Settling method of solid substances in carboniferous system coal slurry water

A technology of solid matter and slime water, applied in separation methods, chemical instruments and methods, precipitation separation, etc., can solve problems such as poor treatment effect, impact on coal preparation plant production, and treatment effect Coal preparation plant production impact, etc., to achieve processing capacity The effect of increasing and saving the cost of chemicals and reducing the water content of the filter cake

Inactive Publication Date: 2012-10-31
DATONG COAL MINE GRP
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Problems solved by technology

[0007] In order to solve the problem that the poor treatment effect of existing Carboniferous coal slime water has a great impact on the production of coal preparation plants, the present invention provides a method for settling solid matter in Carboniferous coal slime water
[0009] The types and parameters of the flocculant and coagulant added to the sedimentation method ...

Method used

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Embodiment Construction

[0012] Settling method of solid matter in Carboniferous coal slime water, adding flocculant and coagulant to Carboniferous coal slime water, the flocculant uses polypropylene with a molecular weight greater than 23 million and a degree of hydrolysis of 20%, (21%, 23% or 27%) Amide, polyaluminum chloride is used as the coagulant, the amount of polyacrylamide is 3, (3.2, 3.8 or 4.4g / m3), the amount of polyaluminum chloride is 40g / m3, the concentration of polyacrylamide is 100ppm, and the concentration of polyacrylamide is 100ppm. Aluminum chloride preparation concentration is 1000ppm.

[0013] The flocculant is HJ62526 polyacrylamide.

[0014] In the specific implementation process, the flocculant is an ultra-high molecular weight polyacrylamide, and its production raw material is acrylonitrile, which is produced from acrylonitrile by biocatalysis, and then polymerized into polyacrylamide from acrylamide. Cultivate the strains and then ferment to make the strains proliferate in...

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Abstract

The invention provides a settling method of solid substances in carboniferous system coal slurry water, and solves the problems that great influence is caused to production of a coal preparation plant due to poor carboniferous system coal slurry water treatment effect. The settling method is characterized in that flocculant and polycoagulant are added in the carboniferous system coal slurry water, the flocculant adopts polyacrylamide with the molecular weight of more than 23 million and the degree of hydrolysis of 20% to 27%, the polycoagulant adopts polyaluminum cloride, the use level of the polyacrylamide is 3 to 4.4g/m<3>, the use level of the aluminium polychlorid is 40g/m<3>, the configuration concentration of the polyacrylamide is 100 ppm, and the configuration concentration of the polyaluminum cloride is 1,000 ppm. According to the settling method, the use level of the flocculant is greatly reduced, so that the thickness of the clear water layer in a thickener is larger than 1.5 m, the processing capacity of a pressurizing filter is increased by about 33%, the cost of the flocculant can be saved by 912,200 yuan every year, not only is the drug cost saved, but also the processing capacity of the pressurizing filter is increased, and the moisture of a filter cake is reduced.

Description

technical field [0001] The invention relates to a method for treating Carboniferous coal slime water, in particular to a method for settling solid matter in Carboniferous coal slime water. Background technique [0002] For a long time, coal mines have mainly mined Jurassic coal. As the reserves of Jurassic coal have decreased and the mining depth has increased, the amount of Carboniferous coal mining has increased year by year. The coal slime in Carboniferous coal contains a large amount of clay minerals. Severe mudification has brought great difficulties to the production of the coal preparation plant: [0003] 1. The overflow water of the concentrator has high turbidity, is milky white, and contains a large amount of high ash and fine particles. This part of the material enters the coal washing system with the circulating water. The impact of settlement will cause the concentration of overflow water to increase until it turns black for a long time, which will have a great...

Claims

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Application Information

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IPC IPC(8): B01D21/01C02F1/56
Inventor 仝效任书堂贾怀军张宏明陶逊陈文武常晓华
Owner DATONG COAL MINE GRP
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