| 摘要 |
FIELD: production of complex fertilizers, in particular, nitrogen-phosphorus-ammonium sulfate-phosphate fertilizer. SUBSTANCE: method includes neutralization of phosphoric and sulfuric acids with ammonia; granulation and drying of ready-made product. Sulfuric acid with concentration of 70-93% is supplied to zone of neutralization of phosphoric acid with pH 4.6-5.8. Fertilizer characteristics is the following: hygroscopic coefficient, 1: composition of ready-made product: assimilation % of P<SB>2</SB>O<SB>5</SB>, 20-31; N, 15-17.14; N : P<SB>2</SB>O<SB>5</SB> = 0.48-0.86. EFFECT: preserved high physical properties of fertilizer with reduced process duration. 1 tbl |
