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Dry method heavy medium separator adopting dry method heavy medium separation bed and separation device

  • US 10,265,702 B2
  • Filed: 12/22/2016
  • Issued: 04/23/2019
  • Est. Priority Date: 12/30/2014
  • Status: Active Grant
First Claim
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1. A separation method comprising the following steps:

  • feeding 6-100 mm-grade coal into a dry method heavy medium separator and adding dense media into the dry method heavy medium separator, wherein the 6-100 mm-grade coal is uniformly fed into the dry method heavy medium separator along the width of the dry method heavy medium separator, and wherein the amount of dense media added to the dry method heavy separator is continuously adjustable, wherein the dry method heavy medium separator comprises;

    a compressed air receiver,a floating material end medium drum screen,a dust collector pipeline,a material inlet,a main heavy medium separation machine,a magnetic separator,a bag-type dust collector,a medium bucket elevator,a Roots blower,a bag-type dust collector induced draft fan,a sediment discharge end medium drum screen, andhigh-pressure air pipes,wherein the floating material end medium drum screen and the sediment discharge end medium drum screen are arranged below a floating material discharge end and a sediment discharge end of the dry method heavy medium separator,wherein the floating material end medium drum screen and the sediment discharge end medium drum screen are used for separating separation products from media,wherein the bag-type dust collector is used for collecting dust,wherein the dust collector pipeline is arranged at a top of the dry method heavy medium separator,wherein an air draft volume is larger than an air supply volume during working of the dry method heavy medium separator so that the inside of the dry method heavy medium separator is in a negative pressure state such that dust in the dry method heavy medium separator cannot escape,wherein suction pipes are arranged at the floating material end medium drum screen, the sediment discharge end medium drum screen, and the magnetic separator, andwherein the dry method heavy medium separator is in a fully closed working state;

    providing compressed air to the inside of the dry method heavy medium separator with an air supply system, and forming a gas-solid two-phase fluidized bed with the dense media so as to realize layering separation based on different densities, wherein the air supply system comprises the Roots blower, the compressed air receiver, and the high-pressure air pipes, wherein an upper part of the dry method heavy medium separator is connected to an air draft dust collection system;

    arranging, because products discharged by the dry method heavy medium separator carry a certain amount of media, the floating material end medium drum screen and the sediment discharge end medium drum screen below a floating material discharge end and a sediment discharge end of the dry method heavy medium separator, using the floating material end medium drum screen and the sediment discharge end medium drum screen to separate the separation products from media, elevating the separated media into the magnetic separator at the upper part of the dry method heavy medium separator with the medium bucket elevator, removing pulverized coal in the media with the magnetic separator, and unloading pure media inside the dry method heavy medium separator so that the media can be recycled so as to reduce medium consumption; and

    arranging a dust collection pipeline at the top of the dry method heavy medium separator and connecting the dust collection pipeline to the bag-type dust collector to reduce environmental pollution during the working of the dry method heavy medium separator.

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