IMPROVING THE EFFICIENCY OF DENITRATION OF SORBENT SOLUTION IN URANIUM GEOTECHNOLOGY

Повышение эффективности денитрации сорбента при геотехнологии урана
Omirgali A.K. Aliev S.B. Yussupov Kh.A. Aben E.Kh. Akhmetkhanov D.K.
2022 Ugol Journal Edition, LLC

Ugol
2022 Issue 4 72 - 76 pp.

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%.

Activation , Denitration , Desorption , In-situ leaching , Ion exchange resin , Nitrate ions , Sorption , Synthetic ion exchange sorbent

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K.I. Satbayev KazNRTU, Almaty, 050046, Kazakhstan
Research Institute of Comprehensive Exploitation of Mineral Resources of Russian Academy of Sciences (IPKON RAS), Moscow, 111020, Russian Federation

K.I. Satbayev KazNRTU
Research Institute of Comprehensive Exploitation of Mineral Resources of Russian Academy of Sciences (IPKON RAS)

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