GEOTECHNOLOGY
Original Paper
UDC 622.234.42 © A.K. Omirgali, Kh.A. Yussupov, S.B. Aliev, E.Kh. Aben, D.K. Akhmetkhanov, 2022
ISSN 0041-5790 (Print) • ISSN 2412-8333 (Online) • Ugol’ – Russian Coal Journal, 2022, № 4, pp. 72-76
DOI: http://dx.doi.org/10.18796/0041-5790-2022-4-72-76
Title
IMPROVING THE EFFICIENCY OF DENITRATION OF SORBENT SOLUTION IN URANIUM GEOTECHNOLOGY
Authors
Omirgali A.K.1, Yussupov Kh.A.1, Aliev S.B.2, Aben E.Kh.1, Akhmetkhanov D.K.1
1 K.I. Satbayev KazNRTU, Almaty, 050046, Republic of Kazakhstan
2 Research Institute of Comprehensive Exploitation of Mineral Resources of Russian Academy of Sciences (IPKON RAS), Moscow, 111020, Russian Federation
Authors Information:
Omirgali A.K., Ph.D student, е-mail: armanbek@inbox.ru
Yussupov Kh. A., Doctor of Engineering Sciences, Professor, е-mail: k.yussupov@satbayev.university
Aliev S.B., Doctor of Engineering Sciences, Professor, Senior Researcher, е-mail: alsamat@yandex.ru
Aben E.Kh., PhD (Engineering), Associate professor, е-mail: y.aben@satbayev.university
Akmetkanov D.K., PhD (Engineering), Associate professor, е-mail: d.akhmetkanov@satbayev.university
Abstract
The use of the method of in-situ leaching in the development of uranium deposits in comparison with mining methods traditionally used earlier significantly reduces the damage caused to the environment. With in-situ leaching, the productive solution pumped out of the well undergoes the stages of sorption and desorption, while nitrates are used for desorption. To reuse sorbents after desorption, it is necessary to remove nitrates with a solution with an increased concentration of acid. The analysis of the denitration results, even with an increased concentration of sulfuric acid, showed a low degree of denitration. This leads to deterioration of the sorption properties of the resin for uranium, loss of nitrate ions and, as a consequence, increased consumption of ammonium nitrate and sulfuric acid. Therefore, the technology of activation of the washing solution was proposed. The article presents the results of laboratory studies on denitration (washing) of a synthetic ion-exchange sorbent using an activated solution on a model installation. To compare the results obtained, industrial tests were carried out, for which a pilot plant for activating the solution was manufactured. If in laboratory conditions the increase in the degree of denitration was 17-33,7%, then in pilot tests - 7%.
Keywords
In-situ leaching, Synthetic ion exchange sorbent, Denitration, Nitrate ions, Activation, Ion exchange resin, Sorption, Desorption.
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For citation
Omirgali A.K., Yussupov Kh.A., Aliev S.B., Aben E.Kh. & Akhmetkhanov D.K. Improving the efficiency of denitration of sorbent solution in uranium geotechnology. Ugol’, 2022, (4), pp. 72-76. (In Russ.). DOI: 10.18796/0041-5790-2022-4-72-76.
Paper info
Received December 20, 2021
Reviewed January 15, 2022
Accepted March 22, 2022
