Separating device and separating method for self streaming gas-solid magnetic field fluidized bed

Abstract

The invention discloses a separating device and a separating method for a self streaming gas-solid magnetic field fluidized bed, and are suitable for dry separation of fine pea coal. The device consists of a fluidized bed body, an air chamber and a plurality of helmholtz coils, wherein the fluidized bed body is obliquely arranged; the air chamber is arranged on the lower part of the fluidized bed body; the whole fluidized bed is positioned in the plurality of the helmholtz coils; and the helmholtz coils are arranged at equal intervals. The method comprises that: a magnetically stabilized fluidized bed is formed by using a magnetic field generated by the helmholtz coils; separating media and the fine pea coal are fed from one end of the fluidized bed body; and the air enters from a bottom air distributor; the fine pea coal is divided into floating objects and sinking objects according to the density; and the floating objects and the sinking objects are discharged along the flowing of the media through a discharge port. The self streaming gas-solid magnetic field fluidized bed improves the fluidized characteristics of the fluidized bed, reduces the lower limit of the separation of the air-gas fluidized bed, improves the sharpness of separation, has compact structure, long service life and less investment, can separate coal of -6 mm with Ep value up to 0.07 g / cm , has excellent separation effect, and is particularly suitable for separation of coal in chilliness and arid regions and the coal easily argillaceous when encountering water.

Description

technical field [0001] The invention relates to a self-flowing gas-solid magnetic field fluidized bed sorting device and method, in particular to a dry sorting method suitable for fine-grained coal in severe cold, arid and water-deficient areas and easily muddy when exposed to water. Background technique [0002] Dry separation of fine-grained coal is a worldwide problem, especially fine-grained coal less than 6mm. The patent number is: 01237426.1 discloses a sorting device for a magnetically stable fluidized bed. The main structural feature of the sorting device is that the discharge channels for light and heavy products are equipped with electromagnetic coils to control the discharge speed, and the outer walls of the medium feed channels are set at intervals. There is a medium conveying coil, and the outer ring tank of the fluidized bed is provided with an electromagnetic coil for stabilization and an electromagnetic coil for conveying the medium and the selected material ...

AI Technical Summary

Problems solved by technology

This kind of sorting device is difficult to control the operating parameters and technical indicators during material sorting, and because multiple magnetic conveying devices need to assist the flow of materials through alternate power failures, its structure is complicated

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