-seepage, D-proline is prepared into a solution with a suitable concentration or mixed with water to immerse and cover the gangue;

Embodiment 3

[0045] Example 3. A material and method for in-situ control of coal gangue pollution release, wherein the control material is DL-proline.

[0046] The method for in-situ control of pollution release in coal gangue storage yard comprises the following steps:

[0047] a. Select low depressions, abandoned mine pits and other sites around the coal gangue storage yard as the coal gangue treatment and disposal site, and adopt environmental protection and anti-seepage treatment to make the site meet the anti-seepage requirements;

[0048] b. For the coal gangue treatment and disposal site that has been treated for environmental protection and anti-seepage, the DL-proline is prepared into a solution of appropriate concentration or mixed with water to immerse and cover the gangue;

[0049] The mass ratio of the control material solution preparation is control material: water = 5%; the mass ratio of the coal gangue immersion covering treatment is coal gangue: control material solution ...

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Abstract

The invention discloses a material and method used for coal gangue storage yard pollution release in-situ control. The control material is proline. The method conducts immersion covering treatment on coal proline by adding the control material to achieve coal gangue storage yard pollution release in-situ control. By adoption of the material and the method, oxidation acid production in the stacking process of the coal proline can be effectively inhibited, and various pollutants are prevented from being dissolving out, so that the surrounding ecosystem is protected, and the material is low in price, simple in construction process, obvious in effect and high in operability.

Description

technical field [0001] The invention relates to a technology for controlling industrial and mining solid waste pollution, in particular to materials and methods for in-situ control of pollution release in coal gangue storage yards. Background technique [0002] Coal gangue is solid waste generated during coal mining and washing. At present, the accumulation volume in my country is nearly 5 billion tons. There are more than 1,600 large-scale coal gangue hills, occupying about 15,000 hm of land 2 , and it is increasing at a rate of 150 to 200 million tons per year. Since the comprehensive utilization of coal gangue resources in my country is less than 30%, a large amount of coal gangue is accumulated in the environment. Because coal gangue is often rich in sulfur, iron and associated manganese, copper, zinc, arsenic, chromium, cadmium, mercury and other elements, coal gangue will be oxidized to produce acid under the combined action of oxygen in the atmosphere and microorgani...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62D3/33
CPCA62D3/33A62D2101/47
Inventor 罗有发吴永贵付天岭王虎邢容容舒洁万祖容吴芷雪
Owner GUIZHOU UNIV
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