Volume 8 Issue 1
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Article Navigation >  Journal of Environmental Engineering Technology  > 2018  >  8(1): 92-97
PAN Yueyi, YANG Yufei, HUANG Qifei, YANG Jinzhong, ZHANG Jing, HU Shuanglin. Research on silicon and aluminum impurity removal from waste polishing powder[J]. Journal of Environmental Engineering Technology, 2018, 8(1): 92-97. doi: 10.3969/j.issn.1674-991X.2018.01.012
Citation: PAN Yueyi, YANG Yufei, HUANG Qifei, YANG Jinzhong, ZHANG Jing, HU Shuanglin. Research on silicon and aluminum impurity removal from waste polishing powder[J]. Journal of Environmental Engineering Technology, 2018, 8(1): 92-97. doi: 10.3969/j.issn.1674-991X.2018.01.012
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Research on silicon and aluminum impurity removal from waste polishing powder

doi: 10.3969/j.issn.1674-991X.2018.01.012

  • 1. Institute of Soil and Solid Waste, Chinese Research Academy of Environmental Sciences, Beijing 100012, China

  • 2. School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China

  • 3. National Working Committee on Disposal and Utilization of Hazardous Waste, China National Resources Recycling Asscociation,Beijing 100012, China

More Information
  • Corresponding author: Yufei YANG E-mail: yangyf@craes.org.cn
  • Received Date: 2017-06-20
  • Publish Date: 2018-01-20
    Abstract
  • In order to recover rare earth efficiently from waste polishing powder, it is necessary to remove the silicon and aluminum impurities firstly. The removal of these impurities from the waste polishing powder by NaOH solution was investigated. The effects of alkali ratio (mass ratio of alkali to waste polishing powder), leaching time, leaching temperature and NaOH concentration were studied. As the results illustrate, alkali ratio and leaching time exert greater effects on the removal rate of silicon and aluminum impurities. When the waste polishing powder was leached under the conditions of alkali ratio of 1.0, 90 min, 90 ℃ and NaOH solution concentration of 1.00 mol/L, the leaching efficiency of silicon and aluminum was as high as about 95.37% and 97.93%, respectively.

     

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