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| Study on pre-treatment process of arsenic removal for bismuth-rich lead anode slime |
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Received:November 27, 2014
Revised:December 03, 2014
Accepted:December 04, 2014
Published Online:December 29, 2015
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| DOI： |
| KeyWord:bismuth-rich lead anode slime; roasting；alkali leaching; arsenic removal |
| Author | Institution |
| LI Kuo |
State Key Laboratory of Complex Nonferrous Metal Resources Cleaning Utilization |
| XU Rui-dong |
State Key Laboratory of Complex Nonferrous Metal Resources Cleaning Utilization |
| HE Shi wei |
kunming university of science and technology |
| CHEN Han sen |
kunming university of science and technology |
| ZHU Yun |
kunming university of science and technology |
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| Abstract: |
| Abstract: Sodium carbonate roasting and alkali leaching process was used to remove arsenic from bismuth-rich lead anode slime. The effect of those factors including roasting temperature, ratio of liquid to solid, Na2CO3 dosage, oxidant dosage and NaOH concentration on arsenic removal were investigated, and the optimal process conditions were determined. The results show that the leaching rate of arsenic can reach 95% under these conditions of roasting temperature 400℃, liquid-solid ratio 5:1, Na2CO3 dosage 40%, oxidant dosage 10% and NaOH concentration 120g/L. The cyclic utilization of alkaline leaching solution and removal of arsenic can be realized through the method that, filtering crystals after cooling alkaline leaching solution; finally, return such solution to leaching process after adding quantitative sodium hydroxide. |
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