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| Study on Oxidative Pressure Leaching of Arsenic from High As-Sb-bearing Dust with Sodium Hydroxide Solution |
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Received:January 05, 2020
Revised:January 05, 2020
Accepted:January 13, 2020
Published Online:August 17, 2020
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| DOI：doi：10.3969/j.issn.1007-7545.2020.09.020 |
| KeyWord:high As-Sb-bearing dust; arsenic; sodium hydroxide; oxygen pressure leaching; separation |
| Author | Institution |
| DONG Zhun-qin |
山东恒邦冶炼股份有限公司 |
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| Abstract: |
| Arsenic was leached from high As-Sb-bearing dust by oxidative pressure leaching with O2 as oxidant and sodium hydroxide as leaching agent. Effects of NaOH dosage, reaction temperature, O2 pressure, L/S, reaction time, and stirring speed on leaching rate of As and Sb were investigated. The results show that leaching rate of As and Sb is 93.54% and 0.73% respectively under the optimum conditions including NaOH dosage of 1.3 times of the theoretical amount, reaction temperature of 130 ℃, O2 pressure of 0.7 MPa, L/S of 4, reaction time of 120 min, and stirring speed of 600 r/min. |
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