STUDIES ON OBTAINING AZOSUPERPHOSPHATE BY TREATING HIGH-CARBONATE, LOW-GRADE CENTRAL KYZYLKUM PHOSPHORITES WITH VARIOUS DOSAGES OF AMMONIUM SULFATE AND SULFURIC ACID
DOI:
https://doi.org/10.5281/zenodo.19995977Keywords:
azosuperphosphate, low-grade phosphorite, Kyzylkum, ammonium sulfate, sulfuric acid, phosphate decomposition, mineral fertilizer, granulation, P₂O₅ assimilabilityAbstract
This study investigates the production of azosuperphosphate fertilizer by treating high-carbonate, lowgrade
Central Kyzylkum phosphorites with ammonium sulfate dissolved in sulfuric acid at various stoichiometric ratios.
The phosphorite raw material contains 16.2% P₂O₅, 46.2% CaO, and 17.7% CO₂. Experiments were conducted under
laboratory conditions at room temperature using four solution compositions containing 5–20 g of ammonium sulfate per
100 g of 93% H₂SO₄ at stoichiometric rates of 60–100%. Results showed that increasing ammonium sulfate content to 20%
and applying acid at a 100% stoichiometric rate increased plant-assimilable P₂O₅ by 4.90–5.51 times compared with the
initial raw material. Granulometric analysis confirmed the formation of granules predominantly in the 1–5 mm range with
mechanical strength of at least 1.2 MPa. The findings provide a scientific basis for producing efficient azosuperphosphate
fertilizer from domestic phosphorite resources.
References
Eminov A.M., Boyjanov I.R., Djabberganov Dj.S., Eminov Al.A. Physical and mechanical properties of ceramic tile
based on the clay–dune sand composition. Glass and Ceramics, Vol. 81, No. 3–4, 2024, pp. 39–44.
Buranova D., Matchanov S., Atashev E. (2025). Physicochemical and mineralogical characterization of Sultan Uwais
feldspar for sustainable glass manufacturing in earth and environmental sciences. In E3S Web of Conferences, Vol.
, p. 06001. EDP Sciences.
Buranova D.B. (2027). Main characteristics of quartz-feldspar sands from the Khiva deposit, and the physicochemical
and technological fundamentals of obtaining an enriched concentrate. Kompleksnoe Ispolzovanie Mineralnogo Syra,
(1), pp. 37–44.
Buranova D.B., Yunusov M.Y., Babaev Z.K., Matchanov Sh.K. On the use of cobalt-containing metallurgical waste to
obtain colored glass and glass enamel. Glass and Ceramics, 2022, Vol. 79, No. 7–8, pp. 300–305.
Matchanov Sh.K., Ruzmetova A.Sh., Yakubov Y.X. Khodzhakul kaolins of Uzbekistan: composition, physical and
chemical properties, and processing methods. Obogashchenie Rud, 2023, Vol. 5, pp. 27–32.
Ruzmetova A., Babaev Z., Yunusov M. Preparation and investigation of a heat-resistant binder with a metakaolin
additive made of Aral Sea raw materials. Refractories and Industrial Ceramics, Vol. 64, No. 4, 2023, pp. 383–387.
Masharipova Sh.M., Kadyrova Z.R., Danilovich D.P., Ataeva F.A., Masharipova Z.A. Development of ceramic brick
compositions for restoration of historical heritage based on loess–defecate composition. Steklo i keramika, 2024,
(05), pp. 17–22.
Khadzhiev A., Atabaev F., Jumaniyozov A., Yakubov Y. (2024). Study on pozzolanic activity of porphyrites of the
Karatau deposit. E3S Web of Conferences, 563, 02029.
Lesovik V.S., Zagorodnyuk L.Kh., Babaev Z.K., Dzhumaniyazov Z.B. Ceramic road-brick for sidewalk pavement in the
regional surrounds of the Aral Sea. Glass and Ceramics, 2023, Vol. 80, No. 7–8.
Atashev E.A. (2026). Decomposition of magnesite-sparing waste in sulfuric acid with a high concentration: empirical
modeling and determination of optimal conditions. Kompleksnoe Ispolzovanie Mineralnogo Syra, 339(4), pp. 71–78.
Jumaniyazov M., Kurambayev S., Atashev E., Jumaniyozov A., Buranova M. (2025). Determination of the composition
of the Zinelbulak talc-magnesite deposit rock using modern physicochemical methods. In E3S Web of Conferences,
Vol. 633, p. 06002. EDP Sciences.
