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Thermotribochemical treatment of low grade natural phosphates

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Abstract

Stability of mineral mixed fertilizers processed by effective mixing and compaction, using extrusion technology, is a subject of this study. As new products there is a need to learn the possible changes in the phase ratios and caking processes during long term storage. 7 samples with different nutrient components ratios are investigated after one year kept in a storage facility without conditioning.

Applying TG-DTA, electron microscopy and X-ray diffraction methods samples are studied, recording thermal effects and mass losses, type of crystal structures and phase content in the sample. On the base of the results obtained the relationships are discussed and conclusions made about the possibility to safety storage and visible application of the new products as fertilizers in the agriculture for nut ratio of different plant. It is confirmed that the investigated samples, produced on the base of low grade phosphates are stable during long term storage and they could be successfully recommended for practical use in agriculture, using traditional or individual method of fertilization.

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Authors and Affiliations

  1. University of Chemical Technology and Metallurgy, Sofia, Bulgaria, 1756, 8 Kl. Ohridski Str.

    Y. Pelovski & I. Dombalov

  2. Central Laboratory of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Sofia, Bulgaria, 1113, Acad. G. Bonchev Str., Bl. 107

    V. Petkova

Authors
  1. Y. Pelovski
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  2. V. Petkova
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  3. I. Dombalov
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Correspondence to Y. Pelovski.

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Pelovski, Y., Petkova, V. & Dombalov, I. Thermotribochemical treatment of low grade natural phosphates. J Therm Anal Calorim 88, 207–212 (2007). https://doi.org/10.1007/s10973-006-8095-z

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  • DOI: https://doi.org/10.1007/s10973-006-8095-z

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