关键词: 金矿, 尼尔森重选, 包体金, 回收率, 自动化改造

Abstract: In order to further improve the gold recovery rate in Baguamiao Gold Mine，in view of the difficulty of efficient recovery of fine-grained gold，micro-fine-grained gold and inclusion gold in gold de‐ posits，systematic process optimization and equipment transformation are carried out by means of laborato‐ ry test and industrial test demonstration. Through the three-in-one technical integration of“vibrating screen transformation and efficiency improvement，one-stage regrinding of middle ore，shaking table sys‐ tem transformation and automation upgrading”，the slurry feeding amount of Nielsen gravity separation sys‐ tem is improved，the disposal mode of middle ore in shaking table is changed，the automation control level of equipment is improved，and the recovery problems of fine gold and wrapped gold are effectively solved. After the transformation，the comprehensive gold recovery rate of the gravity separation system is increased by 4.91 percentage points，the loss of gold resources is reduced，and the economic benefit is remarkable， which provides a referential technical path for similar mines.

Key words: gold mine, Nielsen gravity separation, inclusion gold, recovery rate, automation transfor‐ mation