Influence of mechanical activation on the alkaline leaching of enargite concentrate
作者： P. Baláž , M. Achimovičová , Z. Bastl , T. Ohtani , M. Sánchez
DOI: 10.1016/S0304-386X(99)00071-7
关键词: Chemistry 、 Chemical reaction 、 X-ray photoelectron spectroscopy 、 Enargite 、 Ball mill 、 Chemical engineering 、 Arsenic 、 Metallurgy 、 Covellite 、 Activation energy 、 Leaching (metallurgy)
摘要: Abstract In this study the alkaline leaching of enargite Cu3AsS4 (El Indio, Chile) in medium sodium sulphide was investigated. The rate can be influenced by pre-treatment consisting mechanical activation concentrate a stirring ball mill (attritor). XRD and XPS methods used to characterise bulk surface properties solid phase after have shown that arsenic extraction from leads its transformation covellite CuS. On basis value experimental energy (62 kJmol−1) we conclude chemical reaction is rate-determining process between Na2S. applied procedure represents potentionality de-arsenification sulphidic concentrates preparation charge convenient for further processing, e.g., pyro-treatment.
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