Title:
SYSTEM AND METHOD FOR PREPARING ULTRAFINE SILICA BY LEACHING SILICATE ORE USING HYDROGEN CHLORIDE GAS
Document Type and Number:
WIPO Patent Application WO/2020/206892
Kind Code:
A1
Abstract:
Provided is a system for preparing silica by leaching silicate ore using hydrogen chloride gas, comprising an ore raw material feeding device, an ejector (4), a stirring tank (6) and a liquid-solid separation device (7); a material circulating outlet of the stirring tank (6) is in communication with a liquid inlet of the ejector (4) by means of a circulating pipeline; a liquid outlet of the ejector (4) is in communication with a material circulating inlet of the stirring tank (6); a material outlet of the raw material feeding device is in communication with the circulating pipeline; a circulating pump (5) is provided on the circulating pipeline; and the material circulating outlet of the stirring tank is in communication with the liquid-solid separation device (7). Further provided is a method for preparing silica from silicate ore powder and hydrogen chloride gas by using the described system. The described system and method provide a feasible industrialized solution for preparing silica by means of the continuous leaching of silicate ore. By means of using an ejector and employing a means of directly dissolving hydrogen chloride gas in a silicate circulating slurry, due to the initial contact between the slurry having high concentration and high dispersion in the ejector and a hydrochloric acid solution having a high concentration, the dissolution efficiency of the ore and the utilization rate of hydrochloric acid are improved.
Inventors:
YU CHANGJUN (CN)
WANG QI (CN)
WANG QI (CN)
Application Number:
PCT/CN2019/100145
Publication Date:
October 15, 2020
Filing Date:
August 12, 2019
Export Citation:
Assignee:
YUANCHU TECH BEIJING CO LTD (CN)
International Classes:
C01B33/193
Foreign References:
| CN109850911A | 2019-06-07 | |||
| CN101312908A | 2008-11-26 | |||
| CN101312908A | 2008-11-26 | |||
| CN1133586A | 1996-10-16 | |||
| CN101249965A | 2008-08-27 | |||
| JPH04224107A | 1992-08-13 | |||
| GB460410A | 1937-01-27 |
Other References:
See also references of EP 3954654A4
Attorney, Agent or Firm:
TOWIN INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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