Maintenance of ring dies for biomass pellet mill

Ring die is the key part of biomass pellet mill in the large scale pellet plant. The quality of ring die plays an important role in making high quality pellets and high output. Thus, the ring die must have good mechanical properties and long service life. As the key component of biomass pellet mill, ring die has direct influence on the performance and quality of the pellets. Due to a high proportion of wear and tear in ring die, the replacement cost of ring die is relatively high. Therefore, it is of great help for you to learn more about how to repair and maintain the ring die correctly.

1. When the ring die for biomass pellet mill isn’t operate for a period of time, remaining feedstock in the holes should be extruded completely with non-corrosive oil feedstock. Otherwise, heat produced by ring die will dry and stiffen the feedstock which remains in the holes. Thus, the following situations come up.

a.When pellet mill is in operation, ring die holes are blocked and can’t compress the feedstock.

b.At the beginning of production, ring die is bearing high compress force with weakening strength that may give rise to the breakage of ring die. 

c.Some of the ring die holes are blocked and it causes production declines and low efficiency.

 

2. After ring die for pellet mill is operating for a period of time, it is necessary to check up the interior surface of ring die weather has part of local bulging or not. If it happens, the bulgy part should be worn off by glassing machine to ensure yield of ring die and long service life of compress roller.

3. If ring die holes stop discharging, ring die should be soaked with oil or boil with oil before making pellet again. If pellet mill still can’t work, the blocked holes should be clear up by electric drill and then oily materials mixed with silver sand should be grind and polish the ring die 

4. Don’t use hard steel tools like hammer to hit the surface of ring die when ring die is assembled or disassembled.

5. Service conditions of ring die for pellet mill should be recorded per shaft in order to estimate the exact service time of ring die.+

6. Ring dies for pellet mill should be kept in dry and clean places. If ring dies are kept in the damp places, holes of ring die are easy to corrode, thereby shortening the service time of ring die or stopping discharging.

Rational usage and essential maintenance of ring die in biomass pellet mill can ensure the low consumption, high production efficiency and good quality of pellets when producing pellets with biomass pellet mill.  As a leading pellet mill manufacturer in China, KMEC can provide you with the most professional biomass pellet mill and production advice according to your requirements, please feel free to contact us.

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