Аннотация
Liquid mineral fertilizers are highly effective, cost-effective complex fertilizers intended for application to various agricultural crops and virtually any soil. Recently, the main raw material for obtaining EPA is phosphorites of the Karatau deposit (m.) Kistas. The aim of the work is to study the elemental and material compositions of phosphorus flour (4 samples) from phosphorites of the Kistas deposit (Karatau) and conduct their comparative analysis. Results and discussion. Results and discussion. A system analysis of phosphorites from the Kistas deposit was carried out using modern physicochemical (RFlA, semi-quantitative RFlA, AES, IR) and chemical methods (four samples). The results showed that the phosphorus meal of one deposit is characterized by a variable composition. Chemical analysis, AES, and the gravimetric method of phosphorus meal confirmed the data of X-ray fluorescence analysis. The studied phosphorus meal samples are represented by phosphate, carbonate, aluminosilicate, and silicate components. Conclusion. Physicochemical studies of the composition and structure of phosphorus meal from the Kistas deposit showed that the phosphorus meal of one deposit is characterized by a variable composition. Phosphorite meal contains from 18 to 22 elements, the main phases are: Sr-containing fluorapatite, Fe-containing fluorapatite, quartz, iron-containing akermanite (variety), sodium sulfate, jadeite, calcite. The obtained data will allow for a deeper decomposition of Koksu phosphate flour to produce EPA.