As we all know, pellet mills are divided into two series - flat die series and ring die series. You should be familiar with the ring die series, because many feed companies at home and abroad use ring die machines for granulation. The raw materials for feed are all concentrated materials, such as corn, soybean meal, cotton meal, etc., with high adhesion rate. In addition, a steam conditioner is equipped before pelleting, which can soften and ripen the materials in advance, so as to better Granulation, but also increased the gloss of the granules. However, crude fibers such as straw and wood chips have low bonding rate and are difficult to form. If they are used as fuel particles, they require a large density, so a lot of pressure is required to achieve the density of the particles, which increases invisibly. difficulty. Due to the gradual rise of renewable energy in recent years, the ring-die granulator for fuel pellets popularized in the market is evolved from the ring-die machine for feed, so there are still many drawbacks to be improved.
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