Sustainable Mining and Metallurgy

With the increase of mining depth in Baguamiao mining area, the properties of raw ore have changed, especially the gold content of each particle size of raw ore has changed, and the original concentrate treatment process has been unable to meet the on-site production. Based on the analysis and comparison of the mineral composition, natural gold output form, shape and particle size of the upper ore and the deep ore, this paper put forward the reconstruction scheme of Nelson ore machine process gravity separation. Aiming at the comprehensive recovery and utilization of Nelson concentrate, the optimal treatment method was determined by comparing the schemes of leaching, flotation and regrinding. After the traditional shaking table separation of Nielsen gold concentrate, the grade of medium tailings is high. Through the automatic control system, the multi-batch and small-batch return to the production system for regrinding and re-separation can not only maintain a high recovery rate, but also eliminate the impact of high-grade tailings on the production system. Compared with the leaching and flotation recovery methods, the existing processes and equipment are better utilized, the cost of beneficiation is reduced, and better economic benefits are achieved.