METHOD FOR PRE-SELECTION AND DISCARDING AND REDUCING OVER-GRINDING OF GOLD ORES

• Main Authors: GAO, Tengyue, JI, Qiang, ZHANG, Juntong, QIN, Guanglin, XU, Chao, CAI, Mingming, ZHU, Xingfu, LI, Guangsheng, LU, Zhongbo, CHEN, Yanbo
• Format: Patent
• Language: Chinese; English; French
• Published: 18.04.2024
• Subjects: MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS; PERFORMING OPERATIONS; SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS; SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; TRANSPORTING

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 flotatio