FIELD: production of mineral fertilizer. SUBSTANCE: phosphoric acid is neutralized with ammonia, prepared pulp is granulated and dried by spraying in the flow of hot flue gases on the screen from granulated product. Flue gases were fed at temperature 800-1000 C at the rate 40-60 m/s, and granulation is carried out for 4-8 min. Process output is increased up to 21-26 t/h, granule strength up to 4.6-5.4 MPa, ammonia loss is decreased up to 13.3-17.5 kg/t product. EFFECT: increased output, enhanced product quality, decreased ammonia loss. 3 tbl
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