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A fine-grained medium coal dissociation-independent slurry adjustment-mixed flotation process

A slurry mixing and dissociation technology, which is applied in the direction of solid separation, wet separation, chemical instruments and methods, etc., can solve the problems of fine mud pollution, etc., and achieve the effects of low power consumption, high sorting efficiency and low investment

Active Publication Date: 2018-10-30
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0004] The present invention aims to provide a sorting process that can effectively realize the high-ash refractory coal slime with more medium-coal interlinked bodies, feed the coarse flotation coal tailings into the coarse-coal slime system for separation, and grind the medium-coal products ore dissociation; at the same time, the serious problem of fine mud pollution in the flotation after the conventional medium coal mill is solved through the strengthening of slurry adjustment, and it provides a kind of high separation efficiency with low cost, simple process, low investment, high separation efficiency and remarkable economic efficiency. Process method of gray refractory coal slime

Method used

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  • A fine-grained medium coal dissociation-independent slurry adjustment-mixed flotation process
  • A fine-grained medium coal dissociation-independent slurry adjustment-mixed flotation process
  • A fine-grained medium coal dissociation-independent slurry adjustment-mixed flotation process

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[0037] Example: such as figure 1As shown, the fine-grained medium coal dissociation-independent pulping-mixed flotation process of the present invention, according to the different requirements of the floating coal slime pulp and the medium coal dissociated pulp particle size to the slurry energy input, the floating coal slime is given to into the single-stage impeller slurry mixing tank, fully ensure the slurry mixing time (the slurry mixing time is not less than 4min) to ensure the full adsorption of the flotation collector on the surface of coal particles; the medium coal slurry is fed into the multi-stage forced stirring slurry mixing equipment, The equipment is equipped with three layers of stirring impellers and the stirring speed is high (the linear speed of the stirring impellers is not less than 6m / s), so that the dissociated fine particles and flotation collectors are fully dispersed in the slurry mixing equipment, and the collection of fine-grained coal slime is real...

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Abstract

The invention discloses a dissociating, independent slurry mixing and bulk floatation process for fine grain middings and belongs to the technical field of coal slime floatation. The process comprises the first step of slurry mixing operation, the second step of roughing, the third step of dehydration and fine floatation operation, the fourth step of separation and desliming operation, the fifth step of coarse slime separation operation, the sixth step of desliming operation and the seventh step of ore grinding operation. According to the independent slurry mixing bulk floatation process for dissociating the coal from the fine grains, the procedure is simple, investment is small, energy consumption is low, the operation cost is low, the separation efficiency is high, and economical benefits are remarkable.

Description

technical field [0001] The invention relates to the technical field of coal slime flotation, in particular to a sorting process suitable for high-ash and difficult-to-separate coal slime with many interlinked coal bodies. Background technique [0002] With the continuous improvement of mechanized coal mining and the gradual reduction of coal resources, the quality of selected coal in my country has continued to deteriorate, and the content of high-ash refractory coal slime has gradually increased, which has brought great challenges to the efficient separation and clean utilization of coal resources. The main characteristics of high-ash refractory coal slime are high ash content, high coal content, and poor buoyancy. The prominent problem in separation is that the ash content of clean coal exceeds the standard, while the tailing coal ash content is low. Generally, the flotation process is difficult to achieve the desired effect in the separation of high-ash, difficult-to-sepa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03B1/00B03B1/04
CPCB03B1/00B03B1/04B03B7/00
Inventor 桂夏辉曹亦俊张义王大鹏刘炯天夏灵勇佟顺增
Owner CHINA UNIV OF MINING & TECH
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