关键词: 高硫金矿, 金精矿, 再磨再选, 选矿指标

Abstract: The ore properties of a new mining area of a gold mine have changed. Now，the high-sul‐ fur gold mine containing more than 3% sulfur is explored. The gold minerals are mainly embedded in fine particles，which are closely related to pyrite symbiosis and no longer adapt to the original flotation process. In order to improve the indexes of mineral processing technology，the comparative test of mineral process‐ ing indexes of conventional flotation process and regrinding and re-concentration process is carried out. The test results show that the gold concentrate with yield of 7.69%，gold grade of 22.26 g/t and gold recov‐ ery of 82.25% can be obtained by using stage grinding and flotation process，one stage grinding fineness of -0.074 mm 80%，one roughing，two scavenging and one cleaning process，two stage concentrate regrind‐ ing fineness of -0.038 mm 90%，and two cleaning processes. The process meets the requirements of on�site beneficiation indexes.

Key words: high-sulfur gold ore, gold concentrate, re-grinding and re-separation, beneficiation index