基于核磁共振技术的离子型稀土原位浸出细观过程模拟

Fuyu Wu, Dan Wang, Y. Rao, Mei-dao Zhang, Liang Shi, Min Han, Wei Xu
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引用次数: 2

摘要

为了更真实地模拟和计算离子稀土的浸出过程,基于核磁共振成像(NMRI)技术,构建了具有真实尺寸、形状、渗流通道、孔隙比和分布等细观尺度的离子稀土数字模型。采用溶液渗流、离子交换、溶质迁移三个控制方程对原地浸出采矿过程进行了模拟计算。室内柱浸试验结果验证了NMRI模型的可靠性,并分析了注入强度和浸出剂浓度对稀土离子浸出的影响。结果表明:矿体中存在优势渗流通道,优势渗流通道区域首先完成稀土离子交换反应和迁移;通过分析不同注入强度和不同浸出剂浓度工况下稀土离子的浸出结果,结果表明,注入强度和浸出剂浓度对一定范围内稀土离子的浸出有明显的促进作用。在实际工程中,浸出剂的注入强度为0.5~1.0 mL/min,浸出剂浓度为0.20~0.25 mol/L较为经济。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Mesoscopic Process Simulation of In Situ Leaching of Ionic Rare Earth Based on NMRI Technology
In order to simulate and calculate the leaching process of ionic rare earths more realistically, a digital model of ionic rare earths with real size, shape, seepage channel, and pore ratio and distribution at the mesoscopic scale was constructed based on nuclear magnetic resonance imaging (NMRI) technology. And the in situ leaching mining process was simulated and calculated by using three control equations of solution seepage, ion exchange, and solute migration. The reliability of the NMRI model was verified by the results of the indoor column leaching experiment, and the influence of the injection intensity and leaching agent concentration on the leaching of rare earth ions was analyzed. The results show that there are dominant seepage channels in the ore body, and the rare earth ion exchange reaction and migration in the dominant channel area are completed first. By analyzing the leaching results of rare earth ions under the working conditions of different injection strengths and different concentrations of leaching agent, the results show that the injection strength and the concentration of leaching agent have an obvious promoting effect on the leaching of rare earth ions in a certain range. The injection strength of 0.5~1.0 mL/min and the concentration of 0.20~0.25 mol/L leaching agent are considered to be more economical in practical engineering.
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