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Flotation technology for treating coal slime by utilizing salt-containing wastewater

A saline wastewater and flotation technology, which is applied in flotation, solid separation, etc., can solve the problems of high cost and large amount of coal slime flotation, achieve the requirements of reducing production pressure, turning waste into treasure, and improving environmental protection. The effect of action efficiency

Active Publication Date: 2019-05-17
CHINA UNIV OF MINING & TECH
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Problems solved by technology

However, these methods have not solved the problem of large amount of chemicals in coal slime flotation and high cost, and there are still bottleneck technical barriers in coal slime flotation

Method used

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  • Flotation technology for treating coal slime by utilizing salt-containing wastewater
  • Flotation technology for treating coal slime by utilizing salt-containing wastewater

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Embodiment Construction

[0028] Attached below figure 2 The implementation of the present invention is further described:

[0029] Such as figure 1 with figure 2 Shown, the present invention utilizes the flotation process of saline waste water treatment coal slime, it is characterized in that comprising steps as follows:

[0030] The floating coal slime enters the slurry preprocessor 3 from the bottom through the pipeline b, and the collector and foaming agent are fed into the slurry preprocessor 3 through the pipeline c to form a mixed slurry;

[0031] Put the coal chemical industry salty wastewater discharged from the coal chemical industry into the mixing tank 1 and stir evenly. The concentration of the brine after stirring is 30000mg / L, and the composition of the salt is NaCl, NaCl 2 SO 4 , CaCl 2 and CaSO 4 , through the circulating pump 2, the brine is used as dilution water to enter the pulp preprocessor 3 along the pipeline a, and the salty wastewater from the coal chemical industry is...

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Abstract

The invention relates to a flotation technology for treating coal slime by utilizing salt-containing wastewater. The flotation technology is suitable for application in the technical fields of salt-containing wastewater treatment and coal flotation dedusting. The flotation technology comprises the following steps: feeding floating coal slime, collecting agent and foaming agent into an ore pulp preprocessor; feeding coal chemical industrial salt-containing wastewater discharged by coal chemical industry enterprises as dilution water into the ore pulp preprocessor for mixing and mineralizing; performing rough concentration on the mineralized ore pulp; finely selecting the product after rough concentration; using an ash test instrument for testing ash content of the cleaner tailings; feedinginto the ore pulp preprocessor for re-sorting if the ash content of the cleaner tailings is more than 20%; discharging the cleaner tailings as cleaner tailing products if the ash content of the cleaner tailings is less than 20%; discharging the cleaner tailing products from a pipeline k, and then entering into a filter press for dehydrating; discharging filter cake m as the final qualified concentrate product after dehydrating by the filter press. The flotation technology has the advantages of simple steps, excellent use effect and capability of promoting floatation efficiency and solving theproblem of environment-friendly treatment of salt-containing wastewater.

Description

technical field [0001] The invention relates to a coal slime flotation process, in particular to a flotation process for treating coal slime with saline waste water and used in the technical fields of saline waste water treatment and coal flotation deashing. Background technique [0002] my country is a large coal-producing and coal-consuming country. With the increase in the proportion of mechanized coal mining and the rapid development of dense-medium coal preparation, my country's coal slime presents the characteristics of micronization, high ash content, and large content of associated organisms. Coal slime is difficult to separate. The sense of urgency is further highlighted. Coal slime separation mainly has the problems of weak recovery ability and poor sorting adaptability. Most coal preparation plants can only guarantee the yield of coal slime by sacrificing product quality. In recent years, with the severe changes in the form of coal, the requirements for large-scal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/001B03D103/08
CPCB03D1/02B03D2203/08B03D1/085B03D2201/04B03D1/002B03D2203/008B03D2201/02B03D1/004B03D2201/007
Inventor 蒋立翔桂夏辉武建军邢耀文张锐夏阳超丁世豪郭芳余
Owner CHINA UNIV OF MINING & TECH
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