离子型稀土原地浸矿工艺中浸矿液入渗直接影响稀土资源的高效开采与利用.基于自制试验装置进行离子型稀土一维水平入渗试验,溶浸液选取3%硫酸铵溶液,研究了4种不同粒径稀土的累积入渗长度、湿润锋运移速率、入渗率等变化规律.结果表明:随着入渗时间的递增,累计入渗长度呈先快速增加、后缓慢发展的趋势;湿润锋运移速率和入渗率先达到最大值、后快速减小再趋于稳定,湿润锋运移速率与时间之间的关系符合幂函数关系v=λ·t-0.5;土样饱和渗透系数为0.0013~0.0025 cm/min,其数值随着最大粒径增大而递增,研究结果有利于实现原地浸矿的科学化.%Infiltration rules of leaching solution in the process of ion-adsorption rare earth in-situ leaching play an important role in high efficiency mining and utilization of rare earth resources. One-dimensional horizontal infiltration experiment of ion-adsorption rare earth was carried out based on the self-made test device with 3%ammonium sulfate solution as the infiltration solution. In this experiment, the rules of cumulative infiltration length, wetting front velocity and infiltration rate of 4 different partical sizes rare earth were studied. The results show that the cumulative infiltration length indicates a trend of"rapidly increasing, then slowly developing";the wetting front velocity and infiltration rate show the trend of "reaching maximum and sharply decreasing, then tend to be developing stably"; the relationship between wetting front velocity and infiltration time is a power function v=λ·t-0.5;the saturated permeability coefficient of soil increases with the increase of the maximum particle size, and the value of which is 0.0013~0.0025 cm/min. The results contribute to the scientific realization of ion-adsorption rare earth in-situ leaching.
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