NPK Compound fertilizer, also known as chemical fertilizer, is a fertilizer produced by a chemical reaction synthesis method between chemical fertilizers or mixed methods containing any two or three kinds of nutrient elements nitrogen, phosphorus and potassium. The compound fertilizer has the characteristics of high active ingredient, easy to dissolve in water, quick decomposition, and easy to be absorbed by roots, so it is called "quick-acting fertilizer". Its role is to meet the comprehensive needs and balance of multiple nutrients needed for agriculture under different production conditions.
The NPK fertilizer production process
consists of several processes: raw material crushing, raw material batching, mixing, granulation, drying, cooling, sieving, and packaging.
Some raw materials before the batching measurement need to be pulverized first, and the materials enter the feeding port of the pulverizer, and the pulverizing machine performs high-speed operation to pulverize the materials to achieve the fineness required for granulation.
The automatic batching system strictly follows the requirements of the amount of each raw material added by the technicians, and adds various raw materials such as N, P, K, and additives to the electronic belt scale. The raw material is added in the process of requiring the raw materials to be powdery or granular, and no knot is allowed. Block phenomenon.
After the compound fertilizer raw materials are accurately weighed and distributed, they are conveyed by the belt conveyor to the mixer for uniform mixing and agitation, and the material agitation process enables the material to be better fused and granulated.
Fertilizer granulator machine
The agitated raw material enters the belt conveyor and is conveyed to a drum granulator for granulation.
The material to be dried enters the drying area of the lifting plate with special combination. Due to the tilting and turning movement of the body and the copy board, the material is continuously thrown away by the lifting plate and longitudinally moved, at the same time, it has sufficient heat exchange with the constant temperature control heat transfer from the hot blast stove to evaporate water to make the material dry.
The cooling after drying can directly cool the hot particulate material to near normal temperature. The cooled material facilitates quick and timely packaging to prevent agglomeration during storage in the fertilizer manufacturing process
Screening is mainly to separate the fine powder, finished product and large granular material in the material. First, the fine powder in the semi-finished product is separated, and the large particles are separated. After separation, the large particles are pulverized and enter the return belt together with the separated fine powder, and returned to the fertilizer granulator machine for granulation.
The finished product is transported by the conveyor to the silo of the packaging machine, and is discharged to the weighing scale body for automatic weighing and sewing into the finished product warehouse to complete the NPK fertilizer production line process according to the set weight.
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