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Journal of Radioanalytical and Nuclear Chemistry

, Volume 322, Issue 2, pp 597–604 | Cite as

Selective extraction of uranium from uranium–beryllium ore by acid leaching

  • Peiwen Wang
  • Eming Hu
  • Qingliang WangEmail author
  • Zhiwu Lei
  • Hongqiang Wang
  • Yan Zhang
  • Wei Hou
  • Rui Zhang
Article

Abstract

Both uranium and beryllium are very important strategic metals and have been applied to many fields, such as nuclear industries, atomic energy, metallurgical industries and telecommunications industries. When uranium and beryllium in the ore were leached simultaneously, a complicated downstream separation process was needed. Based on the different chemical stabilities of uranium and beryllium, an acid leaching method was employed in this work to selectively extract uranium from uranium–beryllium ore. The effects of sulfuric acid concentration, temperature, liquid–solid ratio and leaching time on the leaching efficiency were studied experimentally. Results indicated that treatment of the ores in 0.2 M sulfuric acid at 348.5 K for 50 min with the solid–liquid ratio of 0.25 g/mL is optimum. Under optimal conditions, the leaching efficiencies of uranium is 97.4% and the leaching efficiencies of beryllium is 1.78%, and the standard deviation of them are less than 2% and 0.06%, respectively. Results of kinetic study suggest that the leaching process of uranium was thermodynamically favorable and was controlled by the diffusion of the product layer, whereas the rate-determining step for beryllium leaching is the surface chemical reaction.

Keywords

Uranium–beryllium ore Selective leaching Uranium and beryllium separation Kinetics 

Notes

Acknowledgement

This work was supported by the Cooperative Innovation Center for Nuclear Fuel Cycle Technology and Equipment [Grant No. 2019KFZ03].

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  • Peiwen Wang
    • 1
  • Eming Hu
    • 1
    • 2
  • Qingliang Wang
    • 1
    • 2
    Email author
  • Zhiwu Lei
    • 1
    • 2
  • Hongqiang Wang
    • 1
  • Yan Zhang
    • 3
  • Wei Hou
    • 1
  • Rui Zhang
    • 1
  1. 1.School of Resource and Environment and Safety EngineeringUniversity of South ChinaHengyangChina
  2. 2.Cooperative Innovation Center for Nuclear Fuel Cycle Technology and EquipmentUniversity of South ChinaHengyangChina
  3. 3.Department of Process EngineeringMemorial University of NewfoundlandSt. John’sCanada

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