METHOD OF PREPARING MOISTURE-PROOF UREA SPECIFICALLY FOR BLENDED FERTILIZER

摘要

A method of preparing moisture-proof urea specifically for a blended fertilizer, characterized by: adding granular urea into a front end of a coating drum, a disc, or a mixer having a mixing function and spray coating the granular urea with a layer of a dedicated moisture-proof agent; and spray coating the granular urea with a layer of modified magnesium oxide powder in a rear end of the coating drum, the disc, or the mixer having a mixing function to obtain the moisture-proof urea specifically for a blended fertilizer. The urea prepared by the method can be stably mixed with an acidic fertilizer such as calcium superphosphate without absorbing moisture, becoming moist, or caking.