Title:
MIXED RARE EARTH ORE CONCENTRATE SUSPENSION STATE ORE PHASE TRANSFORMATION-CLEAN LEACHING SYSTEM AND USE METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2024/093526
Kind Code:
A1
Abstract:
A mixed rare earth ore concentrate suspension state ore phase transformation-clean leaching system and a use method thereof, relating to the field of ore dressing and metallurgy and the field of comprehensive resource recovery. The system comprises a Venturi dryer (4), multiple stages of separators, a suspension preheating decomposition furnace (7), multiple stages of fluidization sealing valves, an ore phase transformation device (11), a ball mill (17), multiple stages of acid leaching tanks, an alkali leaching tank (21), and a neutralization tank (26). The use method of the system comprises: preheating mixed rare earth ore concentrate powder, placing a material in the suspension preheating decomposition furnace (7) so that the material undergoes preheating decomposition and is in a suspension state, performing cyclone separation and then making the material enter the ore phase transformation device (11) for ore phase transformation, performing ball milling and pickling, performing alkali decomposition on acid leaching residues, performing secondary acid leaching on an acid liquid, neutralizing a leached product, and then obtaining neutralization slag. The system can achieve low-temperature phasing transformation of rare earth ores, avoid production of tetravalent cerium in an ore phase transformation product, and increase the rare earth leaching rate, and can also prevent production of fluorine and chlorine waste gas.
Inventors:
GAO PENG (CN)
YUAN SHUAI (CN)
NING JILAI (CN)
HAN YUEXIN (CN)
LI YANJUN (CN)
SUN YONGSHENG (CN)
LI WENBO (CN)
YUAN SHUAI (CN)
NING JILAI (CN)
HAN YUEXIN (CN)
LI YANJUN (CN)
SUN YONGSHENG (CN)
LI WENBO (CN)
Application Number:
PCT/CN2023/117725
Publication Date:
May 10, 2024
Filing Date:
September 08, 2023
Export Citation:
Assignee:
UNIV NORTHEASTERN (CN)
International Classes:
C22B59/00; C22B1/00; C22B3/02; C22B3/10
Foreign References:
| CN115637340A | 2023-01-24 | |||
| CN111500852A | 2020-08-07 | |||
| CN112410588A | 2021-02-26 | |||
| CN111876616A | 2020-11-03 | |||
| CN102212674A | 2011-10-12 | |||
| US20210310100A1 | 2021-10-07 | |||
| CN102277483A | 2011-12-14 | |||
| CN105543509A | 2016-05-04 |
Attorney, Agent or Firm:
SHENYANG DONGDA INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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