FIELD: mineral fertilizers.
SUBSTANCE: invention relates to technology of manufacturing complex mineral fertilizers containing ammonium salts and potassium chloride. Process is characterized by mixing ammoniated evaporated nitrogen-phosphate solution with potassium chloride, granulating and drying product, treating dilute aqueous fertilizer solution, formed during gas treatment and having concentration of slats 15-20%, with alkali agent, especially calcium oxide, to pH about 10 at temperature not below 30°C at stirring for at least 5 min. Treated solution is concentrated and returned back to granulation.
EFFECT: avoided incrustation of heat-exchange equipment surfaces during evaporation of dilute aqueous fertilizer solution formed during gas treatment.
4 cl, 4 ex
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