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Grading size mixing and bulk flotation separation process

A hybrid flotation and slurry mixing technology, applied in flotation, solid separation, wet separation, etc., can solve the problems of easy loss of coarse particles and pollution of fine mud, and achieve low operating costs, balanced recovery rate, and power consumption. small effect

Inactive Publication Date: 2015-07-01
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a simple coal slime separation process that can improve the effect of coarse and fine particle flotation, solve the problems of serious fine sludge pollution and easy loss of coarse particles in the tailing coal in the conventional flotation process, and provide a Low cost, simple process, low investment, high sorting efficiency, remarkable economic efficiency, easy-floating and difficult-to-separate coal slime process method

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[0028] Example: such as figure 1 As shown, the graded pulping-mixed flotation process of the present invention first pumps the flotation feed coal slime into the graded cyclone for classification according to a certain particle size (0.074mm or 0.125mm), and the obtained coarse Granular ore pulp and fine-grained ore pulp enter the pulping equipment for pre-pulling. According to the different requirements of coarse-grained pulp and fine-grained pulp on the pulping energy input, different mixing and pulping equipment are matched. Coarse pulp is fed into the single-stage impeller slurry mixing tank to fully ensure the slurry mixing time to ensure that the flotation collector is fully adsorbed on the particle surface; fine-grained pulp is fed into the multi-stage forced stirring slurry mixing equipment, which has three layers Stirring impeller and high stirring speed can fully disperse the fine-grained ore pulp and flotation collector in the slurry mixing equipment, and realize t...

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Abstract

The invention discloses a grading size mixing and bulk flotation separation process. The grading size mixing and bulk flotation separation process comprises the following steps that 1, flotation feeding coal slime is pumped to a grading cyclone to be graded according to a certain granularity (0.074mm or 0.125mm), and coarse pulp and fine pulp obtained after grading enter a size mixing device for size pre-mixing; 2, the coarse pulp enters a single-section impeller size mixing agitator, the size mixing time is no less than 4 min so as to ensure sufficient adsorption of flotation collectors on the surfaces of mine particles, the fine pulp enters a multi-section forced stirring size mixing device provided with three layers of stirring impellers and a high stirring rotation speed, and the linear velocity of the stirring impellers is no less than 6 m / s; 3, the coarse pulp and fine pulp after size pre-mixing are mixed through a pipeline and fed to a flotation column / machine, and flotation clean coal and flotation tailings are obtained after separation of the flotation column / machine. The grading size mixing and bulk flotation separation process is simple in technological process, low in investment, low in energy consumption, low in operation expense, high in separation efficiency and remarkable in economic benefit.

Description

technical field [0001] The invention relates to the technical field of peat separation, in particular to a graded slurry-mixed flotation separation process. Background technique [0002] Sorting and upgrading of refractory coal slime has always been a research hotspot of experts at home and abroad. Increasing the recovery rate of coarse particles and the selectivity of fine particles is the key to efficient separation of coal slime flotation. Generally speaking, coal slime separation is composed of two parts: slurry adjustment and flotation. After slurry adjustment, the incoming floating coal slurry enters the flotation machine (flotation column) to separate clean coal and tailing coal. At present, the outstanding problems faced by most coal preparation plants in the flotation process are: on the one hand, the consumption of reagents is large, and the ash content of clean coal is high. On the other hand, due to the low ash content of the tailing coal, a large number of low-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B1/00B03B1/04
CPCB03B7/00B03D1/00
Inventor 桂夏辉曹亦俊张义刘炯天李树磊夏灵勇佟顺增
Owner CHINA UNIV OF MINING & TECH
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