NUCLEAR TECHNIQUES, Volume. 45, Issue 12, 120301(2022)

Effect of mineral composition change on pore blockage in the process of acid in-situ leaching of uranium

Sheng ZENG*, Hao LI, Chunguang LI, and Jiayin SONG
Author Affiliations
  • School of Resources Environment and Safety Engineering, University of South China, Hengyang 421001, China
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    Figures & Tables(7)
    Change of porosity during in-situ leaching
    The correlation between mineral composition and porosity
    The correlation between mineral composition and uranium leaching
    Mineral content changes with time
    Uranium concentration varies with time
    • Table 1. Chemical reaction in the process of leaching

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      Table 1. Chemical reaction in the process of leaching

      铀矿物组分

      Uranium mineral composition

      参与反应的主要物质

      The main substances involved in the reaction

      化学反应

      Chemical reaction

      石英QuartzSiO2

      ⑴ CaCO3+2H++SO42-→CaSO4↓+CO2↑+H2O

      ⑵ MgCO3+2H+→Mg2++CO2↑+H2O

      ⑶ Mg2++H2O+SiO2→MgSiO3↓+2H+

      ⑷ Fe2O3+6H+→2Fe3++6H2O

      ⑸ FeO+2H+→2Fe2++H2O

      ⑹ Fe3++3OH-→Fe(OH)3

      ⑺ Fe2++2OH-→Fe(OH)2

      ⑻ Al2O3+6H+→2Al3++6H2O

      ⑼ UO2+2Fe3+→UO22++2Fe2+

      ⑽ CaO+2H++SO42-→CaSO4↓+H2O

      ⑾ Al3++3OH-→Al(OH)3

      ⑿ MgO+2H+→Mg2++H2O

      白云石DolomiteCaCO3、MgCO3、Fe2O3、FeO
      方解石CalciteCaCO3
      黏土矿物Clay mineralAl2O3、MgO、UO2
      矿物杂质Mineral impuritiesCaO、Fe2O3、FeO、Al2O3、MgO、UO2
    • Table 2. Mineral composition and content (%)

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      Table 2. Mineral composition and content (%)

      时间

      Time / d

      石英

      Quartz

      方解石

      Calcite

      白云石

      Dolomite

      黏土矿物

      Clay mineral

      矿物杂质

      Mineral impurities

      硫酸钙

      Calcium sulfate

      硅酸镁

      Magnesium silicate

      062.59.517.98.02.10.00.0
      156.41.32.214.41.514.210.0
      348.60.01.120.42.017.210.7
      550.90.00.019.01.418.410.3
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    Sheng ZENG, Hao LI, Chunguang LI, Jiayin SONG. Effect of mineral composition change on pore blockage in the process of acid in-situ leaching of uranium[J]. NUCLEAR TECHNIQUES, 2022, 45(12): 120301

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    Paper Information

    Category: Research Articles

    Received: Aug. 2, 2022

    Accepted: --

    Published Online: Jan. 3, 2023

    The Author Email: Sheng ZENG (usczengs@126.com)

    DOI:10.11889/j.0253-3219.2022.hjs.45.120301

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