Title:
METHOD FOR PRE-SELECTION AND DISCARDING AND REDUCING OVER-GRINDING OF GOLD ORES
Document Type and Number:
WIPO Patent Application WO/2024/045687
Kind Code:
A2
Abstract:
A method for pre-selection and discarding and reducing over-grinding of gold ores. Firstly, settled sand of a cyclone in a gold ore grinding and classification closed-loop circulation system is sieved and classified to obtain a coarse-grained ore, an intermediate-grained mineral and a fine-grained mineral; the coarse-grained mineral is then returned to a ball mill for regrinding, the intermediate-grained mineral is introduced into a dense-medium sorting system, so as to obtain a dense-medium sorted tailing, which is treated as waste rock, and a dense-medium sorted concentrate, which is returned to the ball mill for regrinding; and finally, the fine-grained mineral is subjected to flash flotation, so as to obtain a high-grade gold concentrate as a product, and a flash flotation tailing, which is returned to the ball mill for regrinding. The method can achieve efficient separation between a main useful mineral and a gangue mineral in a gold mine, and significantly reduce the amount of ores entering the flotation process; and useful minerals dissociated by a monomer in an ore grinding and classification closed loop can further be floated in advance, which prevents this portion of minerals from being continuously circulated and accumulated during a cyclone classification process due to large specific gravity, and prevents the Au recovery rate from being affected by over-grinding.
Inventors:
XU CHAO (CN)
LI GUANGSHENG (CN)
ZHU XINGFU (CN)
CAI MINGMING (CN)
LU ZHONGBO (CN)
CHEN YANBO (CN)
JI QIANG (CN)
ZHANG JUNTONG (CN)
GAO TENGYUE (CN)
QIN GUANGLIN (CN)
LI GUANGSHENG (CN)
ZHU XINGFU (CN)
CAI MINGMING (CN)
LU ZHONGBO (CN)
CHEN YANBO (CN)
JI QIANG (CN)
ZHANG JUNTONG (CN)
GAO TENGYUE (CN)
QIN GUANGLIN (CN)
Application Number:
PCT/CN2023/092980
Publication Date:
March 07, 2024
Filing Date:
May 09, 2023
Export Citation:
Assignee:
METALLURGICAL LABORATORY BRANCH OF SHANDONG GOLD MINING TECH CO LTD (CN)
International Classes:
B03B7/00
Attorney, Agent or Firm:
YANTAI SHUANGLIAN PATENT FIRM (ORDINARY PARTNERSHIP) (CN)
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