Flotation process method of high-ash-content fine coal slime

A process method and technology for fine coal slime, applied in flotation, solid separation and other directions, can solve the problems of lack of good flotation process, difficult flotation, and reporting, and achieve scientific optimization of flotation process methods, scientific and environmental protection, The effect of improving the sorting index

Inactive Publication Date: 2013-04-17
唐山国华科技国际工程有限公司
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Problems solved by technology

[0005] 2. Extremely difficult flotation
[0014] According to the "Coal Floatability Evaluation Method", the combustible body recovery rate is less than or equal to 40% and is judged as extremely difficult to float. For the flotation of this difficult-to-float coal slime, there is no good flotation process report.

Method used

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  • Flotation process method of high-ash-content fine coal slime
  • Flotation process method of high-ash-content fine coal slime
  • Flotation process method of high-ash-content fine coal slime

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Embodiment Construction

[0047] The present invention will be further described below in conjunction with the accompanying drawings.

[0048] The key point of the present invention is to change the flotation process of the prior art. Before the coal slurry pretreatment, it first deslimes in advance, and adopts the process flow of the combination of pre-desliming and coal slime selection. The whole process is developed by Guohua Technology. The equipment is operated, and the qualified high-quality coking clean coal is separated from the high-ash low-quality coal.

[0049] See the specific process steps figure 1

[0050] The process method of the present invention selects the flotation feed desliming tank (patent application number: 201210099180.4) invented by Tangshan Guohua Technology Co., Ltd. No.: ZL201010033384.9) for pretreatment, and then use a jet flotation machine (patent No.: ZL200810054981.2) for roughing and refining. The operation steps of this method are shown in figure 1 : It consist...

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Abstract

The invention relates to a flotation process method of high-ash-content fine coal slime. According to the method, pre-desliming is carried out by using a flotation coal slime flotation feeding desliming pond invented by Tangshan Guohua Technology International Engineering Co., Ltd., preprocessing is carried out by using a pulverization drop-type coal slurry preprocessor, and rough flotation and fine flotation are carried out by using an air jet flotation machine. The method comprises the following steps of: pre-desliming; preprocessing of the coal slurry; controlling of the feeding concentration of the flotation machine; and dehydration and recycling. According to the flotation process method of the high-ash-content fine coal slime, coking clean coal is sorted from inferior coal slime, the flotation process method is scientific and optimized, perfect indexes of sorting are substantially improved, the outward discharging of slime water is thoroughly avoided, the closed cycle of washing water of a coal cleaning plant is realized, and the method is scientific and environment-friendly.

Description

technical field [0001] The invention relates to a coal slime flotation method, in particular to a high ash fine coal slime flotation process. [0002] Background technique [0003] The mixed argillaceous shale in the raw coal of the coal preparation plant is soaked in water during the wet coal preparation process, and is broken and dispersed in the flotation slime, and accumulates in the fine slime <0.03mm (500 mesh) . This slime has two characteristics: [0004] 1. High ash content and fine particle size, the ash content of flotation slime is as high as 42%, while the flotation tailings of some coal preparation plants in my country are only more than 40%. The fine mud <0.03mm accounts for almost 2 / 3, and the ash content is as high as 58.65%. [0005] 2. Extremely difficult flotation [0006] Fine mud is harmful to flotation mainly as follows: [0007] a. High-ash fine mud seriously pollutes flotation clean coal, making it difficult to guarantee its quality. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/00B03D1/14
Inventor 吴大为张晓洲张贤贤许建军马瑞平李云红武丽丽郭雅利王亚李丽芳
Owner 唐山国华科技国际工程有限公司
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