Jumaniyazov M., Kurambayev S., Atashev E., Aitova S., Pirnapasova H. (2025). The extraction of talc from Zinelbulak
talc-magnesite raw materials. In AIP Conference Proceedings, Vol. 3304, No. 1, p. 040043. AIP Publishing LLC.
Poleznye iskopaemye. Glavnyy redaktor E.A. Kozlovskiy. Geologiya SSSR. Uzbekskaya SSR, Tom XXIII. Moscow:
Nedra, 1983, pp. 176–177.
Mineralno-syryevye resursy Respubliki Uzbekistan. https://uzsm.uz
Elyoratashevich A., Mukhitdinovich T.S., Kamilovna S.N. (2020). Production of azosuperphosphate with participation
of Central Kyzylkum phosphorites and ammonium sulphate. Journal of Critical Reviews, 7(7), pp. 358–362.
Atashev E., Tadjiev S. (2020). Obtaining azosuperphosphate from low-grade phosphates of the Central Kyzylkum.
Journal of Critical Reviews, 7(5), pp. 472–477.
Jumaniyazov M., Tadjiev S., Atashev E. (2021). Results of X-ray phase and IR-spectral analysis of azosuperphosphates
obtained on the basis of phosphorites of Central Kyzylkum. Chemical Technology, Control and Management, 3, pp.
–25.
GOST 30181.4–94. Mineral fertilizers. Method for determination of total mass fraction of nitrogen contained in
compound fertilizers and nitrate fertilizers in ammonium and nitrate forms (Devarda method). Moscow: Standards
Publishing House, 1996. 8 p.
GOST 30181.8–94. Mineral fertilizers. Method for determination of mass fraction of ammonium nitrogen in compound
fertilizers (chloramine method). Moscow: Standards Publishing House, 1996. 6 p.
GOST 20851.2–75. Mineral fertilizers. Methods for determination of phosphates. Moscow: Standards Publishing
House, 1997. 37 p.
Vinnik M.M., Erbanova L.N. et al. Methods of analysis of phosphate raw materials, phosphorus and compound
fertilizers, feed phosphates. Moscow: Khimiya, 1975. 218 p.
GOST 24596.4–81. Feed phosphates. Methods for determination of calcium. Moscow: Standards Publishing House,
3 p.
GOST 22275–90. Apatite concentrate. Technical specifications. Moscow: Standards Publishing House, 1991. 18 p.
GOST 24596.7–81. Feed phosphates. Methods for determination of fluorine. Moscow: Standards Publishing House,
5 p.
GOST 13455–91. Solid mineral fuel. Methods for determination of carbon dioxide of carbonates. Moscow: Standards
Publishing House, 2003. 11 p.
GOST 24596.5–81. Feed phosphates. Method for determination of pH of solution or suspension. Moscow: Standards
Publishing House, 2004. 2 p.
GOST 20851.4–75. Mineral fertilizers. Methods for determination of water content. Moscow: Standards Publishing
House, 2000. 5 p.
GOST 21560.2–82. Mineral fertilizers. Method for determination of static strength of granules. Moscow: Standards
Publishing House, 2003. 4 p.
Agarwal B.K. X-ray Spectroscopy. Berlin, Heidelberg, New York: Springer, 1991. 419 p.
Giller Ya.L. Tables of interplanar distances. In 2 vols. Moscow: Nedra, 1966. 330 p.
Downs R.T., Hall-Wallace M. The American Mineralogist crystal structure database. American Mineralogist.
Washington, 2003, Vol. 88, pp. 247–250.
Belsky A., Hellenbrandt M., Karen V.L., Luksch P. New developments in the Inorganic Crystal Structure Database
(ICSD): accessibility in support of materials research and design. Acta Crystallographica Section B: Structural Science.
Chester, 2002, Vol. 58, No. 3, pp. 364–369.
Böcker Yu. World of Chemistry. Spectroscopy. Moscow: Tekhnosfera, 2017. 536 p.
Nyquist R.A., Kagel R.O. Infrared Spectra of Inorganic Compounds (3800–45 cm⁻¹). New York: Academic Press,
495 p.
Monina L.M. Radiography. Qualitative X-ray Phase Analysis. Moscow: Prospekt, 2017. 120 p.
Zschornack G. Handbook of X-ray Data. Berlin, Heidelberg: Springer, 2007. 969 p.
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