A multi-stage dry-process permanent magnet magnetic separator integrating coal classification and step separation

Abstract

A multi-stage dry permanent magnet magnetic separator integrating coal classification and ladder separation, which uses a squirrel cage with a pre-selection and classification rectangular parallelepiped structure for pre-selection and classification. The entire pre-selection and classification cuboid structure of the squirrel cage is set in the magnetic system located under the large bracket. Directly above, build a magnetic separator integrated with grading and sorting; the magnetic system adopts a stepped multi-stage tilt magnetization variable movable magnetic field open magnetic system structure, which is composed of multiple single-stage pentahedral magnetic poles. The magnetization direction of the permanent magnet It is in an inclined direction, and the angle of the acute angle of the triangle can be changed according to changes in physical properties. Non-magnetic materials can automatically fall off on the inclined surface, and magnetic objects can achieve a certain flipping; the upper part of each level of permanent magnet passes through the classification area chute and the cuboid squirrel cage structure. The screening sieve plates for materials of corresponding granularity are connected correspondingly. A vertical motion cylinder is provided just below the permanent magnet of each stage; a conical non-magnetic collector is provided at the right end of the permanent magnet of each stage; the right side of the permanent magnet of each stage is located on the non-magnetic material collector. The upper part of the magnetic object collector is provided with a magnetic object 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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