The compound chemical fertilizer refers to a chemical fertilizer containing two or more kinds of nutrients such as nitrogen, phosphorus and potassium. A binary compound fertilizer containing two nutrients and a ternary compound fertilizer containing three nutrients. The active ingredient of the compound fertilizer is generally expressed in terms of the corresponding percentages of N, P2O5 and K2O. According to different production methods, it can be divided into two types: compound fertilizer and mixed compound fertilizer. The main procedures to get the NPK fertilizer is first to crush all the all materials into powder,then mix them well,then all the powdery fertilizer are granulated into pellets in the granulator machine.
Compared to organic fertilizer
, the advantages of the NPK fertilizer
are high active ingredient, variety of nutrients; the secondary components are few and have little adverse effect on soil. low production cost; good physical properties. The disadvantages are the nutrient ratio is fixed, it is difficult to adapt to the different needs of various soil and various crops, often need to use single fertilizer supplement adjustment.
In the production of NPK fertilizer granules,the customers of choose to coat something on the surface of the granules to prevent of fertilizer caking or get the effect of slow release.the coating materials are in many varieties.the customer always choose according to their requirements on the market.when in coating process,our coating machine will be used to realize this technology.
The rotary coating machine
is lined with polypropylene or acid resistant stainless steel of the main body. The coated materials will be adhered to the fertilizer granules surface of with a powder coating machine or a liquid melting pot. after the pellets are coated,they will be flow out from the outlet.The finished products granules are uniform, round, beautiful appearance and have good effect. It is commonly use machine in organic fertilizer production line, NPK compound fertilizer production line, and BB fertilizer production line.