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| Comprehensive Recovery of Arsenic from Gold Ore Slag |
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Received:May 24, 2011
Published Online:December 06, 2011
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| DOI：doi：10.3969/j.issn.1007-7545.2011.12.004 |
| KeyWord:Arsenic slag; Sodium hydroxide; Leaching; Arsenic |
| Author | Institution |
| SUN Guang-yong, WANG Wei-ting, YANG Jun, YANG Xuan, ZHANG Yong-kui |
四川大学化学工程学院 |
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| Abstract: |
| With bio-oxidation gold ore slag as the raw material, arsenic was recycled from the slag. In the arsenic leaching test, four factors had been studied including the usage of sodium hydroxide, leaching temperature, the ratio of liquid to solid(L/S), and leaching time. In the arsenic precipitate test, three factors including the initial solution pH, the mole ratio between Ca and As and the reaction time had been studied. The optimum conditions for arsenic leaching include the optimal amount of NaOH of 240g/L, 60 ℃, L/S= 4/1, 2 h. Under the optimum conditions, the leaching rate of arsenic was 85%. The optimum conditions for arsenic precipitating include the initial solution pH of 12.0 and the mole ratio between Ca and As of 2∶1, 30 min, under which more than 97% of arsenic would be precipitated. |
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