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| Treatment of Flotation Tailings of High-Sulfur Slag by Distillation and Ozone Acid Leaching |
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Received:October 14, 2022
Revised:October 21, 2022
Accepted:October 27, 2022
Published Online:February 13, 2023
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| DOI：doi：10.3969/j.issn.1007-7545.2023.03.003 |
| KeyWord:flotation tailings of high sulfur slag; recovery of elemental sulfur; ozone oxidation; comprehensive recovery of valuable metals |
| Author | Institution |
| ZHANG Deng-li |
东北大学 冶金学院 |
| ZHANG Qin |
多金属矿生态冶金重点实验室 东北大学 |
| LIU Chun-wang |
东北大学 冶金学院 |
| GAO Han-jie |
东北大学冶金学院 |
| TAO Le |
东北大学 冶金学院 |
| YANG Hong-ying |
多金属矿生态冶金重点实验室 东北大学 |
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| Abstract: |
| The process of distillation, ozone oxidation, sulfuric acid leaching was put forward to treat flotation sulfur tailings from oxygen pressure zinc leaching. The main treatment methods are distillation to recover elemental sulfur, ozone oxidation-dilute sulfuric acid leaching to recover valuable elements from flotation sulfur tailings. The recovery rate of sulfur element in flotation tailings can reach 92% above under the conditions including temperature of 400 ℃, distillation time of 0.5 h, and carrier gas flow rate of 400 mL/min. Ozone can promote the leaching of Fe, Cu, As, Zn and other elements in sulfur tailings. The leaching rate of Fe, Cu, As and Zn is 73.08%, 90.97%, 89.69% and 99.03% respectively under the conditions including temperature of 80 ℃, time of 2 h, L/S=6, oxygen flow of 400 mL/min, sulfuric acid concentration of 1.6 mol/L, and stirring speed of 400 r/min. |
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