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| Arsenic Removal from Arsenic-rich Lead Anode Slime by Atmospheric-pressure Alkaline Leaching Process |
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Received:May 22, 2020
Revised:May 27, 2020
Accepted:May 29, 2020
Published Online:July 17, 2020
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| DOI：doi：10.3969/j.issn.1007-7545.2020.08.002 |
| KeyWord:lead anode slime; arsenic removal; oxygen pressure leaching; alkaline leaching |
| Author | Institution |
| FU Wei-qin |
昆明冶金研究院有限公司 |
| LIU Jun-chang |
昆明冶金研究院有限公司 |
| ZOU Wei |
昆明冶金研究院有限公司 |
| MU Xing-bing |
昆明冶金研究院有限公司 |
| XIE Tian-jian |
昆明冶金研究院有限公司 |
| ZHAI Zhong-biao |
昆明冶金研究院有限公司 |
| YANG Da-jin |
云南驰宏锌锗股份有限公司 |
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| Abstract: |
| Arsenic-rich lead anode slime was treated by atmospheric-pressure two stage countercurrent alkaline leaching for high-efficient leaching of arsenic. Effects of leaching temperature, leaching time, oxygen pressure, and sodium hydroxide concentration on arsenic removal rate were studied. Arsenic removal rate is 99% above under the optimum conditions of atmospheric alkaline leaching including liquid-solid volume-mass ratio of 5 mL/g, leaching temperature of 80 ℃, leaching time of 0.5 h. The optimum oxygen pressure alkaline leaching conditions include liquid-solid volume-mass ratio of 5 mL/g, sodium hydroxide concentration of 130 g/L, oxygen pressure leaching temperature of 140 ℃, oxygen pressure leaching time of 4.0 h, oxygen pressure of 1.0 MPa, and stirring speed of 600 r/min. |
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