Dry method dense medium separation bed

Abstract

The invention provides a dry method dense medium separation bed. The dry method dense medium separation bed is dedicated to a dry method dense medium separator. Three flowing material flows (gas, a dense medium and coal) in the dry method dense medium separation bed are respectively intersected in a separation bed layer; the dense medium is in a fluidization separation chamber of the separation bed, compressed gas enters the fluidization separation chamber for fluidizing the dense medium after entering an air chamber for primary pressure equalization, and a fluidized bed suitable for separation is formed. The separation bed can satisfactorily solve the problems that the fluidized density is unstable and the air flow distribution is non-uniform in the fluidization process, the medium draining efficiency of an existing medium draining screen for a fine material is relatively low and the magnetic medium content of the fine material after medium draining is relatively high; the medium draining efficiency of the fine material can also be obviously improved.

Description

technical field [0001] The invention belongs to the field of dry mineral separation, in particular to a dry heavy medium separation bed, which is especially suitable for the separation of coal and other minerals with different densities, and belongs to solid separation equipment. Background technique [0002] At present, the dry dense medium separators used in industrial production at home and abroad are mainly wind jigs and wind shakers. Using air instead of water as the sorting medium has poor sorting effect, low production capacity, and requires strong wind, which has been gradually eliminated. [0003] Since the 1960s, scholars such as Douglas E in the United States and Beeckmans J M in Canada have successively carried out ordinary gas-solid fluidized bed dry separation research. The separation principle is to use fine particle materials (such as magnetite powder) as The weighted material forms a gas-solid two-phase fluidized bed with a certain density under the action ...

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Problems solved by technology

[0006] In order to solve the problems existing in the prior art, the present invention proposes a dry dense medium separation bed, which can not only solve the problems of unstable fluidized density and air flow in the fluidization process Uneven distribution, low efficiency of fine-grained material removal by the existing media removal screen, high content of magnetic medium in fine-grained materials after removal, etc., can also significantly improve the removal efficiency of fine-grained materials

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