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

doi:10.1016/j.cjche.2017.09.006

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (4): 845-851.DOI: 10.1016/j.cjche.2017.09.006

• Energy, Resources and Environmental Technology • 上一篇下一篇

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

Zhao Wang^1,2,3, Quanyou Zhang^1,2, Ying Yao^1,2, Yongzhong Jia^1,2, Bingjun Xie⁴

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

收稿日期:2017-06-11 修回日期:2017-09-01 出版日期:2018-04-28 发布日期:2018-05-19
通讯作者: Quanyou Zhang,E-mail address:qyzh@isl.ac.cn
基金资助:
Supported by the National Natural Science Foundation of China (21373252), Fundamental Research Project of QingHai Science & Technology Department (2016-ZJ-749) and Qinghai Innovation Fund for Technology Based Firms (2014-GX-Q19).

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

Zhao Wang^1,2,3, Quanyou Zhang^1,2, Ying Yao^1,2, Yongzhong Jia^1,2, Bingjun Xie⁴

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

Received:2017-06-11 Revised:2017-09-01 Online:2018-04-28 Published:2018-05-19
Contact: Quanyou Zhang,E-mail address:qyzh@isl.ac.cn
Supported by:
Supported by the National Natural Science Foundation of China (21373252), Fundamental Research Project of QingHai Science & Technology Department (2016-ZJ-749) and Qinghai Innovation Fund for Technology Based Firms (2014-GX-Q19).

摘要/Abstract

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 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

Abstract: 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.

Key words: Low temperature molten salt, K-feldspar, Mechanism, Extraction ratio

Zhao Wang, Quanyou Zhang, Ying Yao, Yongzhong Jia, Bingjun Xie. The extraction of potassium from K-feldspar ore by low temperature molten salt method[J]. Chinese Journal of Chemical Engineering, 2018, 26(4): 845-851.

Zhao Wang, Quanyou Zhang, Ying Yao, Yongzhong Jia, Bingjun Xie. The extraction of potassium from K-feldspar ore by low temperature molten salt method[J]. Chin.J.Chem.Eng., 2018, 26(4): 845-851.

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