Processing of Mica for Extraction of Alumina and Potash Values

  • Ashwini Kumar
  • Himanshu Tanvar
  • Nikhil DhawanEmail author
Technical Paper


Mica sample containing 34% alumina and 9% potash has been investigated as a potential dual source of alumina and potash. It was found that planetary milling had a strong effect on structure breakdown as well as on the release of alumina and potash values. Both alumina and potash were extracted from mica using mechanical milling followed by hydrochloric acid leaching and precipitation process. The optimal conditions derived from statistical design yielded 72% alumina and 75% potash values in the form of γ-alumina and sylvinite. The analysis of the final precipitate was carried out by different characterization techniques such as XRD, SEM–EDS, XRF, BET surface area analysis.


Mica Alumina Potash Milling Leaching Precipitation 



The authors acknowledge the financial grant received from the Ministry of Mines and Science Engineering Research Board to carry out the research work.


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Copyright information

© The Indian Institute of Metals - IIM 2019

Authors and Affiliations

  1. 1.Department of Metallurgical and Materials EngineeringIndian Institute of Technology, RoorkeeRoorkeeIndia

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