| 摘要 |
FIELD: production of complex fertilizers, such as triple nitroammophoska with use of potassium chloride as potassium component. SUBSTANCE: proposed method includes decomposition of phosphate raw material by nitric acid, mixing ammoniated suspension with potassium chloride, granulation and drying of target product by heating gases in drum-type granulator drier. According to invention, ammoniated suspension is evaporated to moisture content of 9.1-11 mass-% before mixing it with potassium chloride; temperature of heating gases at granulator inlet is not above 185 C, preferably 160 to 180 C; moisture content of ammoniated suspension with potassium chloride directed to granulator ranges from 7 to 13 mass-%. Proposed method enhances safety of granulation process with no reduction in productivity of granulator and makes it possible to make fertilizers containing N, P2O5 and K2O nutritious agents, 16 mass-% each. EFFECT: enhanced efficiency. 2 cl, 1 ex
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