Research into the effects of technological parameters on regeneration of ceramic disc for vacuum filters
L.G. Gerasimova1, D.V. Maiorov1, E.A. Adamov2
1 Tananaev Institute of Chemistry, Kola Science Centre of the Russian Academy of Sciences, Apatity, Russian Federation
2 Apatit JSC, Kirovsk branch, Kirovsk, Russian Federation
Russian Mining Industry №3/ 2026 p. 211-216
Abstract: Ceramic vacuum filters offer a number of advantages over the designs that use filter cloth as the filtering membrane. Ceramic filters are increasingly used in a variety of technological processes, such as dehydration of mineral suspensions when processing various ores. However, over time, due to clogging of pores in the ceramic material by solid particles of the suspensions, their hydraulic resistance increases, therefore, the filtration performance decreases and regeneration of the ceramic filter cells is required. The goal of this work was to develop modes of nitric acid regeneration of the ceramic filter elements used in the technological cycle for production of apatite concentrate as part of apatite-nepheline ore processing at the Kirovsk branch of Apatit JSC. Research into regeneration of ceramic vacuum filters upon their contamination with mineral particles during filtration of the apatite concentrate pulp helped to formulate the following optimal process conditions: HNO3 concentration should not fall below 1%; regeneration time is up to 2 hours at the temperature of 20°C and at least 1 hour at the temperature of 40°C. The results of the study can be used to intensify the regeneration process of ceramic vacuum filters in the mining and chemical industries.
Keywords: apatite concentrate, dehydration, filtration, ceramic disc filter, regeneration process, nitric acid, decomposition of apatite concentrate
For citation: Gerasimova L.G., Maiorov D.V., Adamov E.A. Research into the effects of technological parameters on regeneration of ceramic disc for vacuum filters. Russian Mining Industry. 2026;(3):211–216. https://doi.org/10.30686/1609-9192-2026-3-211-216
Article info
Received: 27.02.2026
Revised: 24.03.2026
Accepted: 14.04.2026
Information about the authors
Lidiya G. Gerasimova – Dr. Sci. (Eng.), Chief Researcher, Tananaev Institute of Chemistry, Kola Science Centre of the Russian Academy of Sciences, Apatity, Russian Federation; https://orcid.org/0000-0002-7609-4651; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Dmitriy V. Maiorov – Cand. Sci. (Eng.), Leading Researcher, Tananaev Institute of Chemistry, Kola Science Centre of the Russian Academy of Sciences, Apatity, Russian Federation; https://orcid.org/0000-0002-7787-7455; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Evgeniy A. Adamov – Senior Specialist, Apatit JSC, Kirovsk branch, Kirovsk, Russian Federation; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
References
1. Avdokhin V.M. Osnovy obogashcheniya poleznykh iskopaemykh. M.: Moskovskaya tipografiya; 2006. T. 1. 416 s.
2. Salamatov V.I., Golovachev S.N., Gornov Yu.N. Zhiznennyy tsikl filtruyushchikh peregorodok. Izvestiya Sibirskogo otdeleniya RAEN. Geologiya, poiski i razvedka rudnykh mestorozhdeniy. 2016;(2):88–95. Salamatov V.I., Golovachev S.N., Gornov Yu.N. Life cycle of filter membranes. Proceedings of Siberian Department of the Russian Academy of Natural Sciences. Geology, Prospecting and Exploration of Ore Deposits. 2016;(2):88–95. (In Russ.)
3. Salamatov V.I., Zaydes S.A., Beregova G.M. Tekhniko-ekonomicheskie preimushchestva sinteticheskikh tkaney pri obezvozhivanii tekhnicheskikh suspenziy. Vestnik Irkutskogo gosudarstvennogo tekhnicheskogo universiteta. 2010;(7):160–165. Salamatov V.I., Zaydes S.A., Beregova G.M. Technical and economic benefits of synthetic fabrics under the dewatering of technical suspensions. Proceedings of Irkutsk State Technical University. 2010;(7):160–165. (In Russ.)
4. Huttunen M., Nygren L., Kinnarinen T., Ekberg B., Lindh T., Karvonen V. Real-time monitoring of the moisture content of filter cakes in vacuum filters by a novel soft sensor. Separation and Purification Technology. 2019;223:282–291. https://doi.org/10.1016/j.seppur.2019.03.091
5. Krasnyy A.B., Kruglov A.V., Zimbovskiy I.G., Dmitrakova U.V., Yushina T.I., Chylbak-Ool E.D. Effektivnoe obezvozhivanie suspenziy s soderzhaniem tverdoy fazy ot 1 do 30% na dinamicheskikh fil'trakh-sgustitelyakh i promyshlennykh fil'trakh. Khimicheskaya promyshlennost' segodnya. 2021;(3):36–43. Krasny A.B., Kruglov A.V., Zimbovsky I.G., Dmitrakova U.V., Ushina T.I., Chylbak-Ool E.D. Combined intensive dewatering technology for solutions with initial solids concentrations from 1 to 30% using dynamic filter thickeners and industrial filters. Chemical Industry Developments. 2021;(3):36–43. (In Russ.)
