Fertilizer roller granulator with novel steam pipe

The utility model relates to chemical fertilizer processing equipment, in particular to a fertilizer roller granulator with a novel steam pipe. The fertilizer roller granulator comprises a roller (1) and the steam pipe (2), wherein the steam pipe is bent downwards from an inlet of the roller (1) along the inner wall of the roller (1) and is close to the inner wall of the bottom of the roller (1) to form a Z shape, an angle between a downwardly-bent angle and the vertical direction is between 25 degrees and 35 degrees, and a gap (3) which is vertical to a roller wall, is in gap arrangement and has a width of 45-55 mm is formed in the part of the steam pipe (2) in the roller (1). The fertilizer roller granulator has the benefit that as the steam pipe is directly inserted in a material stack, materials passing through the steam pipe are in full contact with steam, the sizes of granulated particles are relatively uniform, therefore the generation of waste materials is reduced, and the particles are mellow and smooth and have stable nutrient.