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有色金属(矿山部分):2024,76(2):14-25
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巴彦乌拉铀矿地浸过程中溶浸液化学成分演化特征
丰章哲1,刘金辉1,阳奕汉2,邢拥国3,胡鹏飞2,王如意2,梁大业2,何 挺1
((1.东华理工大学,南昌 330013;2.中核内蒙古矿业有限公司,呼和浩特 010010;3.中核矿业科技有限公司,北京 101149))
Characterization of the chemical composition of the leach solution during the ground leaching process at Bayan-Ula uranium mine
FENG Zhangzhe1, LIU Jinhui1, YANG Yihan2, XING Yongguo3, HU Pengfei2, WANG Ruyi2, LIANG Daye2, HE Ting1
((1.East China University of Technology, Nanchang 330013, China; 2. Inner Mongolia Mining Co., Ltd., CNNC, Huhhot 010010, China; 3. China Nuclear Mining Technology Co., Ltd., Beijing 101149, China))
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投稿时间:2023-09-07    修订日期:2023-09-27
中文摘要: 地浸采铀是砂岩型铀矿的主要开采方法,酸性溶浸液与矿石反应后不仅铀被溶解,而且大量杂质离子也随之转入溶浸液中。本文以巴彦乌拉铀矿C12采区北部某抽注单元为研究对象,通过对其抽液孔浸出液化学成分监测,对溶浸液化学成分演化特征进行了系统研究。研究结果表明,溶浸液离子浓度增高是高酸溶浸液与含矿层矿物相互作用的结果,离子浓度演化经历上升、快速上升及相对稳定3个阶段,且酸度越高,浓度增高速率越快,矿物与硫酸反应的顺序大致为碳酸盐、黄铁矿(铁氧化物)、硅铝酸盐、钠长石、钾长石;相关阳离子浓度增长速率与SO42-浓度增长速率演化特征具有同步性,SO42-浓度超过12g/L时Ca2+浓度出现降低,表明CaSO4发生了沉淀。这些研究成果对于指示矿物溶解迁移的演化规律具有重要的理论意义与较高学术价值。
Abstract:Uranium extraction by ground leaching is the main mining method for sandstone-type uranium mines, and not only is uranium dissolved after the acidic leach solution reacts with the ore, but a large number of impurity ions are also transferred into the leach solution. This paper takes a pumping unit in the northern part of C12 mining area of Bayan Wula uranium mine as the research object, and carries out a systematic research on the evolution characteristics of the chemical composition of leach solution by monitoring the chemical composition of leach solution from its pumping holes. The results show that the increase in ion concentration of leach solution is the result of the interaction between the high acid leach solution and the minerals in the ore-bearing layer, and the evolution of ion concentration goes through three stages, namely, rising, rapidly rising and relatively stable, and the higher the acidity, the faster the rate of increase in concentration, and the order of the reaction between minerals and sulphuric acid is roughly as follows: carbonate, pyrite (iron oxides), silica-alumina, sodium feldspar, and potassium feldspar; the growth rate of the concentration of the cations concerned is similar to the growth rate of SO42- concentration. SO42- concentration growth rate evolution characteristics have synchronization, SO42- concentration more than 12g / L Ca2+ concentration appeared to decrease, indicating that the precipitation of CaSO4 occurred. These research results have important theoretical significance and high academic value for indicating the evolution of mineral dissolution and migration.
文章编号:     中图分类号:TL212??    文献标志码:
基金项目:国家自然科学基金核技术创新联合基金(U1967209)
引用文本:
丰章哲,刘金辉,阳奕汉,邢拥国,胡鹏飞,王如意,梁大业,何 挺.巴彦乌拉铀矿地浸过程中溶浸液化学成分演化特征[J].有色金属(矿山部分),2024,76(2):14-25.
FENG Zhangzhe,LIU Jinhui,YANG Yihan,XING Yongguo,HU Pengfei,WANG Ruyi,LIANG Daye,HE Ting.Characterization of the chemical composition of the leach solution during the ground leaching process at Bayan-Ula uranium mine[J].NONFERROUS METALS(Mining Section),2024,76(2):14-25.

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