UDC 661.634.22:661.8

Dormeshkin Oleg Borisovich – DSc (Engineering), Professor, Professor, the Department of Inorganic Materials Technology and General Chemical Technology. Belarusian State Technological University (13a Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: dormeshkin@yandex.ru

Hauryliuk Andrey Nikolayevich – PhD (Engineering), Accociate Professor, Vice Rector for Academic Affairs. Belarusian State Technological University (13a Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: gavriluk_andrew@mail.ru

Mokhart Mark Sergeevich – PhD student, the Department of Inorganic Materials Technology and General Chemical Technology. Belarusian State Technological University (13a Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: markmohort@gmail.com

Byshyk Aleksandr Aleksandrovich – Master’s degree student, the Department of Inorganic Materials Technology and General Chemical Technology. Belarusian State Technological University (13a Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: fxguru29@gmail.com

DOI: https://doi.org/ 10.52065/2520-2669-2025-289-4.

Key words: complex fertilizers, salt deposits, mineralogical composition, phosphorus, potassium, nitrogen, tubular reactor, conversion.

For citation: Dormeshkin O. B., Hauryliuk A. N., Mokhart M. S., Byshyk A. A. Study of the mineralogical composition of complex fertilizers and salt deposits of tubular reactors of the double superphosphate plant of JSC “Gomel Chemical Plant”. Proceedings of BSTU, issue 2, Chemical Engineering, Biotechnologies, Geоecology, 2025, no. 1 (289), pp. 27–36 (In Russian). DOI: 10.52065/2520-2669-2025-289-4.

Abstract

The results of the study of the chemical and mineralogical composition of complex fertilizers and salt deposits of tubular reactors of the double superphosphate shop of JSC “Gomel Chemical Plant” are presented. The results obtained confirm the assumption about the influence of the composition and ratio of initial components, the conditions of their introduction into the technological process on the qualitative and quantitative composition of target products, as well as the fact that the data on the chemical composition of fertilizers do not allow to fully characterize their quality, agrochemical efficiency and predict the nature of the transition of nutrients into soil solutions and plants. Attention is drawn to the absence of calcium phosphates in the samples, which is one of the main phases of complex fertilizers based on superphosphates. The main amount of sulfate ions is present in the composition of double salts of potassium-ammonium sulfate, potassium sulfate. In addition, the sample of grade 10-20-20:(B, Zn) contains a significantly higher amount of potassium sulfate compared to grade 8-24-24, which also indicates the course of secondary conversion processes with the participation of potassium chloride and is confirmed by a significant decrease in its content from 32.82 (for brand 8-24-24) to 18.36%, as well as an insignificant content of ammonium sulphate in the samples, formed at the stage of ammonization of sulfuric acid due to its participation in the processes of exchange decomposition. According to the results of chemical analysis of individual layers, it was established that the main component is potassium compounds, mainly sulphates and phosphates. Based on the results of chemical and X-ray phase analysis, the quantitative calculation of the content of individual phases of sediments for grade 10-20-20:(B, Zn) confirms the difference in the composition of salt sludge from the composition of the target product (fertilizer), as well as a significant difference in the composition and content of individual phases from salt sludge for fertilizer grade 8-24-24. In particular, the main amount of potassium is present in the composition of potassium sulfate, and the main amount of phosphorus is in the composition of ammonium hydrogen phosphate. The absence of potassium chloride in the composition of sediments confirms the fact of secondary conversion processes on the surface of the tubular reactor.

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References

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05.11.2024