METHOD OF PRODUCTION OF GRANULATED LIME-AMMONIA FERTILIZER Russian patent published in 2003 - IPC

FIELD: methods of production of granulated mineral fertilizers widely used in agriculture. SUBSTANCE: method of production of lime-ammonia fertilizer in drum-type granulator-dryer includes spraying of moist suspension with air supplied at pressure with formation of spray cone directed to dry product curtain (recycle) formed by mixing external and internal recycles with their ratio of 1:(4-5), respectively, removal of moisture in flue gas current at temperature of 210- 270 C, subsequent cooling and classification of product. In so doing, air for spraying is supplied at pressure of 1.5-2.5 gage atm., and length of free spray cone of sprayed suspension varies within 35-75 cm. EFFECT: reduced dust entrainment, increased fraction of product granules sizing 2-4 mm. 2 cl