四川某中基性岩浆岩型金矿选别试验研究

对四川省某岩浆岩型原生金矿（金品位为4.92×10^-6）进行工艺矿物学和选别试验研究。该原生金矿为毒砂、黄铁矿化蚀变中基性岩浆岩型金矿，金属矿物以黄铁矿为主，其次为毒砂，脉石矿物主要为蚀变矿物，以白云母为主，其次为次闪石。该矿采用常规的炭浸及全泥氰化浸出时浸出率较低。根据该矿石工艺矿物学性质，在粗磨细度为-0.074 mm含量占58.2%条件下，经一粗、一精、一扫选别，精选尾矿和扫选精矿集中返回粗选的闭路浮选试验，能获得金品位56.6×10^-6、金回收率为96.43%的金精矿，尾矿中金品位仅为0.19×10^-6，浮选所获金精矿属高砷、高硫金精矿。

Research on the Beneficiation Tests of Mafic Igneous Rock Type Gold Deposit in Sichuan Province

This paper described the process mineralogy and beneficiation tests research on a magmatic rocks native gold mine of the grade is 4.92×10^-6.The native gold is magmatic rocks type gold mine mineralized with arsenopyrite and pyrite，metal minerals are mainly pyrite and arsenopyrite，gangue minerals are mainly altered minerals，such as white mica and amphibole.It is difficult to leach with conventional carbon leaching and all slime cyanide leaching.Under the grinding fineness is 58.2% below 0.074 mm，by once roughing，once cleaning，once scavenging，cleaning tailings and scavenging concentrates combine return roughing，closed-circuit flotation experiment is carried out，gold concentrates containing 56.6×10^-6 Au with recovery of 96.43%，gold tailings is only 0.19×10^-6 are obtained.The flotation gold concentrate are high arsenic and sulfur.