NPK compound fertilizer is a kind of fertilizer which contains two or more elements of nitrogen, phosphorus and potassium. Compound fertilizer containing any two elements is called binary compound fertilizer, and fertilizer containing three elements is called ternary compound fertilizer. Compound fertilizers generally have granular appearance, different production processes and different colors.
NPK compound fertilizer has remarkable effect on improving quality and efficiency, increasing fertilizer utilization rate and improving agricultural product quality. Compound fertilizer has the advantages of wide application range, convenient use, low input and high efficiency, and remarkable economic benefits.
Granulating technology of NPK compound fertilizer production line
The conventional granulation methods of compound fertilizer can be divided into extrusion method and agglomeration method. The roller press granulator is used in the extrusion process. During the granulation process, the formwork is worn seriously, the service life is short, the power consumption is large, and the extruded particles are flaky and the fluidity is poor. The disc granulator and the drum granulator are used for granulating the dried fertilizer into fine powder, and then the disc granulator or drum granulator is used to roll the material into granules. The NPK compound fertilizer production line selected drum granulator.
Drum granulator is the key equipment in NPK compound fertilizer production line. It is suitable for hot and cold granulation and high, medium and low concentrations of mass production of compound fertilizer. The shell of the machine uses special rubber slab lining or acid-resistant stainless lining board which realizes auto scar removal and de-tumor instead of traditional drawknife equipment.
High balling strength, good appearance, corrosion resistance, wear resistance, low energy consumption.
long service life, easy operation and maintenance.
The pelletizing rate is up to 70%. There is a small amount of recycled material. The granularity of recycled material is small and it can be re-granulated.
Screening machine is used for separating finished products and returned materials, and can also achieve product classification, so that finished products can be evenly classified. The machine adopts combined screen, which is convenient for maintenance and replacement. Its structure is simple, easy to operate and stable operation. It is an ideal equipment in the production of compound fertilizer. NPK compound fertilizer production line is suitable for large and medium-sized fertilizer production. Two screening machines are used and the particles are screened twice. The final product quality is good and the shape is standard.
Primary screening: Sieve a small amount of powder. Secondary screening: Sieve the big granules. There are some non-uniform particles, after sieving get the appropriate granules that we need, the small diameter particle can be screened down for return granulating, the bigger granules transported to the crusher machine.
With the progress of market and the improvement of strength, the equipment of NPK compound fertilizer production line has been the main product of our company. Over the years, after our brand-new reform and promotion, the equipment has new characteristics and performance. The problem of non-uniform drying of materials has been thoroughly solved by using brand-new technology, and the internal structure has also been equipped with a unique delay device. It can prolong the residence time of materials in the dryer and improve the drying effect of wet fertilizer. The majority of users are very satisfied with the NPK compound fertilizer production line equipment.