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COMPLEX RAW MATERIAL UTILIZATION
Название Comprehensive processing of phosphate ores into new types of fused fertilizers
DOI 10.17580/or.2024.03.06
Автор Denisova O. V., Karapetyan K. G., Shakhparonova T. S.
Информация об авторе

Empress Catherine II Saint Petersburg Mining University (St. Petersburg, Russia)

Denisova O. V., Associate Professor, Candidate of Chemical Sciences, Associate Professor, denisova_ov@pers.spmi.ru
Karapetyan K. G., Head of Chair, Doctor of Engineering Sciences, Associate Professor, karapetyan_kg@pers.spmi.ru
Shakhparonova T. S., Associate Professor, Candidate of Chemical Sciences, Associate Professor, shakhparonova_ts@pers.spmi.ru

Реферат

This article examines the advantages and disadvantages of industrial processes for converting phosphate ores into new types of fused fertilizers, such as the AVA complex glassy fertilizer. The discussion includes the potential uses of these fertilizers, their production features, and applications for agronomic purposes. Data on the raw material composition are provided. The benefits of producing and using the AVA complex glassy fertilizer are highlighted. Derivatographic studies conducted on the initial charge and glassy products with varying phosphorus and silicon dioxide content were used to establish the sintering and melting temperature ranges. It has been found that the AVA complex glassy fertilizer is partially water-soluble. The kinetics of its dissolution have been studied, revealing a significant dependence on temperature: dissolution rates increase with higher K2O and SiO2 content, but are practically unaffected by the microelement content in the glass. The composition of the AVA fertilizer can be adjusted based on climatic conditions, soil types, and crops cultivated. Phosphate glasses developed from processed phosphate ores are promising materials, enabling the production of environmentally friendly glassy fertilizers and porous glassy sorbents through thermal methods. Gentle crushing without over-grinding is an essential aspect of preparing these brittle glassy fertilizers for agricultural use. Disintegration in vertical vibrating cone crushers appears to be the preferred method. Overall, the use of glassy phosphate fertilizers is an example of comprehensive low-waste utilization of mineral raw materials based on advanced domestic combined technologies.

Ключевые слова Phosphate ores, thermophosphates, fused phosphorusmagnesium fertilizers, acid-free fertilizer production methods, thermochemical technologies, complex glassy fertilizers
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