Chemical Science International Journal

The manuscript provides the results of the process of obtaining activated phosphorus fertilizer (APF) by nitric acid processing of mineralized mass (MM) of phosphate waste, which formed during the sorting stage of thermal beneficiation of Central Kyzylkum (CK) phosphorites. For experiments was used MM with content 14.60% P₂O_5total(t.).; 3.07% P₂O_{5acceptable by citric acid (ac.c.a.)}; 43.99% CaO_t.; 1.01% MgO; 14.11% CO₂; 1.04% Al₂O₃; 0.89% Fe₂O₃; 1.58% SO₃; 1.30% F; 1.02% H₂O; CaO:P₂O₅ – 3.01 and 10.82% insoluble residual. The optimal concentrations and norms of nitric acid have been determined. Phosphorus fertilizer suspensions were neutralized with Ca(OH)₂ suspension in order to prevent P₂O₅ from passing into the solution. APF obtained in optimal parameters has the following composition (weight, %): 20.42-20.58 P₂O_5total(t.); 11.02-11.72 P₂O_5ac.c.a.; 38.87-39.01CaO_t.; 23,39-24,48 CaO _ac.c.a.. The degree of transition of P₂O₅ to liquid phase is 2.02-2.06%.