Principle of extrusion granulation of roller press granulator
Dry materials agglomerate into compact and hard bulk (cake material) under pressure, which is called extrusion process; the cake material is broken and sieved to become granular material, that is, granulation process. The function of extrusion for double roller fertilizer granulator is to expel the air between particles and make the distance between particles close enough to produce attraction such as van der Waals force, adsorption force, crystal bridge and embedded connection. The particles of the double roller press granulator are mainly formed by the force between the molecules.
1. Energy saving and consumption reduction.
Extrusion granulation is to granulate materials at normal temperature. Compared with other methods, no drying measures such as fuel oil and gas are required.
2. No additional adhesive is required.
3. Low investment.
Because the NPK fertilizer production process eliminates the drying process, at the same time, the return ratio is low, the process is simple, and the investment is low.
4. Flexible composition of raw materials.
There are more than 20 kinds of materials used in extrusion granulation: ammonium nitrate, urea, ammonium chloride, calcium nitrate, potassium chloride, potassium sulfate, etc. In addition, the use of extrusion granulation fertilizer manufacturing process can flexibly change the product formula in a very short time. A set of device can produce more than 30 kinds of formula products.
5. Green and environmentally friendly without waste discharge.
The roller fertilizer granulator is driven by electricity, the production process is green and environmentally friendly, and there is no three waste emissions. It is in line with the country's basic national policy on environmental protection and also in line with the company's environmental protection development strategy.