Volume 8 Issue 1
Jan.  2018
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Article Navigation >  Journal of Environmental Engineering Technology  > 2018  >  8(1): 98-103
GUO Qiusong, LIU Zhiqiang, ZHU Wei, ZHANG Kuifang. Research on cobalt and vanadium leaching toxicity reduction of dumped sludge from heterogenite hydrometallurgy process[J]. Journal of Environmental Engineering Technology, 2018, 8(1): 98-103. doi: 10.3969/j.issn.1674-991X.2018.01.013
Citation: GUO Qiusong, LIU Zhiqiang, ZHU Wei, ZHANG Kuifang. Research on cobalt and vanadium leaching toxicity reduction of dumped sludge from heterogenite hydrometallurgy process[J]. Journal of Environmental Engineering Technology, 2018, 8(1): 98-103. doi: 10.3969/j.issn.1674-991X.2018.01.013
shu

Research on cobalt and vanadium leaching toxicity reduction of dumped sludge from heterogenite hydrometallurgy process

doi: 10.3969/j.issn.1674-991X.2018.01.013

  • 1. Guangdong Research Institute of Rare Metals, Guangzhou 510650, China

  • 2. Guangdong Province Key Laboratory of Rare Earth Development and Application, Guangzhou 510650, China

  • Received Date: 2017-07-12
  • Publish Date: 2018-01-20
    Abstract
  • In order to reduced cobalt and vanadium leaching toxicity of dumped sludge in heterogenite hydrometallurgy process, the electric-assistant acid leaching process was investigated. The influence of the electric-assistant acid leaching time, liquid-solid ratio, sulfuric acid concentration and electric current density on decreasing leaching toxicity was studied intensively. The results shows that under the condition of electric-assistant leaching time 120 min, sulfuric acid concentration 600 mg/L, liquid-solid ratio 10:1(mL/g) and electric current density 200 A/m 2, the leaching toxicity of heavy metals such as cobalt, vanadium, copper, manganese and nickel has reduced obviously. After treatment by horizontal vibration method and sulphuric acid and nitric acid method, the cobalt leaching toxicity decreased by 99.1% and 98.8%, while the vanadium leaching toxicity decreased by 91.7% and 95.1% respectively. Therefore, the leaching toxicity of dumped sludge from heterogenite hydrometallurgy process was reduced efficiently, and the valuable elements were recovered and utilized successfully.

     

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