Experiment study on dressing of a refractory ore containing arsenic and antimony in Gansu
In response to the low separation index during the on-site flotation process of a refractory ore containing arsenic and antimony in Gansu,a study on ore process mineralogy was conducted.Based on this,experiments were car-ried out on gravity separation,flotation,regrinding and re-separation of middlings,and cyanide leaching of flotation tail-ings,ultimately forming a combined process of Nelson gravity separation,middlings regrinding and re-separation,and tailings cyanide leaching.Using this process,the gold grade of the concentrate can reach50.05 g/t,with a gold compre-hensive recovery rate of 93.89%.Compared to the single flotation process,the gold recovery rate of this combined process has increased by more than 30%,providing a feasible technical solution for on-site process optimization.
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