How to deal with the powdery material compressed by the pellet machine?

There are three reasons for the powdery material or basically no pellets but all powdery material in the pellet when compressed by the pellet machine. They are compression ratio of mold, moisture content of material and the machine testing.

Moisture content of raw material
Moisture content is considered to be an important factor to ensure pelletizing efficiency. According to experts, it's important to control moisture content before feeding raw material to the hopper. In addition to this, moisture content should be uniform for the material.

Too large or too small of moisture content of raw material can cause the powdery situation. The pellet can not be formed with big size powdery material if moisture content is large. The pellet has much small fines if the moisture content is small. The most proper moisture content for compressing of pellet machine is about 15%. The specific moisture requirement should be on the basis of feedstock.



The compression ratio of the die
Compression ratio refers to the actual diameter or lengths of ring die holes. In theory, when the compression ratio is larger, the output of the pellet machine is better. One drawback of compression ratio is that the discharging speed may be low and the holes may be easily blocked.

If the compression ration of the mold is improper, the machine can not give enough pressure to the straw material and time for formation. It leads to the material flowing out from the machine without compressing which causes the powdery of pellet.

As for the above reasons, the method for solving is simple.
1.Take good control of moisture content of material. Add a drying process when the material has high moisture content.
2.The compression ratio of die can not be changed. The simple way is to change the die. Several types of die are suggested for testing for finding the best proper one.
3.Installment and testing of pellet mill. It is necessary to install and test the machine by the manufacture with active cooperation with the producer. 
KMEC of He Nan province are professional manufactures of pellet machine, wood pellet mill, straw pellet mill, sawdust crushing machine and other biomass new energy equipment. Our products have been exported to foreign countries which have been approved by our clients. Welcome to investigate our company.

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