Effect of hydrogen peroxide on selective flotation of chalcocite and enargite
Effect of hydrogen peroxide on selective flotation of chalcocite and enargite
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DOI：
10.1016/j.ijmst.2023.01.002
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发表时间：
2023-03
影响因子：
11.8
通讯作者：
G. Suyantara;Daniyarov Berdakh;H. Miki;T. Hirajima;K. Sasaki;D. Ochi;Yuji Aoki
中科院分区：
文献类型：
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作者：
G. Suyantara;Daniyarov Berdakh;H. Miki;T. Hirajima;K. Sasaki;D. Ochi;Yuji Aoki
硫砷铜矿通常与辉铜矿伴生。由于这些矿物的浮选行为的相似性，据报道，这两种矿物在常规浮选回路中富集。但硫砷铜矿中的无机砷会降低铜精矿质量，增加铜精矿的加工成本。分离这些矿物对于更清洁的铜生产非常重要，以避免这些影响。在此背景下，本研究探讨了过氧化氢（H2O2）处理对辉铜矿和硫砷铜矿浮选行为的影响。纯矿物和混合矿物的浮选试验表明，H2O2处理通过在辉铜矿和硫砷铜矿表面生成硫酸盐和氢氧化铜，降低了它们的可浮性。尽管H2O2处理的不利影响，有一个狭窄的窗口，H2O2浓度分离两种矿物，其中硫砷铜矿浮动和辉铜矿被抑制。这种选择性浮选行为是由于戊基黄药钾（KAX）的快速吸附和硫砷铜矿较低的表面氧化所致。
Enargite is typically associated with chalcocite. Owing to the similarity in the flotation behaviors of these minerals, both minerals are reported to concentrate in the conventional flotation circuit. However, inorganic arsenic in enargite can decrease the copper concentrate quality and increase the operating cost of processing this concentrate. Separating these minerals is important for cleaner copper production to avoid these effects. In this context, this study investigated the effect of hydrogen peroxide (H2O2) treatment on the flotation behavior of chalcocite and enargite. Flotation tests of pure and mixed minerals indicated that H2O2treatment reduced the floatability of chalcocite and enargite by forming sulfate and copper hydroxide on their surfaces. Despite the detrimental effect of the H2O2treatment, there was a narrow window of H2O2concentration 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.