Authors: G.I. Kelbaliyev, M.M. Samedov, J.M. Mustafa-zade, S.G. Аliyeva, G.M. Mamedova, S.G. Javadova

Title of the article: Study of the process of obtaining phosphoric mineral fertilizer modified by microelements

Year: 2023, Issue: 3, Pages: 26-34

Branch of knowledge: 2.6.7. Technology of inorganic substances

Index UDK: 661.632.2.099.2

DOI: 10.26730/1999-4125-2023-3-26-34

Abstract: In order to obtain microelementized phosphate fertilizer, the process of decomposition of fluorapatite with sulfuric acid was carried out using the addition of datolite concentrate. The effect of datolite concentrate on the process of sulfuric acid decomposition of the feedstock was studied with the help of experiments. The obtained microelementized powdered mineral fertilizer was subjected to granulation in a cylindrical granulator by the pelletizing method. When granulating a powdered material, suspensions containing Fe2O3 and B2O3 were used as a moisturizing and binding liquid. Experimental studies have established that, in the case of sulfuric acid decomposition of fluorapatite using datolite concentrate, the optimal amount of additive should be considered 6-10% by weight of the feedstock. At the same time, the degree of decomposition of fluorapatite in powdered mineral fertilizer is 94-96%. The resulting microelementized powdered phosphorus fertilizer was granulated in a laboratory granulator and the physicochemical and mechanical properties of the resulting product were determined. It has been established that with the use of modifying additives, granular phosphorus fertilizer has improved physical, chemical and mechanical properties, namely mechanical strength is 2.5 MPa, the yield of commercial fraction is 85% and is enriched with additional micronutrients - boron and iron. With the use of experimental indicators, a mathematical dependence was obtained between the mechanical strength of granules on the amount of additive, which adequately describes the experimental data

Key words: mineral fertilizers decomposition datolite concentrate granulation microelements

Receiving date: 19.04.2023

Approval date: 15.06.2023

Publication date: 30.06.2023

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