The influence of surfactants on the acid leaching process of a uranium mine in Inner Mongolia

IF 1.5 3区化学 Q3 CHEMISTRY, ANALYTICAL Journal of Radioanalytical and Nuclear Chemistry Pub Date : 2024-08-20 DOI:10.1007/s10967-024-09697-y

Junhan Li, Jiahui Feng, Jingfang Xue, Yonghuan Huang, Zimin Zhang, Haonan Li, Yuxin Chen, Jiacheng Guo, Xuebin Su, Rong Hua

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Abstract

The permeability of ore is a key factor affecting the leaching effect of uranium ore, and the addition of surfactants can significantly improve the permeability of ore, thereby strengthening uranium ore leaching. This article simulates two infiltration leaching processes, atmospheric heap leaching and pressurized in-situ leaching, and explores the effect of surfactant cetyltrimethylammonium bromide on uranium leaching rate and ore permeability coefficient in both processes. The results showed that in the atmospheric heap leaching test, adding surfactants increased the ore leaching rate by 30.31% during the same 13 day test cycle, and the leaching process was mainly controlled by surface chemical reactions. In the pressurized in-situ leaching test, based on the results of a leaching cycle of 13 days, the average permeability coefficient increased by 72.89% and 64.07% after adding surfactants to the drained and water containing uranium deposits, respectively. In addition, the peak uranium concentration in the leaching solution appeared 2 days earlier, indicating that the addition of surfactants has a significant promoting effect on in-situ leaching of uranium, improving the leaching efficiency of uranium, and can improve the leaching rate of uranium within the same leaching cycle.

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表面活性剂对内蒙古铀矿酸浸过程的影响

矿石的渗透性是影响铀矿石浸出效果的关键因素，添加表面活性剂可以显著改善矿石的渗透性，从而加强铀矿石的浸出。本文模拟了常压堆浸和加压原地浸出两种浸润浸出工艺，探讨了表面活性剂十六烷基三甲基溴化铵对两种工艺中铀浸出率和矿石渗透系数的影响。结果表明，在常压堆浸试验中，在相同的 13 天试验周期内，添加表面活性剂可使矿石浸出率提高 30.31%，浸出过程主要受表面化学反应控制。在加压原地浸出试验中，根据 13 天浸出周期的结果，在含铀矿床的排水和水中添加表面活性剂后，平均渗透系数分别增加了 72.89% 和 64.07%。此外，浸出液中铀浓度峰值出现的时间提前了 2 天，说明表面活性剂的添加对铀的原地浸出有明显的促进作用，提高了铀的浸出效率，并能在同一浸出周期内提高铀的浸出率。

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来源期刊

Journal of Radioanalytical and Nuclear Chemistry 化学-分析化学

CiteScore

2.80

自引率

18.80%

发文量

504

审稿时长

2.2 months

期刊介绍： An international periodical publishing original papers, letters, review papers and short communications on nuclear chemistry. The subjects covered include: Nuclear chemistry, Radiochemistry, Radiation chemistry, Radiobiological chemistry, Environmental radiochemistry, Production and control of radioisotopes and labelled compounds, Nuclear power plant chemistry, Nuclear fuel chemistry, Radioanalytical chemistry, Radiation detection and measurement, Nuclear instrumentation and automation, etc.