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Title:
GAS-SOLID FLUIDIZED BED DRY SEPARATION PROCESS USING SEPARATION DENSITY GRADIENTS
Document Type and Number:
WIPO Patent Application WO/2020/199818
Kind Code:
A1
Abstract:
Provided is a gas-solid fluidized bed dry separation process using separation density gradients. In a gas-solid fluidized bed dry separation system, coarse particles (2) and fine particles (1) are selected as separating media, and the aerodynamics diameter ratio of the coarse particles (2) to the fine particles (1) is not greater than 10; the coarse particles (2) are placed at the bottom of the gas-solid fluidized bed dry separation system, the fine particles (1) are placed above the coarse particles (2), and the coarse particles (2) and the fine particles (1) are in a completely separated state under the initial condition; under the effect of airflow, the coarse particles (2) and the fine particles (1) begin to be fluidized to form a high-density separation region (5) and a low-density separation region (3), and the coarse particles (2) and the fine particles (1) are in a mixed state at a contact interface to form an intermediate density separation region (4); minerals to be separated are fed in from an upper portion of the gas-solid fluidized bed dry separation system and pass through the low-density separation region (3), the intermediate density separation region (4), and the high-density separation region (5) in sequence to complete mineral separation. By means of the density gradients formed by fluidizing the coarse and fine particles, mineral separation is enhanced, and the mineral separation efficiency is improved.

Inventors:
ZHAO YUEMIN (CN)
ZHU JESSE (CA)
ZHOU CHENYANG (CN)
FU ZHIJIE (CN)
LUO ZHENFU (CN)
DUAN CHENLONG (CN)
Application Number:
CN2020/077335
Publication Date:
October 08, 2020
Filing Date:
February 29, 2020
Export Citation:
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Assignee:
UNIV CHINA MINING (CN)
International Classes:
B07B7/01; B07B11/02; B07B11/04
Foreign References:
CN110293056A2019-10-01
CN105214956A2016-01-06
CN102921636A2013-02-13
CN107233995A2017-10-10
US20070193926A12007-08-23
Attorney, Agent or Firm:
NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD (CN)
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