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The die in the pellet mill is the most important component of the process. The die effects pellet quality, productivity, energy consumption, manufacture efficiency along with reliability.

The die is what forms the raw material into the pellet shape. The die contains a series of holes across its surface. As the material enters the pellet mill, it is compressed between the die surface plus roller, with some material being compressed because of the holes. The action of compression between roller as well as die, generates heat along with pressure. These two forces are essential in the pellet formation process.

The size as well as diameter of the holes in the die vary on the market for the pellets. For example pellet stoves generally call for a pellet by way of a diameter of 6mm, where pellet boilers can mostly handle 8mm in diameter, in addition to in some cases even larger. Up to a certain point the diameter would change the description from a pellet to a briquette.

It is harder yet to design hopper plus auger feed systems for briquettes. There is a lot more information on pellet mill dies within the guide, covering the materials used to make them, surface finish, hole relief along with counter relief plus a mixture of other information along with facts. See below for more information.

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There are two key types of pellet mill, the ring die plus flat die pellet mill. The ring die pellet mill is a second generation design of pellet mill. Ring die pellet mills have been widely adopted in large scale animal feed plus wood pellet production. As the name suggests a ring die pellet mill has a ring produced die. The die is driven as well as sits in a perpendicular position.

The rollers provide force to the inner side of the die, compressing material and pellets to the outer edge of the ring. There are quite a few reward as well as disadvantages of ring die pellet mills over the flat die design, which are discussed in guide.

Read more about Pellet Making

The flat die pellet mill was the first design to be used. Originally used for animal feed construction, plus later adapted to process other raw materials including wood pellets. Flat die pellet mills are a much simpler design than ring die pellet mills, along with are in style as small scale pellet mills.

In a flat die pellet mill the die is in a horizontal position, by a set of rollers providing upright pressure, down onto the surface of the die. Depending on the design of the pellet mill, the die its self will be rotating or the roller carriage over the surface of a fixed die. Die and roller changes in flat die pellet mills are very simple.

At PelHeat we develop small mobile pellet mill solutions. We have developed this guide to provide more detail on the pellet production process for individuals along with organizations interested in both small as well as large scale construction. The guide contains information on the whole process from raw material reduction, to final processing, including detailed information on the pellet mill die.

For more information on How to make wood pellets

Today the reward of material densification are becoming more well known. By means of increasing the bulk density of raw materials by using a pellet mill has a mixture of positive aspects. Firstly the reduced size means it is more efficient plus cheaper to shipping pellets instead of the raw material. In terms of fuel pellets plus combustion, the advantages combustion a material by a high density are increased burning efficiency. The most common use of a pellet mill to manufacture pellets today in addition to for the past century have been to make animal feed pellets. The pellet manufacture process allows the manufacturer to produce exact blends of feed and vitamins and then process the feed mixture in the pellet mill to produce feed pellets specifically for certain animals. Within the last few decades, pellet mills have also being used to make biomass pellets. Biomass pellets can be used for energy, yet there are other uses such as animal bedding. As biomass has a higher density than animal feed ingredients, biomass pellet mills are unlike than feed pellet mills. The Biomass Pellet Construction Guide provides details on these differences along with compensation as well as disadvantages.

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Recently there has been a rising interest in using the pellet mill to create other wood pellets, for case for fuel pellets. Wood simply refers to any cellulose organic matter than can be used to produce fuel. This obviously includes biomass, yet other materials such as straw and grasses, miscanthus, reed canary grass, switchgrass in addition to hemp to name but a few. By using a pellet mill to upgrade these raw materials into fuel pellets, these fuels will play an important role in our fuel future. Pellet mills are also often referred to as a pellet press for obvious reasons. Pellet presses do press the raw materials into a pellet shape. Using a pellet mill along with pellet construction process to turn dissimilar raw materials into pellets can give value along with provide a use to many materials which today are regarded as waste.

Read more about Pellet Making

There is a range of other pieces of equipment other than the pellet mill that is required in pellet construction. The Biomass Pellet Construction Guide provides detail on the potential equipment options in addition to why they are required. Pellet manufacture is a combination of the correct equipment, process set-up along with operator knowledge in addition to skill. The Wood Pellet Manufacture Guide provides a concise, easy to understand guide to the principles of the process along with the factors that need to be restricted in addition to adjusted to produce quality pellets.

For more information on Pellet Making