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| Arsenic Recovery from Refractory As-bearing Gold Ore with Hydrometallurgy Process |
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Received:November 09, 2011
Revised:November 10, 2011
Accepted:November 10, 2011
Published Online:April 23, 2012
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| DOI：doi：10.3969/j.issn.1007-7545.2012.05.003 |
| KeyWord:refractory As-bearing gold ore; hydrometallurgy; arsenic recovery; environmental protection; safety |
| Author | Institution |
| GUO Chi-hao |
北京矿冶研究总院 |
| LI Yun |
冶金所 |
| WANG Yun |
北京矿冶研究总院 |
| YUAN Chao-xin |
北京矿冶研究总院 |
| Liu Da-xue |
北京矿冶研究总院 |
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| Abstract: |
| Solubility of As2O3 in dilute sulfuric acid solution and grain size of As2O3 crystals generated from hydrometallurgy process was investigated, and the factors effecting As precipitation with Na2S were studied. The results show that minimum solubility of As2O3 is reached in dilute sulfuric acid with concentration of 60%, and average grain size of As2O3 crystals is about 25.13 μm. The optimum conditions for As2O3 precipitation with Na2S including S/As=3.75, reaction time of 120 min, ambient temperature, and two step charging of Na2S. A new, safe and environmental friendly hydrometallurgy process is put forward to recover As from refractory As-bearing gold ore. |
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