Технологія NPCа-добрив з використанням карбаміду та фосфоритів з низьким вмістом фосфору (V) оксиду

Abstract

Dissertation for degree of candidate of technical sciences, specialty 05.17.01 - Technology of inorganic substances. - National Technical University "Kharkov Polytechnic Institute", Kharkov, 2015. Dissertation is devoted to development of scientific bases of technology NPCa - involving phosphorus fertilizer raw materials with low content of phosphorus (V) oxide. For the first time on the basis of thermodynamic calculations and experimental studies, X-ray analysis of a list of reactions in the process of interaction with the urea nitrogen - acid extract (NAE). Defined technological parameters of the interaction of urea with nitrogen - acid extract and ammoniation process NPCa-fertilizers and developed concept that allows you to receive a number of complex NPCa-fertilizer with trace elements of non-waste technology using phosphorus-containing raw materials in Ukraine are low in phosphorus (V) oxide. It was found that the interaction of urea with the nitrogen - acid extract is happening in the kinetic region, established kinetic model of the process, found the rate constants, activation energy. A mathematical model that allows you to calculate the technological parameters of the process and the chemical synthesis reactor. The resulting complex NPCa - fertilizer with trace elements due to the high content of water-soluble and digestible forms of Р₂О₅ and CaO in the agro-chemical tests at the National Scientific Center "Institute for Soil Science and Agricultural Chemistry named after Sokolovsky" has shown an increase in crop yields of up to 12 ÷ 30 %. Prove their economic viability.