有色金属科学与工程Issue(2)：95-99,5.DOI:10.13264/j.cnki.ysjskx.2014.02.017
离子型稀土浸矿过程中渗透性变化规律的试验研究
Permeability change rule of ion-adsorption rare-earth in ore leaching process
摘要
Abstract
The permeability of ionic rare earth ore has a significant impact on leaching process and slope stability changes caused by leaching. Therefore , the indoor column leaching tests are used to study variation of rare earth ion permeability in percolation process. By comparing the permeability variation of ore and screening sample, the mechanism of permeability variation in leaching is explored . The results show that in water percolation process, micro-particles migration increases the seepage stability time and the range of seepage. With the increase of hydraulic gradient , the seepage field stable time decreases and flow range ability increases. In the process of leaching , the ion adsorption and the ion exchange reduces the permeability coefficient, micro-particles migrate increases the permeability coefficient , and two opposite effects coexist. When the hydraulic gradient is less than a critical value , Ion adsorption and ion exchange is the main reason changes permeability coefficient. When the hydraulic gradient is more than a critical value ,micro-particles migration is the main reason changes permeability coefficient. The impact of micro-particles migration on permeability coefficient increases with increasing of hydraulic gradient. As ore ’s particle size distribution is dispersed and graded better, the seepage filed of ore has longer stable time than screening sample.关键词
离子型稀土矿/柱浸试验/微颗粒迁移/渗透性变化Key words
ion-absorbed rare-earth ore/leaching process/micro-particles migration/permeability coefficient分类
建筑与水利引用本文复制引用
罗嗣海,黄群群,王观石,胡世丽,洪本根..离子型稀土浸矿过程中渗透性变化规律的试验研究[J].有色金属科学与工程,2014,(2):95-99,5.基金项目
国家自然科学基金资助项目（51264008）；国家高技术研究发展计划（863计划）资助项目（2012AA061901）；江西省教育厅科技落地计划项目（03904）；江西省交通厅科技计划项目 （）
