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A flotation process for treating coal slime with saline wastewater

一种含盐废水、浮选的技术，应用在浮选、固体分离等方向，能够解决煤泥浮选药量大、成本高等问题，达到变废为宝环保要求、缓减生产压力、解决生产和运输成本高的效果

Active Publication Date: 2020-01-17
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A flotation process for treating coal slime with saline wastewater
  • A flotation process for treating coal slime with saline 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 and 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. The composition of the salt is NaCl, NaCl 2 SO 4 , CaCl 2 and CaSO 4 , through the circulation 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 cont...

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Abstract

The invention discloses a flotation process for treating coal slime by using saline wastewater, which is suitable for use in the technical fields of saline wastewater treatment and coal flotation deashing. Feed the floating coal slime, collector and foaming agent into the pulp preprocessor, and feed the coal chemical salty wastewater discharged from the coal chemical industry as dilution water into the pulp preprocessor to mix together to complete mineralization; the mineralized The pulp is subjected to roughing operation, and the product after the roughing operation is selected. The ash tester is used to conduct ash test on the selected tailings. If the ash content of the selected tailings is >20%, it will be re-classified into the pulp preprocessor. If the ash content of the selected tailings is less than 20%, it will be discharged as a selected tailings product; the selected tailings product will be discharged from the pipeline k and then enter the filter press for dehydration, and the dewatered filter press will discharge the filter cake m as the final product Qualified concentrate products. The method has simple steps and good application effect, which not only improves the efficiency of flotation, but also solves the problem of environmental protection treatment of saline waste water.

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 Patents(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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