COAL PREPARATION


Original Paper

UDC 62-665.4; 661.86 D.I. Smirnov, A.V. Kalashnikov, A.A. Zakharov, M.E. Zvonareva, T.G. Cherkasova, D.A. Barantsev 2023

ISSN 0041-5790 (Print) ISSN 2412-8333 (Online) Ugol  Russian Coal Journal, 2023, S12, pp. 84-89

DOI: http://dx.doi.org/10.18796/0041-5790-2023-S12-84-89

Title

EXTRACTION OF RARE EARTH ELEMENTS AND SCANDIUM FROM COAL MINING WASTE USING GRANULAR SULPHATISATION METHOD

Authors

Smirnov D.I.1 , Kalashnikov A.V.1 , Zakharov A.A. 2 , Zvonareva M.E.1 , Cherkasova T.G. 3 , Barantsev D.A. 3

1 JSC VNIIHT, Moscow, 111524, Russian Federation

2 JSC Giredmet, Moscow, 111524, Russian Federation

3 T.F. Gorbachev Kuzbass State Technical University, Kemerovo, 650000, Russian Federation

Authors Information

Smirnov D.I., PhD (Engineering), leading researcher of the Laboratory of processing of Technogenic raw Materials, e-mail: dmigsmirnov@rosatom.ru

Kalashnikov A.V., PhD (Engineering), Senior Researcher at the Laboratory of processing of Technogenic raw Materials Zakharov A.A., Researcher at the Laboratory of Processing of Technogenic Raw Materials.

Zvonareva M.E., Leading engineer of the laboratory of processing of technogenic raw materials

Cherkasova T.G., Doctor of Chemical Sciences, Professor, Director of theInstituteof Chemical and Oil and Gas Technologies, e-mail: ctg.htnv@kuzstu.ru

Barantsev D.A., Assistant the Institute of Chemical and Oil and Gas Technologies, e-mail: kemche@yandex.ru

Abstract

In the process of coal refining, dumps of ash and slag and waste from the enrichment of coal materials are formed, which occupy large areas and require significant operating costs. Dumps are a source of man-made environmental pollution, which negatively affects the health of the population and poses a threat to the flora and fauna of nearby areas. On the other hand, coal processing wastes are similar in chemical and mineralogical composition to natural mineral raw materials, which makes their use in industry, the construction industry and agriculture one of the relevant directions in the strategic way of solving the environmental problem in the area of operation of coal industry enterprises. This article presents the results of studies of the process of granular sulfatization of coal mining waste in order to obtain material for further effec? tive extraction of scandium and rare earth elements from it using agitation or percolation leaching methods. It has been established that carrying out the process of granule sulfatization with 95% sulfuric acid makes it possible, with subsequent aqueous leaching of the granule material, to obtain the greatest extraction of scandium and rare earth elements. The consumption of sulfuric acid in this case is 332 kg/t. The influence of the firing temperature of the granu? lar material on the extraction of scandium and rare earth elements during the subsequent water leaching of the fired granular material has been established.

Keywords

Rare metals, Man-made dumps, Ashes and slag waste, Coal mining waste, Granulation, Sulfuric acid, Acid capacity, Scandium, Rare earth elements.

References

1. Samodelov A.P. The state and complexation of scandium in solutions of mineral acids. Radiokhimiya, 1964, Vol. 6, (5), pp. 110-112. (In Russ.).

2. Zelikman A.N. & Meerson G.A. Metallurgy of rare metals. Moscow, Metal? lurgiya Publ., 1973, 608 p. (In Russ.). 3. Zelikman A.N., Woldman G.M. & Belyavskaya L.V. Theory of hydrometallurgical processes. Moscow, Metallurgiya Publ., 1975, 504 p. (In Russ.).

4. Voloshchuk S.N. Heap and underground leaching of metals. Moscow, Nedra Publ., 1982, 113 p. (In Russ.).

5. Ravich B.M. Briquetting of ores. Moscow, Nedra Publ., 1982, 183 p. (In Russ.).

6. Korshunov B.G., Reznik A.M. & Semenov S.A. Scandium. Moscow, Metallurgiya Publ., 1987, 184 c. (In Russ.).

7. Zelikman A.N. & Korshunov B.G. Metallurgy of rare metals. Moscow, Metallurgiya Publ., 1991, 432 p. (In Russ.).

8. Korovin S.S., Bukin V.I., Fedorov P.I. & Reznik A.M. Rare and scattered elements. Chemistry and technology. Moscow, MISiS Publ., 2003, Vol. 3, 438 p. (In Russ.).

9. Abdurakhmonov O.E., Semenov S.A. & Sokolova Yu.V. Extraction of scandium from sulfuric acid solutions of leaching of red slurries of aluminum production. Tsvetnye metally, 2022, (4), pp. 33-39. (In Russ.).

10. Smirnov I.P., Matveev A.A. & Smirnov K.M. Leaching of uranium and complex ores. Tsvetnye metally, 2003, (4), pp. 27-34. (In Russ.).

11. Fazlullina M.I. Underground and heap leaching of uranium, gold and other metals. T.I. Uran. Moscow, Ruda i metally Publ., 2005, 328 p. (In Russ.).

12. Kuznetsov I.V. Development of the process of preparation of clay complex uranium ores for heap leaching. Dissertation for the degree of Candidate of Technical Sciences 05.17.02. Moscow, 2014, 175 p. (In Russ.).

13. Patent for the invention RU 2657149 C1, 08.06.2018. Method of extraction of rare earth metals and scandium from ash and slag waste. Koltsov V.Yu., Novikov P.Yu., Vlasova T.V., Zakharov A.A., Kalashnikov A.V., Yudina T.B., Zvonareva M.E., Velichkina N.S. Application No. 2017126637 dated 25.07.2017. (In Russ.).

14. Patent for the invention RU 2665512 C1, 30.08.2018. Method of processing phosphogypsum. Koltsov V.Yu., Novikov P.Yu., Vlasova T.V., Zakharov A.A., Velichkina N.S., Kalashnikov A.V., Yudina T.B. Application No 2017115339 dated 02.05.2017. (In Russ.).

15. Patent for the invention RU 2714309 C1, 02/14/2020. Method of purification of oil-contaminated soils from natural radionuclides. Koltsov V.Yu., Yudina T.B., Novikov P.Yu., Velichkina N.S., Vlasova T.V. Application No 2019121721 dated 11.07.2019. (In Russ.).

Acknowledgements

The research was financially supported by a grant from the Russian Ministry of Education and Science (Agreement No 075-15-2022-1193).

For citation

Smirnov D.I. Kalashnikov A.V., Zakharov A.A., Zvonareva M.E., Cherkasova T.G. & Barantsev D.A. Extraction of rare earth elements and scandium from coal mining waste using granular sulphatisation method. Ugol, 2023, (S12), pp. 84-89. (In Russ.). DOI: 10.18796/0041-5790-2023-S12-84-89.

Paper info

Received November 1, 2023

Reviewed November 15, 2023

Accepted November 30, 2023