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| Experiment research on tungsten leaching from black-white tungsten concentrate ore by hot pressure-leach |
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Received:April 29, 2012
Revised:September 22, 2012
Accepted:May 04, 2012
Published Online:November 26, 2012
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| DOI： |
| KeyWord:Leach; Caustic soda; Hot pressure; Black-white tungsten concentrate ore |
| Author | Institution |
| KOU Bao-ming |
Research and Design Institute of Yunnan Tin Holiding Limited Company,Yunnan Gejiu |
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| Abstract: |
| Experiment research on tungsten leaching have been investigated from black-white tungsten concentrate ore by hot pressure-leach, influence factors of alkali ore ratio, caustic soda, liquid-solid ratio, oxygen pressure, leaching temperature and leaching time on tungsten leach have been mainly analyzed. The results show that tungsten leach ratio was increased with alkali ore ratio added from 20% to 45%. Tungsten leach ratio was also increased with caustic soda addition, when caustic soda addition was highly than 390g, tungsten leach ratio was reached to above 93%. With liquid-solid ratio increased, tungsten leach ratio was increased from 87.43% to above 95%, but the optimization of liquid-solid ratio was at 3:1 which can improve the leaching ability of concentrate ore. Oxygen addition was not beneficial for tungsten leaching, the optimization of leaching temperature and leaching time was at 160℃ and 1h, respectively, while tungsten leach ratio was 95.55%. |
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