Roller granulator for compound fertilizer production

The utility model provides a roller pelletizer for compound fertilizer production, which belongs to the technical field of compound fertilizer production and comprises a base and a pelletizer arranged on the base, a blanking mechanism is arranged on the pelletizer, a screening bin is arranged on the side edge of the base corresponding to a blanking port of the pelletizer, a screening mechanism is arranged on the screening bin, and the screening mechanism is arranged on the screening bin. A discharging pipe is arranged on the screening bin corresponding to the screening mechanism, a material collecting basin is arranged corresponding to the discharging pipe, and a backflow mechanism is arranged corresponding to a discharging opening of the screening bin. According to the utility model, compound fertilizer particles can be screened, and some particles which are smaller and do not meet the standard enter the granulator again through the reflux mechanism for processing, so that the compound fertilizer particles d