6. Serafimova L.I., Naumenko V.G. Osobennosti obezvozhivaniya tonkodispersnykh flotatsionnykh ugol'nykh kontsentratov. Gornyy informatsionno-analiticheskiy byulleten'. 2017;(8):131–141. https://doi.org/10.25018/0236-1493-2017-8-0-131-141 Serafimova L.I., Naumenko V.G. Features of dehydration of finely dispersed coal flotation concentrates. Mining Informational and Analytical Bulletin. 2017;(8):131–141. (In Russ.) https://doi.org/10.25018/0236-1493-2017-8-0-131-141
7. Stovpenko A.S., Narizhnykh V.Yu., Lozovaya S.Yu. Analiz raboty keramicheskikh diskovykh vakuum fil'trov. Mezhdunarodnyy studencheskiy nauchnyy vestnik. 2015;(3-1):81–85. Stovpenko A.S., Narizhnykh V.Yu., Lozovaya S.Yu. Analysis of the operation of ceramic disc vacuum filters. Mezhdunarodnyi Studencheskii Nauchnyi Vestnik. 2015;(3-1):81–85. (In Russ.)
8. Roy S. Recent developments in processing techniques and morphologies of bulk macroporous ceramics for multifunctional applications. Materials Today Communications. 2024;38:107752. https://doi.org/10.1016/j.mtcomm.2023.107752
9. Krasnyy B.L., Bondar' V.V. Sostoyanie i perspektivy primeneniya diskovykh vakuum-fil'trov s keramicheskimi filtruyushchimi elementami v tekhnologii obezvozhivaniya gorno-obogatitel'nykh proizvodstv. Obogashchenie rud. 2007;(2):39–43. Krasny B.L., Bondar V.V. The status and prospects of application of disk vacuum filters with ceramic filtering elements in dewatering technologies at mining-and-processing facilities. Obogashchenie Rud. 2007;(2):39–43. (In Russ.)
10. Dmitrakova U.V., Kruglov A.V., Chylbak-ool E.D., Yushina T.I. Opyt primeneniya razlichnogo fil'troval'nogo oborudovaniya na otechestvennykh predpriyatiyakh. Obogashchenie rud. 2021;(4):52–56. Available at: https://www.rudmet.ru/journal/2039/article/34196/ (accessed: 07.03.2026). Dmitrakova U.V., Kruglov A.V., Yushina T.I., Chylbak-Ool E.D. Filtering equipment application practice at Russian enterprises. Obogashchenie Rud. 2021;(4):52–56. (In Russ.) Available at: https://www.rudmet.ru/journal/2039/article/34196/ (accessed: 07.03.2026).
11. Krasnyy B.L. Nauchno-tekhnicheskiy tsentr spetsial'noy keramiki «Bakor» – podderzhka fondov opredelila nashe razvitie. Innovatsii. 2009;(S2):61–63. Krasny B.L. Scientific-technical center of special ceramic "Bacor" – facility support identified our development. Innovations. 2009;(S2):61–63. (In Russ.)
12. Höfgen E., Kühne S., Peuker U.A., Stickland A.D. A comparison of filtration characterisation devices for compressible suspensions using conventional filtration theory and compressional rheology. Powder Technology. 2019;346:49–56. https://doi.org/10.1016/j.powtec.2019.01.056
13. Krasnyy B.L., Zimbovskiy I.G., Dmitrakova U.V., Chylbak-Ool E.D. Khimicheskiy sposob vosstanovleniya fil'truyushchey sposobnosti keramicheskikh filtruyushchikh elementov. Chernye metally. 2021;(11):4–9. https://doi.org/10.17580/chm.2021.11.01 Krasnyi B.L., Zimbovskiy I.G., Dmitrakova U.V., Chylbak-ool E.D. Chemical method of restoring the filtering ability of ceramic filter elements. Chernye Metally. 2021;(11):4–9. (In Russ.) https://doi.org/10.17580/chm.2021.11.01
14. Salmimies R., Kallas J., Ekberg B., Görres G., Andreassen J.-P., Beck R., Häkkinen A. The scaling and regeneration of the ceramic filter medium used in the dewatering of a magnetite concentrate. International Journal of Mineral Processing. 2013;119:21–26. https://doi.org/10.1016/j.minpro.2012.12.006
