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首页> 外文会议>XXI International Mineral Processing Congress >SURFACE PROPERTIES AND FLOATABILITY OF ENARGITE
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SURFACE PROPERTIES AND FLOATABILITY OF ENARGITE

机译：钠辉石的表面性质和可浮性

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The surface properties and floatability of enargite (Cu_3AsS_4) have been investigated through measurements of zeta potentials, enargite electrode rest potentials, and Hallimond tube flotation tests. The zeta potential-pH curves showed negative values (-20 mV to -45 mV) from pH = 2 to pH = 12, but with two peaks around pH = 5.5 and pH = 11. From thermodynamic equilibrium diagrams for the As-H_2O system and Eh-pH diagram for enargite, it is postulated that the charged groups on the enargite surface are derived from the equilibrium reactions of the thioarsenate groups. Natural floatability of enargite was discarded in the pH range studied; however, flotation recovery greater than 80% were achieved with 0.1 mg/1 isopropyl xanthate at pH = 10. This suggests that the surface composition of the enargite/solution interface is governed by the chemistry of thio-arsenates, which make enargite floatability different to all other copper sulfides. Its resistance to be depressed by oxidizing agents was remarkable.
机译：锌矿（Cu_3AsS_4）的表面性质和浮性已通过测量ζ电位，镁矿电极静止电位和Hallimond管浮选试验进行了研究。从pH = 2到pH = 12，Zeta电位-pH曲线显示为负值（-20 mV至-45 mV），但在pH = 5.5和pH = 11附近有两个峰。从As-H_2O系统的热力学平衡图中以及钠辉石的Eh-pH图，推测该钠辉石表面的带电基团是由硫代砷酸盐基团的平衡反应衍生而来的。在所研究的pH范围内，失去了天然的浮辉性。但是，在pH = 10的条件下，使用0.1 mg / 1异丙基黄药生成的浮选回收率大于80％。这表明，辉石/溶液界面的表面组成受硫代砷酸盐的化学性质的控制，这使浮辉性与所有其他硫化铜。其抗氧化剂降低的能力非常显着。

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