1. The particle size of rotary drum spraying granulation is hard, and the fertilizer efficiency is longer than that of high tower granulation. It should not be lost and is easy to use as a base fertilizer for crops with long growth periods. The disadvantage is that nitrogen is easily lost during chemical synthesis, so there is a secondary nitrogen addition process.

2. The high tower granulation particles are smooth, hollow anti-counterfeiting, balanced in content, and NPK can be freely adjusted. The fertilizer effect is fast in compound fertilizer, easy to dissolve, and suitable for topdressing. The disadvantage is that during granulation and spraying, urine melts, and if the process time and flow are not well controlled, a large amount of biuret is easily produced. In addition, the moisture content during production is prone to exceed the standard.

3. Ammoniation granulation is a process of pipe spraying to form granules, with a fertilizer efficiency period between drum and rotary drum spraying. Its utilization rate is better than that of spraying, but lower than that of high tower granulation. It has good water solubility and irregular granules. The content of high nitrogen and potassium can be freely adjusted, making it suitable for formula fertilization.

4. The drum granulation process is simple, but the granulation is smooth, the quality of raw materials is uneven, and the effect is also different. The water solubility and utilization law are low, and it is easy to lose. However, in drought years, the fertilization effect for crops with shorter growth periods is faster than that of drum spraying granulation.

There are generally several production processes for compound fertilizers, including spray granulation, ammonification granulation, high tower granulation, and slow-release fertilizer. What is the difference between ammonification granulation and spray granulation? According to different granulation methods, the melt granulation method for composite fertilizer can be mainly divided into: granulation tower spray granulation process, oil cooled granulation process, biaxial granulation process, rotary drum granulation process, spray granulation process, disc granulation process, steel strip granulation process, etc. The main difference between spray granulation and ammoniation granulation is in the granulation method. Spray granulation is a process where self forming particles form a material curtain in the form of return material, which is then combined with the sprayed slurry and coated layer by layer to form granules.