Selective flotation of chalcopyrite and molybdenite with H2O2 oxidation
Selective flotation of chalcopyrite and molybdenite with H2O2 oxidation
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DOI：
10.1016/j.mineng.2016.10.007
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发表时间：
2017
影响因子：
4.8
通讯作者：
T. Hirajima;H. Miki;G. Suyantara;H. Matsuoka;A. Elmahdy;K. Sasaki;Yuji Imaizumi;Shigeto Kuroiwa
中科院分区：
文献类型：
--
作者：
T. Hirajima;H. Miki;G. Suyantara;H. Matsuoka;A. Elmahdy;K. Sasaki;Yuji Imaizumi;Shigeto Kuroiwa
采用臭氧(O_3)和过氧化氢(H_2O_2)对黄铜矿(CuFeS_2)和辉钼矿(MoS_2)进行了表面氧化处理。结果表明，氧化处理对黄铜矿和辉钼矿的润湿性有不同的影响。单矿物浮选结果表明，与臭氧处理相比，双氧水处理对辉钼矿和黄铜矿具有更高的分离选择性。接触角测量和X射线光电子能谱(XPS)分析结果表明，经H_2O_2处理后的黄铜矿表面由于氧化铁和铜的表面沉积而变得亲水。另一方面，高浓度过氧化氢处理后辉钼矿的接触角略有增加。这项工作提出了这种现象的可能机制。此外，还讨论了各种氧化方法的分离选择性。采用块状铜钼精矿进行的浮选试验表明，双氧水的浮选效果与传统的NaHS浮选铜钼相当。
The selective flotation of chalcopyrite (CuFeS2) and molybdenite (MoS2) was studied using surface oxidation treatments (i.e., ozone (O3) and hydrogen peroxide (H2O2)). The results indicated that the oxidation treatments had different effects on the wettability of chalcopyrite and molybdenite. Single mineral flotation results showed that the H2O2treatment had higher separation selectivity for molybdenite and chalcopyrite compared with that of the ozone treatment. The contact angle measurement and X-ray photoelectron spectroscopy (XPS) analysis results showed that the chalcopyrite surface became hydrophilic owing to the surface deposition of oxidized iron and copper after the H2O2treatment. On the other hand, the contact angle of molybdenite slightly increased following the H2O2treatment at high concentrations. Possible mechanisms of this phenomenon were proposed in this work. Moreover, the separation selectivity of each oxidation method was discussed. Flotation tests using bulk Cu-Mo concentrate showed that H2O2could deliver a flotation result comparable to conventional Cu-Mo flotation using NaHS.