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The mechanism of secondary countercurrent leaching of uranium-containing alkali slag

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Abstract

According to the difficult problem of disposal and recovery of uranium-containing waste slag, the leaching experiment was conducted by using the secondary countercurrent leaching process. The results showed that under conditions particle size of 1 mm, reaction time of 120 min, leaching temperature of 90 °C, nitric acid concentration of 429 g/L, liquid–solid ratio of 2.2:1, hydrogen peroxide dosage of 30 mL/L in primary leaching, then the temperature was switched to 130 °C during the secondary leaching. The leaching rate of uranium in alkali slag was 99.73% and the content of the uranium in insoluble slag was 0.788%.

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Authors and Affiliations

  1. School of Resources Environment and Safety Engineering, University of South China, Hengyang, China

    Haotong Guo, Qingliang Wang, Zhiwu Lei, Fang Hu & Eming Hu

  2. Key Discipline Laboratory of National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, China

    Qingliang Wang, Zhiwu Lei, Fang Hu & Eming Hu

  3. Jianzhong Nuclear Fuel co., Ltd, China National Nuclear Corporation, Yibin, China

    Qiang Wan & Fangping Zhu

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  1. Haotong Guo
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Correspondence to Eming Hu.

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Guo, H., Wang, Q., Lei, Z. et al. The mechanism of secondary countercurrent leaching of uranium-containing alkali slag. J Radioanal Nucl Chem 332, 3827–3836 (2023). https://doi.org/10.1007/s10967-023-09049-2

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