COLD DECOMPOSITION OF CARNALLITE ORE
https://doi.org/10.29235/1561-8331-2018-54-2-231-237
Abstract
The carnallite decomposition by water to obtain potassium chloride was studied. Optimal parameters of this process (temperature, time, S:L ratio, ore crushing degree) are determined. It is shown that the optimal ratio of solid to liquid is 2:1.1 for the full carnallite decomposition. The maximum degree of carnallite decomposition and KCl recovery are achieved at a reaction time of 30 minutes. It is shown that for water decomposition of ore with a high content of carnallite (without
insoluble impurities), too fine ore crushing is not required. The main requirement for crushing is the release of the mineral. It is possible to increase KCl content to 95 % and the degree of carnallite decomposition to 99.0–99.5 % by the use of the precipitate washing.
About the Authors
N. P. Krutko
Institute of General and Inorganic Chemistry, National Academy of Sciences of Belarus.
Belarus
Belarus
Nikolay P. Krutko – Academician, D. Sc. (Chemistry), Head of the Department.
9/1, Surganov Str., 220072, Minsk.
V. V. Shevchuk
Institute of General and Inorganic Chemistry, National Academy of Sciences of Belarus.
Belarus
Belarus
Viacheslav V. Shevchuk – Corresponding Member of the National Academy of Sciences of Belarus, D. Sc. (Chemistry), Head of the Department.
9/1, Surganov Str., 220072, Minsk.
A. D. Smychnik
OOO “K-Potash Service С”.
Russian Federation
Russian Federation
Anatoliy D. Smychnik – Corresponding Member of the National Academy of Sciences of Belarus, D. Sc. (Chemistry), Technical Director.
26, Kutuzov Ave., 238434, Kaliningrad.
T. N. Potkina
Institute of General and Inorganic Chemistry, National Academy of Sciences of Belarus.
Belarus
Belarus
Tatyana N. Potkina – Ph. D. (Chemistry), Leading researcher.
9/1, Surganov Str., 220072, Minsk.
References
1. Ilyin V. P., Babets M. A. Prospects for the development of potassium-magnesium salts (carnallite) in Belarus. Gornaya mekhanika i mashinostroenie [Mine mechanical engineering and machine building], 2011, no. 4, pp. 5–15 (in Russian).
2. Kurnakov N. S., Tsifrinovich V. E., Volfkovich S. I. (eds.) Solikamsk carnallites: collection of articles. Moscow; Lenin- grad: ONTI. Main. Publ. of mining and fuel lit., 1935. 416 p. (in Russian).
3. Zhelnin A. A. Theoretical Foundations and Practice of Flotation of Potassium Salts. Leningrad,: Khimiya Publ., 1973. 184 p. (in Russian).
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