杂卤石矿室内柱浸条件试验研究

THE POLE-LEACHING EXPERIMENT ON LEACHING TECHNIQUES FOR POLYHALITE

针对我国杂卤石矿的特征, 采用溶浸技术对矿石进行开采, 为了评价矿石的可浸性, 采用柱浸试验以获得进一步研究的工艺技术参数。由试验结果表明: 在一定条件下, 杂卤石矿的浸出性能较好。且在不同的试验条件下, 对浸出液中K+浸出率的影响也有差别, 随着粒度的减小浸出率增大; 随溶浸剂浓度的增大浸出率有所提高, 但当继续增大浓度时, 浸出率的提高不很明显; 渗滤速度对浸出率的影响较复杂, 当渗滤速度增快, K+ 浸出率提高, 但当渗滤速度继续增大浸出率反而会降低; 随着渗滤路径的增长使溶浸液在矿层中有足够的时间扩散, 有利于与矿石中的离子进行接触反应, 从而使浸出率提高。总之, 综合几种衡量浸出效果的主要指标来看, 利用溶浸技术对杂卤石矿开采具有可行性。

The pole-leaching experiment,based on the characteriic of the Polyhalite,gained better economic and technological index.The dynamic leaching experiment was also udied.Under the condtion of different granularity,concentration of leaching agent,infiltration velocity,infiltration route etc.,the experiment results show that Polyhalite ore could be leachability.It was obtained that the leaching rate increase with increasing lixiviants concentration,and increasing infiltration route,and decreasing particle size,the influence on the leaching rate is complicated.From the several moly guide line of measuring the leaching efficacy,the technology of the leachine Polyhalite using CaCl 2 is feasibility.