Advertisement

Thermal and Mechanical Activation of Sericite for Recovery of Potash Values

  • Gulshan Kumar
  • Himanshu Tanvar
  • Yogendra Pratap
  • Nikhil DhawanEmail author
Technical Paper

Abstract

Sericite sample having potash (K2O) content ~ 9% was evaluated as a source of potash. The mineralogical studies revealed the fine grain structure of sericite containing muscovite, orthoclase, and phlogopite as the major potash bearing phases. The feed sample directly leached in different lixiviants yielded low potash dissolution values. Planetary ball milling was carried out to liberate the potash values from silicate matrix. It was observed that the K-bearing phases were quite stable, with milling action of about 8 h yielded ~ 30% values. The heat treatment of sericite with NaOH resulted in ~ 90% K-dissolution at optimum conditions (60% flux, 600 °C, 30 min) with the formation of sodium silicate and kalsilite. Mechanical activation had a positive effect on heat treatment kinetics as temperature decreased from 600 to 250 °C with ~ 100% potash recovery. CaCl2 and Na2CO3 were also evaluated as flux and based on a comparison of process variables and yield, NaOH was found to be the best flux.

Keywords

Sericite Recovery of potash Heat treatment Planetary ball milling Mechanical activation Leaching 

Notes

Acknowledgements

The authors would like to acknowledge the funding received from Ministry of Mines (Grant No. MOM-1004-MMED) and Science Engineering Research Board (Grant No. SER-1052-MMED) to carry out the research work.

References

  1. 1.
    Amundson R, Berhe A A, Hopmans J W, Olson C, Sztein A E, and Sparks D L, Soil Sci 348 (2015) 647.Google Scholar
  2. 2.
    Ciceri D, Manning D A C, and Allanore A, Sci Total Environ 502 (2015) 590.Google Scholar
  3. 3.
    IBM, Indian Minerals Yearbook 2017 (Part- III: Mineral Reviews), 56th edn, Potash.Google Scholar
  4. 4.
    Jena S K, Dhawan N, Rao D S, Mishra B K, and Das B, Int J Miner Process 133 (2014) 13.Google Scholar
  5. 5.
    Santos W O, Mattiello E M, Marciano da Costa L, Abrahao W A P, Ferreira de Novais R, and Cantarutti R B, Int J Miner Process 140 (2015) 72.Google Scholar
  6. 6.
    Manning D A C, Nat Resour Res 27 (2017) 217.Google Scholar
  7. 7.
    Mazumder A K, Sharma T, and Rao T C, Int J Miner Process 38 (1993) 111.Google Scholar
  8. 8.
    Varadachari C, Ind Eng Chem Res, 36 (1997) 4768.Google Scholar
  9. 9.
    Jena S K, Dhawan N, Rao D S, and Das B, Sep Sci Technol 51 (2015) 269.Google Scholar
  10. 10.
    Ciceri D, Oliveira M D, and Allanore A, Green Chem, 19 (2017) 5187.Google Scholar
  11. 11.
    Shekhar S, Mishra D, Agarwal A, and Sahu K K, J Clean Prod 147 (2017) 681.Google Scholar
  12. 12.
    Rudmina M, Banerjee S, Mazurov A, Makarov B, and Martemyanovd D, Appl Clay Sci 150 (2017) 225.Google Scholar
  13. 13.
    Rudmina M, Oskinaa Y, Banerjee S, Mazurova A, Soktoeva B, and Shaldybina M, Appl Clay Sci 162 (2018) 121.Google Scholar
  14. 14.
    Shekhar S, Mishra D, Agarwal A, and Sahu K K, App Clay Sci 143 (2017) 50.Google Scholar
  15. 15.
    Eberl D D, Srodon J, Lee M, Nadeau P H, and Northrop H R, Am Miner 72 (1987) 914.Google Scholar
  16. 16.
    Shih Y J, and Shen Y H, Appl Clay Sci 43 (2009) 282.Google Scholar
  17. 17.
    Silvester E J, Heyes G W, Bruckard W J, and Woodcock J T, Miner Process Extr Metall 120 (2013) 10.Google Scholar
  18. 18.
    Wang H, Feng Q, Tang X, Zuo K, and Liu K, Minerals 7 (2017) 1.Google Scholar
  19. 19.
    Sreenivas B, Roy A B, Srinivasan R, Proc Indian Acad Sci (Earth Planet Sci), 110 (2001) 39.Google Scholar
  20. 20.
    IBM, Indian Minerals Yearbook 2016 (Part- I: General Reviews), 55th edn, State Reviews Madhya Pradesh.Google Scholar
  21. 21.
    Prasad C S, Mukhopadhyay T K, and Maiti K M, Trans Ceram Soc 48 (1989) 96.Google Scholar
  22. 22.
    Balaz P, Mechanochemistry in Nanoscience and Minerals Engineering, Springer, Berlin (2008), ISBN 3-540-74854-0.Google Scholar
  23. 23.
    Kleiv R A, and Thornhill M, Miner Eng 20 (2007) 334.Google Scholar
  24. 24.
    Williams, P J, and Cloete, T E, S Afr J Sci 106 (2010) 1.Google Scholar

Copyright information

© The Indian Institute of Metals - IIM 2018

Authors and Affiliations

  • Gulshan Kumar
    • 1
  • Himanshu Tanvar
    • 1
  • Yogendra Pratap
    • 1
  • Nikhil Dhawan
    • 1
    Email author
  1. 1.Department of Metallurgical and Materials EngineeringIndian Institute of TechnologyRoorkeeIndia

Personalised recommendations