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Effect of a Complex Surfactant on In Situ Leaching of Low Permeable Sandstone Uranium Deposits

[+] Author Affiliations
Kaixuan Tan, Jiang Liu, Yongxiang Huang

University of South China, Hengyang, Hunan, China

Paper No. ICONE20-POWER2012-54371, pp. 309-314; 6 pages
doi:10.1115/ICONE20-POWER2012-54371
From:
  • 2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference
  • Volume 4: Codes, Standards, Licensing, and Regulatory Issues; Fuel Cycle, Radioactive Waste Management and Decommissioning; Computational Fluid Dynamics (CFD) and Coupled Codes; Instrumentation and Controls; Fuels and Combustion, Materials Handling, Emissions; Advanced Energy Systems and Renewables (Wind, Solar, Geothermal); Performance Testing and Performance Test Codes
  • Anaheim, California, USA, July 30–August 3, 2012
  • Conference Sponsors: Nuclear Engineering Division, Power Division
  • ISBN: 978-0-7918-4498-4
  • Copyright © 2012 by ASME

abstract

The effect of a complex surfactant on in situ leaching of low permeable sandstone uranium deposits is discussed, based on an Agitation leaching and a column leaching experiments. The results of the Agitation leaching experiment show that adding different concentrations surfactant into leaching solutions increases significantly the leaching rate of uranium. For a surfactant concentration of 10 mg/l, the leaching rate of uranium reaches maximum 92.6%. The results of the column leaching experiment show that adding 10mg/L surfactant into leaching solutions increases the permeability coefficient of ore-bearing layer 28.8% and the leaching rate of uranium 58.0%, resulting in 85.79%. The results of kinetic analysis show that extraction of uranium is controlled by diffusion with apparent rate constant of 0.0023/d without adding surfactant and by surface chemical reaction with apparent rate constant of 0.0077/d with adding surfactant. Thus, for low permeable sandstone uranium deposit, the in situ leaching mining is of great potential if adding the complex surfactant into leaching solutions.

Copyright © 2012 by ASME

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