| 摘要 |
FIELD: fertilizers. SUBSTANCE: process involves double-step neutralization of extraction phosphoric acid by ammonia including separation of first-step precipitate, evaporation of solutions, granulation, and drying of final product, 60-95% of extraction phosphoric acid being fed into neutralization zone with pH 5.6-6.5 and liquid phase after separation of precipitate being mixed with the rest of extraction phosphoric acid. Separated precipitate shows elevated sedimentation properties. EFFECT: enabled production of high-quality ammophos from any phosphate stock. 1 tbl, 4 ex |
