INVESTIGATION OF NITRIC ACID DECOMPOSITION OF UNTREATED PHOSPHORITE ORE FROM THE KARAKATIN DEPOSIT
Authors
Erkinov Nodirbek Zufar o‘g‘li, Yorbobayev Ruslan Choriyvich, Mirzaqulov Xoltura Choriyevich
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Annotation
This study investigated the decomposition of low-grade phosphate ore from the Karakatin deposit using nitric acid. The chemical composition of the slurry, liquid phase, and solid residue formed under different nitric acid dosages (100–120%) and solid-to-liquid (S:L) ratios (1:2.5–1:4.0) was analyzed. The results demonstrated that increasing the nitric acid dosage and the S:L ratio promoted the transfer of phosphorus-containing components from the phosphate ore into the liquid phase. In addition, a decrease in the P₂O₅ content of the solid residue and an increase in the concentration of nitrate compounds in the liquid phase were observed during the decomposition process. The findings provide a scientific basis for determining the optimal technological parameters for processing low-grade phosphate ore and improving the efficiency of nitrogen-phosphorus mineral fertilizer production.
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Authors
Erkinov Nodirbek Zufar o‘g‘li, Yorbobayev Ruslan Choriyvich, Mirzaqulov Xoltura Choriyevich
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References:
Erkinov, N., Mirzakulov, X., Saidmaxmudova, N., & Yorboboev, R. (2025). Investigation of the process of obtaining nitrogen-phosphorus-calcium fertilizers based on washed and calcined Kyzylkum phosphoconcentrate using nitric acid and ammonia. Bulletin of the National University of Uzbekistan, pp. 489–492. ISSN 2181-7324.
Gunin, V.V. (2008). Technology of complex calcium-containing fertilizers based on nitric acid decomposition (Candidate of Technical Sciences Dissertation). Ivanovo.
Khan, M., & Rashid, A. (2022). Recent developments in phosphate fertilizer technologies. Agriculture.
Mirzakulov, X.Ch. (2009). Development of resource-saving technology for processing Central Kyzylkum phosphorites into phosphorus-containing fertilizers (Doctor of Technical Sciences Dissertation). Tashkent.
Namazov, S., Temirov, U., & Usanbaev, N. H. (2019). Research of the process of obtaining organo-mineral fertilizer based on nitrogen acid decomposition of non-conditional phosphorites of Central Kyzylkumes and poultry cultivation waste. International Journal of Innovative Technology and Exploring Engineering, 8 (12), 2260–2265. https://doi.org/10.35940/ijitee.L2529.1081219
Volinskova, N.V. (2019). Development and improvement of the technology for the production of extraction phosphoric acid from Central Kyzylkum phosphorites (Doctor of Technical Sciences Dissertation). Tashkent.
Zikirov, H.A. (2025). Processing of Central Kyzylkum phosphorites with sulfuric and nitric acids into nitrogen-phosphorus and nitrogen-phosphorus-potassium complex fertilizers (PhD Dissertation). Tashkent.
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