FIELD: fertilizers, chemical technology.
SUBSTANCE: invention relates to a method for preparing granulated ammophos. Method involves neutralization of phosphoric acid with ammonia, granulation of product by pulp raising dust on the recycle particles in the presence of acid agent added in the amount necessary for providing pH value of granulated mixture 3.5-4.8 and simultaneous drying the ready product. Acid neutralizing agent is applied preliminary on the recycle granules surface at temperature 70-90°C wherein the recycle is taken with granules strength 3-8 MPa. As acid agent method involves using phosphoric and/or sulfuric acids. Invention provides increasing yield of commercial fraction 2-5 mm up to 80-90%.
EFFECT: improved preparing method.
2 cl, 1 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING GRANULAR AMMOPHOS | 2008 |
|
RU2370477C1 |
| METHOD OF PELLETISING AMMONIUM PHOSPHATES AND DEVICE TO THIS END | 2010 |
|
RU2450854C1 |
| GRANULATED CONDITIONED FERTILIZER MANUFACTURE PROCESS | 2004 |
|
RU2258054C1 |
| METHOD OF PRODUCTION OF AMMOPHOS | 2001 |
|
RU2200722C2 |
| METHOD OF PRODUCTION OF COMPLEX FERTILISER | 2013 |
|
RU2541641C1 |
| METHOD FOR PRODUCING COMPLEX FERTILIZER | 0 |
|
SU1082779A1 |
| METHOD OF PRODUCING AMMONIUM PHOSPHATE | 0 |
|
SU1399301A1 |
| METHOD FOR PREPARING COMPLEX FERTILIZERS | 2003 |
|
RU2230051C1 |
| METHOD OF OBTAINING SULPHOAMMOFOS | 2008 |
|
RU2396236C2 |
| METHOD OF PRODUCING AMMOPHOS | 2004 |
|
RU2263091C1 |
