Properties of complex ammonium nitrate-based fertilizers depending on the degree of phosphoric acid ammoniation

Abstract

Complex ammonium nitrate-based NP and NPK fertilizers are multicomponent salt systems prone to high hygroscopicity, caking and explosive thermal decomposition. The slurries that used in the production of these fertilizers can also exhibit insufficient thermal stability. One of the most important issues for such slurries is their viscosity, which determines the energy costs for transportation and processing into the final product. Increasing the degree of phosphoric acid ammoniation helps to reduce the ammonium nitrate's content in the product, but the main question remains about the properties of such fertilizers. This article is devoted to studying properties of complex NP and NPK ammonium nitrate-based fertilizers and their intermediates with increasing the degree of phosphoric acid ammoniation.

Granular fertilizer caking: A research on the performance evaluation of coating agents

“…NP and NPK type inorganic fertilizers are basically a combination of powdered raw materials and multicomponent salt systems granulated upon heating and humidification, which are highly hygroscopic and have a high tendency for agglomeration [25].…”

Thermal stability of systems containing ammonium nitrate and sulfate salts: an experimental study

“…Another equally important aspect is related to the polymorphism of AN -the phase stabilization caused by introduced additives [18,19]. That treatment removes crystallographic transformations of AN, so that granulated ammonium nitrate-based products retain their mechanical properties [20,21]. Furthermore, selected additives decide the shape, durability and porosity of produced granules [22,23].…”

Experimental Determination of Osmotic Coefficient and Salt Solubility of System NH4NO3–NH4H2PO4–H2O and Their Correlation and Prediction with the Pitzer–Simonson–Clegg Model

“…Ammonium dihydrogen phosphate (NH 4 H 2 PO 4 ) and ammonium nitrate (NH 4 NO 3 ) have various industrial and commercial applications. Some common applications of these compounds include fertilizers and provide essential nutrients to plants, including nitrogen and phosphorus. − Ammonium dihydrogen phosphate is used as a flame retardant in the production of various materials such as plastics and textiles. It is effective in reducing the flammability of these materials .…”