Development of separation method for secondary copper and arsenic minerals using flotation

采用过氧化氢(H_2O_2)氧化和浮选相结合的方法研究了辉铜矿(次生铜矿)和辉铜矿(铜砷矿物)的分离。纯矿物和混合矿物的浮选试验表明，H_2O_2处理使辉铜矿和辉铜矿表面形成硫酸盐和氢氧化铜，降低了可浮性。尽管H_2O_2处理有不利的影响，但用于分离这两种矿物的H_2O_2浓度窗口很窄，辉石在此窗口中漂浮，辉铜矿被抑制。与辉铜矿相比，辉石对戊基黄药(KAX)的快速吸附和表面氧化程度的降低是导致这种选择性浮选行为的原因。

The separation of chalcocite (a secondary copper mineral) and enargite (a copper arsenic mineral) was studied using hydrogen peroxide (H2O2) oxidation treatment and flotation process. Flotation tests of pure and mixed minerals indicated that H2O2 treatment reduced the floatability of chalcocite and enargite by forming sulfate and copper hydroxide on their surfaces. Despite the detrimental effect of the H2O2 treatment, there was a narrow window of H2O2 concentration for separating both minerals, in which enargite floated and chalcocite was depressed. This selective flotation behavior was caused by the rapid adsorption of potassium amyl xanthate (KAX) and lower surface oxidation of enargite compared with that of chalcocite.