STUDY OF IRON MINERALS IN THE MINERALOGICAL COMPOSITION OF KHOJAKUL AND PORLITAU PHOSPHORITES
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Abstract
This study investigates iron-bearing minerals in the mineralogical composition of phosphorites from the Khodzhakul and Porlytau deposits in Karakalpakstan and analyzes their impact on the agrochemical value of phosphorus. Alongside phosphate minerals (francolite and kurskite), iron compounds were identified in the phosphorites of both deposits. Specifically, the Khodzhakul phosphorites contain goethite (0.86%), limonite (2.78%), and pyrite (0.84%), while the Porlytau phosphorites contain limonite (2.93%) and goethite (0.89%). These minerals restrict the conversion of phosphorus into its water-soluble form, thereby reducing the effectiveness of agrochemicals as fertilizers. Based on the results, the necessity of implementing selective separation technologies for iron-bearing minerals during phosphorite processing is substantiated. The findings provide a significant scientific foundation for choosing iron separation methods and optimizing the production of high-quality phosphate fertilizers from phosphorites.
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