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Source pollution control method for acidic coal gangue storage yard

A technology for pollution control and coal gangue, applied in the direction of solid waste removal, etc., can solve the problems of high cost of soil cover, high processing cost, ecological hazards, etc., achieve small biological hazards and environmental impact, good environmental benefits, and low cost. Effect

Inactive Publication Date: 2013-10-23
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the high cost of foreign soil covering that is common in coal gangue yards, the common alkali neutralization method and fertilization treatment are prone to failure, the end treatment is protracted and high processing costs, and the serious environmental impact and serious environmental impact caused by continuous stacking of large quantities of coal gangue. The problem of ecological hazards

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Simulated leaching test: collect newly produced sulfur-containing coal gangue samples (sulfur content is 7.54%) in coal mining areas, air-dry them indoors, and crush them through a 2mm nylon sieve for later use.

[0020] The leaching device adopts a 200mL plastic cup made of PP material, with a diameter of 1mm at the bottom of the cup and a percolation hole with a density of 5mm*5mm / hole. The bottom of the plastic cup is covered with two layers of non-woven fabric as a filter layer; air-dried samples with different treatments Put it into the leaching device, and use a 1.5L PP plastic bottle as the coal gangue leachate collection bottle.

[0021] Set sodium dodecyl sulfate (SDS) antibacterial treatment (soak the gangue sample in 10% sodium dodecyl sulfate aqueous solution for 24h), set a blank control group (coal gangue sample without antibacterial treatment) at the same time, each Treat two parallels. Spray 50ml of aerated tap water for leaching every day, sample once a...

Embodiment 2

[0023] Simulated leaching test: set sodium benzoate (SBZ) antibacterial treatment (soak the gangue sample in 10% sodium benzoate aqueous solution for 24h) and a blank control group (coal gangue sample without antibacterial treatment).

[0024] Others are the same as embodiment 1.

[0025] After the index measurement in the first 6 weeks and the observation results in the past three months, it shows that sodium dodecyl sulfate (SDS) antibacterial treatment and sodium benzoate (SBZ) antibacterial treatment can significantly increase the pH of the leaching solution, and significantly reduce the coal Acidity, EC, Eh, Fe, Fe in gangue leaching solution 2+ , Mn, Cu, Zn, and anion SO 4 2- and F - Concentration, while antibacterial treatment can significantly reduce Fe in the drench solution 2+ Conversion ratio to ferric iron. At the same time, in terms of pollution control effect, sodium benzoate (SBZ) antibacterial treatment is also significantly better than sodium dodecyl sulf...

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Abstract

The invention discloses a source pollution control method for an acidic coal gangue storage yard. The source pollution method for the acidic coal gangue storage yard comprises the following steps of: a, preparing acidic coal gangue storage yard antibacterial agent; b, spraying on the surface of the coal gangue storage yard; and c, carrying out daily maintenance or subsequent depth treatment. The source pollution control method for the acidic coal gangue storage yard disclosed by the invention can be used for effectively inhibiting acid production by acidic coal gangue oxidization and digestion of a plurality of polluted substances from the source, so that the problems that the existing coal gangue storage yard commonly has high soil replacement covering cost, the common alkali neutralization method and the fertilizer application treatment are easy to lose effect, the end treatment is lasting and higher in treatment cost, and severe environment interference and ecological hazards are continuously generated by stacking much coal gangue are solved. Moreover, the antibacterial material resource is wide, the cost is low, the construction process is simple, the operability is strong, the efficiency is high, the secondary environment pollution risk is small, and the environment benefits, the economic benefits and the social benefits are better, so that the source pollution control method is suitable for large-area application and implementation.

Description

technical field [0001] The invention belongs to the technical field of industrial and mining solid waste pollution control, and specifically relates to a source pollution control method for treating acidic coal gangue storage yards by using an antibacterial agent. Background technique [0002] Coal accounts for more than 2 / 3 of my country's energy structure, and a large amount of associated FeS is produced in the process of coal mining. 2 , FeAsS, CuFeS 2 , ZnS and other reducing sulfide minerals. Generally, every 1 ton of coal mined is associated with about 10%-30% of coal gangue, which is limited to the current technical and economic level in my country. The use of coal gangue is mainly for backfilling, brick making, roadbed, etc. way, the comprehensive utilization is less than 30%, and coal gangue has become one of the largest industrial wastes in my country. Coal gangue is piled up under natural environmental conditions, and under the combined effects of air oxidation, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B1/00
Inventor 付天岭吴永贵洪冉吴宇
Owner GUIZHOU UNIV
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