Integrated multi-stage dry permanent magnetic separator for classification and stepped sorting of coal

Abstract

Provided is an integrated multi-stage dry permanent magnetic separator for classification and stepped sorting of coal. A pre-selection and classification cuboid squirrel cage is used to carry out pre-selection and classification. The entire pre-selection and classification cuboid squirrel cage is arranged right above a magnetic system located below a large support. An integrated magnetic separatorfor classification and sorting is constructed. The magnetic system adopts a stepped multi-stage tilted magnetizing variable movable magnetic field open magnetic system structure, and is composed of multiple single-stage pentahedron magnetic poles. The magnetization direction of permanent magnets is inclined. The value of the acute angle of the triangle can be changed according to the physical property change. Non-magnetic materials can automatically fall off the inclined surface, and magnetic materials can be turned over to a certain extent. The right upper part of each stage of permanent magnet is connected with a corresponding granular material sieve plate of the cuboid squirrel cage structure through a grading area chute. A vertical motion cylinder is arranged right under each stage ofpermanent magnet. A tapered non-magnetic material collector is arranged at the right end of each stage of permanent magnet. A magnetic material collector is arranged on the right side of each stage of permanent magnet and above the corresponding non-magnetic material collector.

Description

technical field [0001] The patent of the present invention relates to a permanent magnet high gradient magnetic separator used to recover and purify heavy medium in the dense medium dry coal preparation process. This kind of magnetic separator is especially suitable for dry recovery and purification of heavy medium in coarse coal powder (product coal), and can also be used in metallurgy, non-metallic mineral purification and impurity removal and other fields. Background technique [0002] The resource endowment characteristics of rich coal, poor oil and little gas determine that my country's energy production and consumption will be dominated by coal for a long time, and the phenomenon of resource depletion caused by the large-scale mining of coal in the central and eastern regions has become increasingly prominent. At the same time, with the large-scale exploration and development of coal resources in the west, more than 2 / 3 of my country's coal reserves are located in the c...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of loss of magnetite powder caused by entrainment or mixing of part of magnetite powder in the fine-grained clean coal powder in the dry coal preparation system, and at the same time to improve the air-heavy medium dry coal preparation process system, to accelerate its application in the coal preparation industry, and to provide a coal classification and step separation integrated multi-stage dry permanent magnet magnetic separator

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