Research of the Process of Obtaining Monocalcium Phosphate from Unconditional Phosphate Raw Materials

In the chemical industry, one of the promising areas is the development of effective technologies for obtaining high-quality mineral fertilizers and feed mineral fertilizers from unconditional phosphate raw materials and improving their technical and economic indicators and agrochemical properties of products. Moreover, the solution to these problems should be carried out on the basis of low-grade raw materials poor in phosphorus content. Such low-grade ores include phosphorites of the Chilisay mine. Phosphorites of this deposit have a number of specific features that create certain difficulties and contain a large number of carbonates, in terms of carbon dioxide reaching 4.56-6.34%, as well as glauconites. When decomposing such phosphorites, large volumes of very stable foam are formed, which complicates the decomposition of phosphorus raw materials and reduces the useful volume of the decomposition chamber by 60-80%, increases the loading time of phosphorite and, accordingly, increases the total time of the process. The objective of the work is to research the process of obtaining high-quality monocalcium phosphate, as well as to determine the optimal decomposition parameters of low-grade phosphate raw materials and to increase the product yield. Based on the conducted research of the Chilisayphosphorite decomposition, monocalcium phosphate was obtained.