2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 5: Starkey Intl. Symp. / Mineral Processing
| Editors: | Kongoli F, Kumar P, Senchenko A, Klein B, Silva A.C., Sun C, Mingan W |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 270 pages |
| ISBN: | 978-1-987820-44-7 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Extraction of potash values from silicate rocks
Nikhil Dhawan1;1IIT-ROORKEE, roorkee, India;
Type of Paper: Regular
Id Paper: 248
Topic: 5
Abstract:
The importance of potash for the plants and human growth is well established. Unfortunately, there are no potash resources like sylvite, carnallite or polyhalite in agricultural based country such as India. Therefore, India is meeting complete potash demand through import. An attempt has been made to extract potassium (K) values from silicate rocks such as feldspar and mica. Extensive characterization studies revealed that the sample contains orthoclase and muscovite as major potassium bearing mineral phases and K is locked in the host matrix. These rocks contain ~5-10% K2O and are subjected to different physical and chemical beneficiation processing and recovered only 10-12% values. Finally, a heat treated and activation process has been developed to extract about 90-99% K values at optimum conditions.