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Dissociating, independent slurry mixing and bulk floatation process for fine grain middings

A mixed flotation and slurry mixing 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, avoiding energy consumption, and simple process flow

Active Publication Date: 2015-06-24
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

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  • Dissociating, independent slurry mixing and bulk floatation process for fine grain middings
  • Dissociating, independent slurry mixing and bulk floatation process for fine grain middings

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

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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 high-ash refractory coal slime separation process suitable for more medium coal contiguous bodies. Background technique [0002] With the continuous improvement of mechanized coal mining and the gradual decrease of coal resources, the quality of selected coal in our country has continued to deteriorate, and the content of high-ash refractory slime has gradually increased, which has brought great challenges to the efficient separation and clean utilization of coal resources. The main performance characteristics of high-ash refractory coal slime are high ash content, large medium coal content, and poor floatability. The outstanding problem faced during sorting is that the ash content of clean coal exceeds the standard, while the ash content of tailings is low. In general flotation process, it is difficult to achieve the desired effect for the high-ash refractory coal slim...

Claims

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Application Information

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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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