RESEARCH OF PHYSICAL AND CHEMICAL TRANSFORMATIONS OCCURRING IN THE VOLUME OF GRANULES OF INTEGRATED MINERAL FERTILIZERS IN THE STORAGE PROCESS

UDC 661.152.3

  • Hauryliuk Andrei Nikolaevich – PhD (Engineering), Assistant 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: gavriluk_andrew@mail.ru 

  • Dormeshkin Oleg Borisovich – DSc (Engineering), Professor, Professor of 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

DOI: https://doi.org/10.52065/2520-2669-2021-241-1-126-138

Keywords: complex fertilizers, properties, phase composition, traceability, conversion processes, adducts, strength, storage.

For citation: Hauryliuk A. N., Dormeshkin O. B. Research of physical and chemical transformations occurring in the volume of granules of integrated miner-al fertilizers in the storage process. Proceedings of BSTU, issue 2, Chemical Engineering, Biotechnologies, Geoecology, 2021, no. 1 (241), pp. 126–138 (In Russian). DOI: https://doi.org/10.52065/2520-2669-2021-241-1-126-138.

Abstract

Based on the study of physical and chemical transformations occurring in the volume of complex mineral fertilizer granules during storage for various brands of complex NPK, the absence of a significant concentration gradient of individual components in the volume of complex-mixed fertilizer granules was established, which indicates the optimal organization of the technological process and method. introduction of nitrogen-, phosphorus- and potassium-containing ingredients. The data of X-ray phase analysis of samples of complex fertilizers confirm the course of conversion processes at the stage of warehouse storage of the final product. This is confirmed by the presence of clear reflections characteristic of double salts of potassium-ammonium, in particular, ammonium arcanite, as well as corresponding to the adduct of carbamide with potassium chloride in the samples at the initial moment of time (product arrival at the warehouse). New scientific data have been obtained on the course of secondary conversion processes at the storage stage, leading to a significant change in the mineralogical composition and, as a consequence, to a change in the physical and mechanical properties of fertilizers.

It has been established that when using prilled urea, the final product is subject to less caking compared to using granular urea as a raw material, which is associated with a slowdown in secondary conversion processes due to the additives present in the composition of prilled urea. Thus, the fact of a decrease in caking is noted for samples of fertilizers of the 15-15-15 brand, the formulation of which contains significantly less carbamide.

It has been established that when using prilled urea, the final product is subject to less caking compared to using granular urea as a raw material, which is associated with a slowdown in secondary conversion processes due to the additives present in the composition of prilled urea. Thus, the fact of a decrease in caking is noted for samples of fertilizers of the 15-15-15 brand, the formulation of which contains significantly less carbamide.

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References

  1. Klassen P. V., Gryshal’ Y. G. Osnovnye protsessy tekhnologii mineral’nykh udobreniy [Main processes of the technology of mineral fertilizers]. Moscow, Khimiya Publ., 1990. 304 p.
  2. Norov A. M., Sukhodolova V. Y. Applying the experience and scientific potential of JSC “NIUIF” to create and implement the best available flexible technologies for complex phosphorus-containing fertilizers. Trudy NIUIF: k 100-letiyu osnovaniya instituta [Proceedings of the NIUIF: to the 100th anniversary of the Institute’s Foundation], Vologda, 2019, vol. 2, pp. 250–261 (In Russian).
  3. Kononov A. V., Sterlyn V. N., Edokymova L. Y. Osnovy tekhnologii kompleksnykh udobreniy [Fundamentals of complex fertilizer technology]. Moscow, Khimiya Publ., 1988. 320 p.
  4. J. R. Lehr [et al.]. Crystallographic Рroperties of Fertilizer Compounds. Chem. Eng. Bull, 1967,
    no. 6, pp. 37.
  5. Kolpakov V. M., Kochetova Y. M., Norov A. M., Sokolov V. V. Comparative analysis of properties of granular NPK-fertilizers obtained by various methods. Trudy NIUIF: k 100-letiyu osnovaniya instituta [Proceedings of the NIUIF: to the 100th anniversary of the Institute's Foundation], Vologda, 2019, vol. 2, pp. 191–199 (In Russian).
  6. GOST 30181.4-94. Metod opredeleniya massovoy doli azota v udobreniaykh, soderzhashchikhsya v slozhnykh ydobreniyakh i selitrakh v ammoniynoy i nitratnoy phormakh [Method for determining the mass fraction of nitrogen in fertilizers containing nitrogen in nitrate form]. Minsk, Belorus. gos. in-t standartizatsii i sertifikatsii Publ., 1996. 6 p. (In Russian)
  7. GOST 30181.4-94. Metod opredeleniya summarnoy doli azota, soderzhashikh azot v nitratnoy phorme [Method for determining the mass fraction of amide nitrogen in complex fertilizers]. Minsk, Belorus. gos. in-t standartizatsii i sertifikatsii Publ., 1996. 9 p. (In Russian)
  8. GOST 30181.5-94. Metod opredeleniya massovoy doli amidnogo azota v slozhnykh ydobreniaykh [Mineral fertilizers. Method for determining the mass fraction of amide nitrogen in complex fertilizers]. Minsk, Belorus. gos. in-t standartizatsii i sertifikatsii Publ., 1996. 5 p. (In Russian)
  9. GOST 20851.3-75. Metody opredeleniya soderzhaniya kaliya [Mineral fertilizers. Methods
    for the determination of potassium content]. Moscow, Izdatel’stvo standartov Publ., 1983. 22 p.
    (In Russian)
  10. Kreshkov A. P. Osnovy analiticheskoy khimii [Fundamentals of analytical chemistry]. Moscow, Goskhimizdat Publ., 1961. 635 p.
  11. GOST 21560.1-82 – 21560.3-82. Ydobreniya mineral’nye. Metody ispytaniy [Mineral fertilizers. Test methods]. Moscow, Gos. kom. SSSR po standartam Publ., 1985. 19 p. (In Russian).
  12. JCPDS International Centre for Diffraction Data 2003.
  13. Dormeshkin O. B., Vorob'ev N. I., Cherches G. Kh., Gavrilyuk A. N. Study of the composition of products of JSC “Gomel Chemical Plant” exported to the EU countries and subject to registration in accordance with the REACH regulation. Trudy BGTU [Proceedings of BSTU], Series 3: Chemistry and Technology of Inorganic Substances, 2009, issue 17, pp. 92–97 (In Russian).
  14. Dormeshkin O. B. Rheological properties of urea-containing suspensions in the preparation of complex NPK and NPKS fertilizers. Khimicheskaya tekhnologiya [Chemical technology], 2016, no. 12,
    pp. 538–543 (In Russian).
  15. Dormeshkin O. B., Vorob'ev N. I., Cherches G. Kh., Gavrilyuk A. N. Low-waste technology for producing new types of sulfur-containing complex NPKS fertilizers. Trudy BGTU [Proceedings of BSTU], Series 3: Chemistry and Technology of Inorganic Substances, 2007, issue 15, pp. 3–8 (In Russian).
  16. Dormeshkin O. B. Features of chemical transformations occurring at the stage of granulation and drying of complex fertilizers in the presence of KCl. Trudy BGTU [Proceedings of BSTU], 2016, no. 3: Chemistry and Technology of Inorganic Substances, pp. 54–59 (In Russian).
11.11.2020