Flotation feed desliming pool

Abstract

A flotation feed desliming pool comprises a feeding pipe, a flotation feeding pump, a feeding distribution tank, an overflow tank and a flow distribution area, wherein the feeding distribution tank, the overflow tank and the flow distribution area are disposed above the desliming pool. The feeding distribution tank is arranged above the desliming pool and connected with the feeding pipe, and a plurality of through holes are uniformly distributed on a transverse partition which is arranged in the middle of the feeding distribution tank. The flow distribution area comprises a vertical pipe combination unit arranged above the middle of the desliming pool, the vertical pipe combination unit consists of a plurality of vertically arranged pipelines which are formed by mutually stacking a plurality of glass epoxies bent by compression, and the cross section of each pipeline is regular hexagonal. A gap of coal dressing equipment is filled by the flotation feed desliming pool by means of innovative measures, desliming process of flotation feed is realized by the aid of the hydraulic classification principle, and the flotation feed desliming pool is simple in structure, convenient in operation, effective in desliming and high in operating efficiency. Further, underflow of the desliming pool is conveyed by the feeding pump to floatation operation, the flotation feed desliming pool integrates functions of desliming and feed buffering and is low in investment and quick in effectiveness.

Description

technical field [0001] The invention relates to a coal slime water treatment equipment in a coal preparation plant, in particular to a flotation feed desliming tank. Background technique [0002] The principle process of desliming flotation coal slime water is to remove the fine sludge that will deteriorate the flotation effect before the flotation feed is carried out by means of hydraulic classification. The detached fine mud is concentrated and recovered by the second-stage thickener. This slime water principle process is suitable for coal preparation plants with large amount of fine slime and high ash content in the flotation feed. The coal slime in the coal preparation plant of Mine A is a typical case (see Table 1), in which the ash content of <0.030mm particle size is as high as 57.45%, and the yield rate is 45.01%. The reason is that the clay minerals in the coal seam are mixed during the mining process In the raw coal, in the process of wet coal preparation,...

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Problems solved by technology

[0006] 1. The fine mud flotation speed is fast, which seriously pollutes the clean coal, which not only increases the ash content, but also makes the foam "sticky", which makes it difficult for the subsequent flotation clean coal dehydration operation;

[0007] 2. The specific surface area of ​​fine mud is large, and the flotation agent is "preemptively" adsorbed, so that ordinary coal particles cannot obtain the flotation agent they should;

[0008] 3. Non-selective occupation of the air bubble surface makes it more difficult for general coal particles to adhere to air bubbles

[0022] 4. From the requirements of the coal preparation process, the feeding amount of the hydrocyclone is not adjustable for the cyclone itself, and the area of ​​the feeding port of the hydrocyclone is fixed, so its working pressure is also constant. , so the classification particle size of the hydrocyclone cannot be adjusted with the change of coal quality

[0023] Although my country's coal preparation plants have been exploring the principle of desliming flotation coal slime water process for many years, its research and application are not deep enough, especially there is no finalized special desliming equipment, some coal preparation plants implement desliming flotation In the principle process of coal slurry preparation, a rake thickener is used. The rake thickener feeds the material in the upper center, and then in the horizontal flow layer that moves radially to the circular periphery, the particles are classified according to their disturbing settling speed. Its desliming effect is not ideal

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