Vol. 6 pp. 435–450

T.E. Litvinova, D.V. Suchkov, S.A. Gerasjov

CHEMICALLY DEPOSITIONED PHOSPHOCHALK (CaCO3) AS A USEFUL PRODUCT OF PHOSPHOGYPSUM WASTE UTILIZATION

 

Annotation. The prospects of utilization of phosphogypsum (CaSO4*nH2O, a multi-tonnage waste of phosphate raw materials processing) are considered during the research. The conversion of phosphogypsum in carbonate solutions will effectively realize the resource potential of waste by obtaining CaCO3 (phosphochalk) as a marketable product. It was found that a number of parameters of phosphogypsum conversion should be controlled to obtain CaCO3 with increased particle size: temperature, duration, solution concentration, ratio of liquid and solid phases. The boundary conditions of conversion necessary for further selection of the most optimal conditions for complex processing of phosphogypsum are substantiated.

Keywords: gypsum-containing waste, finely dispersed calcium carbonate, carbonization, crystallization, rare earth elements, technogenic raw materials, waste utilization.

 

For citation: Litvinova T.E., Suchkov D.V., Gerasjov S.A. [Chemically depositioned phosphochalk (CaCO3) as a useful product of phosphogypsum waste utilizayion] Upravlenie tekhnosferoi, 2023, vol. 6, issue 3. (In Russ.) Available at: https://technosphere-ing.ru/ рр. 435–450.

DOI: 10.34828/UdSU.2023.70.83.010

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About the Authors

Litvinova Tatiana Evgenievna

Doctor of Technical Sciences, Associate Professor, Professor of the Department of General and Physical Chemistry, St. Petersburg Mining University, 199106, Vasilievsky Island, 21 line, 2, St. Petersburg, Russia.

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Suchkov Denis Vjacheslavovich

Graduate student of the Department of Geoecology, St. Petersburg Mining University, 199106, Vasilievsky Island, 21 line, 2, St. Petersburg, Russia.

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Gerasjov Stepan Alekseevich

Master’s degree student of the Department of Chemical Technologies and Energy Recycling, St. Petersburg Mining University, 199106, Vasilievsky Island, 21 line, 2, St. Petersburg, Russia.

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