How does the temperature effect on biomass pellets making

Temperature is a important element for pellets forming while production. Under a suitable temperature, lignin of the raw material will be united together. When the material is heated, lignin can be softened and the raw material itself also can be softened, it makes them easier to be formed. How does the temperature effect on biomass pellets making? Please check blow.

Although pellet machine does not have heating part, but in the process of forming, friction between raw material and surface of the pellet machine becomes the heating source. When the temperature reaches 100℃, softened lignin will act as binder.

In practice, during production when temperature between 80-130 ℃, pellets are stable and have beautiful surface, lignin is fully released; 200 ℃ the pellets almost can＇t be formed; between 210-220 ℃ surface is not smooth; between 210-230 ℃ the pellets will have the dust-color; between 240-260 ℃ the color is grey-black; over 270 ℃ the surface will become burnt black color.
When the temperature over 270 ℃, pellets have large expansion rate, after cooling there will be many cracks on the surface of the pellets, but when the pellets＇temperature become lower and lower, the cracks will be smaller and smaller.

When rollers and die are correct adjusted, pellets are formed and come out smooth uniformly. If the raw material stucked in the machine, or comes steam, smock, or the pellets color is not good, like burnt black. Should turn off machines, and check: 1) if the raw material＇ｓ moisture is correct; 2) if the ring die＇s rate is correct; 3) if the gap between roller and ring die is too big or too small. If the machine is correct adjusted, user don’t need pay attention on the temperature, the friction will release a suitable temperature for pellets forming.

We offer guidance for pellet machine adjustment installation and training. After training if client still have question can also contact with us.