The extraction of potassium from K-feldspar ore by low temperature molten salt method  

作　　者：Zhao Wang Quanyou Zhang Ying Yao Yongzhong Jia Bingjun Xie 

机构地区：[1]Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China [2]Qinghai Engineering and Technology Research Center of Comprehensive Utilization of Salt Lake Resources, Xining 810008, China [3]University of Chinese Academy of Sciences, Beijing 100049, China [4]Mangya Xingyuan Potash Corporation Ltd., Haixi 817500, China

出　　处：《Chinese Journal of Chemical Engineering》2018年第4期845-851,共7页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(21373252);Fundamental Research Project of Qing Hai Science&Technology Department(2016-ZJ-749);Qinghai Innovation Fund for Technology Based Firms(2014-GX-Q19)

摘　　要：The low temperature molten salt method was used to extract potassium from K-feldspar ore, and some related factors including mass ratio between NaNO_3, NaOH, H_2O and K-feldspar ore, particle size of K-feldspar ore,reaction temperature and time were investigated, respectively. In addition, the optimum condition for this method was determined by a series of condition experiments. What was more, the K-feldspar ore and the leach residue after reaction based on the above optimum condition were analyzed by XRD, SEM and EDS,separately. The results of which indicated that the mechanism of extraction of potassium for this method was according to the ion exchange reaction between sodium ion and potassium ion, and the extraction ratio of potassium had an obvious improvement than that of traditional methods, which could reach up to 96.25%.Therefore, this method can be a feasible solution to extract potassium from K-feldspar ore for its low energy consumption and high efficiency.The low temperature molten salt method was used to extract potassium from K-feldspar ore, and some related factors including mass ratio between NaNO3, NaOH, H2O and K-feldspar ore, particle size of K-feldspar ore,reaction temperature and time were investigated, respectively. In addition, the optimum condition for this method was determined by a series of condition experiments. What was more, the K-feldspar ore and the leach residue after reaction based on the above optimum condition were analyzed by XRD, SEM and EDS,separately. The results of which indicated that the mechanism of extraction of potassium for this method was according to the ion exchange reaction between sodium ion and potassium ion, and the extraction ratio of potassium had an obvious improvement than that of traditional methods, which could reach up to 96.25%.Therefore, this method can be a feasible solution to extract potassium from K-feldspar ore for its low energy consumption and high efficiency.

关 键 词：Low temperature molten salt K-feldspar Mechanism Extraction ratio 

分 类 号：TQ131.13[化学工程—无机化工]