关键词: 石英脉型微细粒嵌布低品位金矿石, 浮选, 浮选尾矿氰化浸出, 浮选精矿焙烧&mdash, 氰化浸出

Abstract: In order to provide the basis for development and utilization of a quartz vein type micro-fine disseminated low-grade gold ore, and according to the nature of the ore, beneficiation tests were made by adopting the process of flotation-cyanide leaching of flotation tailings-cyanide leaching after roasting of flotation concentrate. The results showed that: through flotation and cyanide leaching of tailings, gold concentrate with Au grade of 61.88 g/t, As content of 4.21% and Au recovery of 77.57% and tailing leaching solution with gold leaching rate of 75.85% and gold recovery rate to the raw ore of 17.02% were separately obtained. Total gold recovery from both above reached 94.59%. Through roasting pre-treatment of gold concentrate, arsenic content in roasting dropped to 0.38%, and gold grades reached 88.40 g/t; Gold leaching rate was up to 93.28% by roasting and cyanide leaching, and gold recovery to the raw ore was 72.36%. Total gold recovery from roasting of gold concentrate and cyanide leaching of flotation tailings was 89.38%.

Key words: Quartz vein-type micro-fine disseminated low-grade gold ore, Flotation, Cyanide leaching of flotation tailings, Roasting-cyanide leaching of flotation concentrate