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Wood is a general term used to explain any organic material which can be used as a energy. For instance wood, wood waste, energy crops and farming waste such as straw. A biomass pellet mill has variable features that make it feasible to process a variety of biomass resources. For case in point the pellet mill be obliged to have ample power to treat woody biomass, and in addition the ability to control features such as die velocity. At PelHeat we develop small mobile wood pellet mills to treat a wide range of biomass materials. The uses for these pellets could be as energy, animal feed, animal bedding and still cooking pellets. A wood pellet mill is a all-purpose term to portray a pellet mill, however some pellet mills have particular features for processing certain materials.

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Grass pellet mills are used chiefly in the animal feed industry. Grass pellet mills usually have a higher die speed than wood pellet mills for instance. Also power consumption is much lower, due to the reduced resistance of the grass. One of the key differences with wood pellet mills is the differentiation in die rotation speed. Wood has a greatly higher density than grass for example, and so is further difficult to deal with into pellets. More electricity is required to process wood into pellets, as a result traditionally a lower gearing is required to condense the wood through the die. Also to gelatinise wood into pellets, higher construction temperatures are essential. Raw substance temperature can be enlarged by processing the raw material through a steam conditioner. Though another way to amplify pellet quality is to increase resonance time through the die, hence a lower die rotation speed. Manufacture pellets is a process that relies on quite a few factors with regards to the raw material and the apparatus used.

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The raw material must have a steady moisture content, generally within the reach of 15%. The material must also be free from contaminates such as stones and metal, as these can cause severe damage to the equipment. Pellet making apparatus requires a high energy input, usually requiring a three phase electrical supply. The core piece of gear is obviously the pellet mill. Correct operation and maintenance of the pellet mill is the key factors in producing quality pellets proficiently. As stated there are quite a lot of variables which need to be controlled to produce quality biomass pellets. Each raw matter behaves differently in the pellet mill, and only by comprehension the results can the process be adjusted to produce suitable quality pellets. However many people interested in how pellets are made, and possibly building their own set-up are not familiar with the details of the process.

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