华东理工大学化工学院，联合化学反应工程研究所，国家盐湖综合利用工程技术研究中心，上海 200237
收稿日期:2018-01-09修回日期:2018-01-30出版日期:2018-10-22发布日期:2018-10-12通讯作者:李平基金资助:国家自然科学基金资助项目;国家自然科学基金资助项目Separation and recovery of potassium, aluminum and silicon after decomposition of potassium feldspar using sub-molten salt method
Anrui DONG, Mengjie LUO, Wei JIANG, Chenglin LIU, Ping LI*, Jianguo YUState Key Laboratory of Chemical Engineering, School of Chemical Engineering, National Engineering Research Center for Integrated Utilization of Salt Lake Resources, East China University of Science and Technology, Shanghai 200237, China
Received:2018-01-09Revised:2018-01-30Online:2018-10-22Published:2018-10-12Contact:Ping LI Supported by:National Natural Science Foundation of China;National Natural Science Foundation of China摘要/Abstract
摘要： 采用KOH亚熔盐法常压低温分解河北钾长石矿粉，回收过量碱后，用硫酸溶解固渣，得含高浓度钾、铝、硅的母液；采用溶胶?凝胶法和分步醇析法从母液中制备硅凝胶、钾明矾和硫酸钾，钾明矾热解制备氧化铝. 结果表明，钾长石矿中各组分含量分别为K2O 13.13wt%，Al2O3 16.66wt%，SiO2 58.28wt%. 在H+浓度3.80 mol/L及95℃条件下母液易形成硅凝胶，脱硅率达98%以上，SiO2含量大于99.0%，比表面积大于700 m2/g，孔容约为1.0 cm3/g，孔径为5?6 nm；对脱硅母液分步醇析，在25℃、醇料体积比为1时，优先析出钾明矾，铝析出率达98%，降温至5℃并增大醇料体积比至2，可从母液中结晶析出硫酸钾，钾回收率达89%.
引用本文
董安瑞 罗孟杰 姜炜 刘程琳 李平 于建国. 亚熔盐分解钾长石矿样中钾铝硅的分离[J]. 过程工程学报, 2018, 18(5): 972-980.
Anrui DONG Mengjie LUO Wei JIANG Chenglin LIU Ping LI Jianguo YU. Separation and recovery of potassium, aluminum and silicon after decomposition of potassium feldspar using sub-molten salt method[J]. Chin. J. Process Eng., 2018, 18(5): 972-980.
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