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Treatment method of slime water

A treatment method, coal slime water technology, applied in water/sludge/sewage treatment, multi-stage water treatment, mining wastewater treatment, etc., can solve the problems of polymer flocculant not easy to degrade, large amount of flocculant, secondary pollution, etc. , to achieve good treatment effect, no secondary pollution, and environment-friendly effect

Inactive Publication Date: 2015-02-04
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a treatment method for coal slime water, aiming to solve the problems of large amount of flocculant, secondary pollution, difficult degradation and toxicity of polymer flocculant in the existing coal slime water treatment technology

Method used

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  • Treatment method of slime water

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Effect test

Embodiment 1

[0025] The concentration of coal slime particles in a certain coal slime water is 32g / L, the pH value of coal slime water is 8.5, the particle size and ash content of coal slime solid particles are as follows: the content and ash content below 0.074mm are 56.58% and 70.19%, respectively, and the content and ash content below 0.045mm They are 49.69% and 75.48% respectively.

[0026] Adopt the inventive method to process above-mentioned coal slime water, concrete steps are as follows:

[0027] (1) Inoculate the strains of Azotobacter rotundum into the liquid medium, the proportion of the medium is 5.0 g / L of sucrose, Na 2 HPO 4 2.0 g / L, MgSO 4 ·7H 2 O 0.5 g / L, FeCl 3 0.005 g / L, CaCl 2 0.1 g / L, AlCl 3 0.5 g / L, pH value 7.0; cultured in a water bath at 30°C for 72 hours with shaking, and the culture solution of Azotobacter rotundum obtained was centrifuged at 3000 r / min, and the centrifuged supernatant was flocculant for Azotobacter rotundum.

[0028](2) Take 200mL of we...

Embodiment 2

[0033] The concentration of coal slime particles in a certain coal slime water is 94g / L, the pH value of coal slime water is 8.3, the particle size and ash content of coal slime solid particles are as follows: the content and ash content below 0.074mm are 78.08% and 49.80%, respectively, and the content and ash content below 0.045mm They are 65.69% and 46.48% respectively. This coal slime water has a high concentration of suspended solids, a relatively high content of fine particles, and low ash content, making it difficult to settle naturally.

[0034] Adopt the inventive method to process above-mentioned coal slime water, concrete steps are as follows:

[0035] (1) Inoculate the strains of Azotobacter rotundum into the liquid medium, the proportion of the medium is 5.0 g / L of sucrose, Na 2 HPO 4 2.0 g / L, MgSO 4 ·7H 2 O 0.5 g / L, FeCl 3 0.005 g / L, CaCl 2 0.3 g / L, AlCl 3 1.0 g / L, pH value 7.3; cultured in a water bath at 30°C for 96 hours with shaking, and the culture...

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Abstract

The invention belongs to the technical field of microbial application and relates to a method of floating and separating clay minerals and micro-fine pea coal in slime water which is flocculated by using a microbial flocculant. The main process of the method comprises preparation of the microbial flocculant, flocfloatation by microorganisms and flocculating settling by microorganisms. The method is characterized by specifically comprises the following steps: adding the microbial flocculant into 20-400g / L slime water; adjusting the pH of ore pulp and adding a flotation separation agent for floatation separation in a floatation separation column; further adding micro-fine pea coal microbial flocculant into the ore pulp subjected to flotation seperation to realize flocculating settling; and finally, respectively recovering a flotation froth product and combustible micro-fine pea coal, wherein the ash content of the forth product is over 80%, the flocculation rate of the combustible micro-fine pea coal is over 80% and the ash content is less than 10%. According to the method provided by the invention, combustibles in the slime water can be recycled with a good microbial flocculation effect. Moreover, the microbial flocculant is extensive in culture condition, strong in degradability, environment-friendly and free of secondary pollution.

Description

technical field [0001] The invention relates to a treatment method of coal slime water, in particular to a method for flotation and separation of clay minerals and fine-grained coal after the coal slime water is flocculated by a microbial flocculant, and belongs to the field of microbial application technology and mineral processing technology. Background technique [0002] Coal slime water is a mixture of water produced in the coal preparation process and various minerals, fine-grained coal, and clay, and has the properties of suspension and colloidal solution. With the improvement of the mechanization level of coal mining, the amount of gangue in raw coal has been increasing, resulting in a large amount of highly muddy coal slime water that is difficult to settle in the process of coal washing. Coal slime water must be processed through a certain process before it can be recycled in coal preparation plants or meet the discharge requirements of national environmental protec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/10
CPCC02F1/24C02F3/34C02F9/00C02F2103/10C02F2301/08
Inventor 杨志超董宪姝刘生玉郭建英张素红
Owner TAIYUAN UNIV OF TECH
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