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| REDUCTIVE ACID LEACHING OF NEUTRAL LEACHING RESIDUE |
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Received:September 25, 2013
Revised:October 09, 2013
Accepted:October 10, 2013
Published Online:April 20, 2015
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| DOI： |
| KeyWord:high-iron sphalerite; neutral leaching residue; reductive acid leaching; leaching efficiency |
| Author | Institution |
| CHEN Xian-you |
Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology |
| DENG zhi-gan |
Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology |
| WEI chang |
Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology |
| LI cun-xiong |
Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology |
| ZHU Bei-ping |
Yunnan Hualian Zinc and Indium Co Ltd Wenshan |
| CAO Yuan-qing |
Yunnan Hualian Zinc and Indium Co Ltd Wenshan |
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| Abstract: |
| In order to recycle the valuable metal in neutral leaching residue, the test of reductive acid leaching on neutral residue mixed with zinc concentrate with high-iron sphalerite as the research object has been taken in the paper. The effecting factors such as mass ratio of neutral residue and zinc concentrate、initial concentration of sulfuric acid、reaction time、liquid-solid ratio、temperature on leaching efficiency of Zn、Fe has been studied in detail and finally we obtain the best technical parameters: mass ratio of neutral residue and zinc concentrate 1:0.25, initial concentration of sulfuric acid 220g/L, reaction time 3h, liquid-solid ratio 6:1, temperature 90℃. The results showed that the leaching efficiency of zinc and iron were over 96%, besides, nearly 95% Fe was Fe2 in the leaching solution under the optimal conditions. |
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