The first type is the urea crusher. When choosing urea as a raw material of nitrogen, this type is the best choice. The speed and diameter of the urea crush are adjustable. It crushes materials by the gap between the roller and the concave. The inlet size should be smaller than 4mm and inlet moisture should be less than 5%. The output size of this machine is 0.3-0.5mm.
The second type is the cage crusher. It is widely used in compound fertilizer crushing and also as a medium-sized horizontal cage bar crusher. Among the three crushers, the cage crusher allows the largest inlet sizes (about 280*320mm). Furthermore, it has a compact structure(1500*1500*1500mm).
The third type is a chain crusher. We can divide it into two types: vertical chain crushers with a single rotor and horizontal chain crushers which with double rotors. You can use it in compound fertilizer production and the crushing of return materials after the screening.
After crushing raw materials, you need to batch them and then mix them. As for the mixing process, double shafts horizontal mixer, BB fertilizer mixer, and drum type BB fertilizer mixer are suitable for mixing NPK fertilizer. BB fertilizer overcomes the mixtures chromatography and distributaries phenomena caused by different proportions of raw materials. Otherwise, you can use drum type BB fertilizer mixer in large-scale NPK production, for it can achieve continuous production and the output can reach 30-40 tons per hour.