This study investigates the production of azosuperphosphate fertilizer by treating high-carbonate, lowgradeCentral Kyzylkum phosphorites with ammonium sulfate dissolved in sulfuric acid at various stoichiometric ratios.The phosphorite raw material contains 16.2% P₂O₅, 46.2% CaO, and 17.7% CO₂. Experiments were conducted underlaboratory conditions at room temperature using four solution compositions containing 5–20 g of ammonium sulfate per100 g of 93% H₂SO₄ at stoichiometric rates of 60–100%. Results showed that increasing ammonium sulfate content to 20%and applying acid at a 100% stoichiometric rate increased plant-assimilable P₂O₅ by 4.90–5.51 times compared with theinitial raw material. Granulometric analysis confirmed the formation of granules predominantly in the 1–5 mm range withmechanical strength of at least 1.2 MPa. The findings provide a scientific basis for producing efficient azosuperphosphatefertilizer from domestic phosphorite resources.
| Mualliflar | Saidov , Hakimboy |
|---|---|
| Jurnal | Муҳандислик ва Иқтисодиёт |
| Nashr sanasi | 2026-04-01 |
| Jild | 4 |
| Son | 4 |
| Til | Ingliz |
azosuperphosphate, low-grade phosphorite, Kyzylkum, ammonium sulfate, sulfuric acid, phosphate decomposition, mineral fertilizer, granulation, P₂O₅ assimilability
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