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Pellet manufacture characteristics change depending on the raw material being processed, and the equipment used. Many raw materials contain enough unrefined binding properties because of their lignin content. Lignin is is the organic carbohydrate, which gives biomass its strength.

Some biomass materials have more lignin that others, for case biomass compared to grass. On the other hand depending on the density of the raw material, along with the type of equipment used, influences if the lignin can be properly utilized to form pellets. Where there isn’t adequate lignin, or the lignin cannot be utilized, supplementary binders can be used. Water and vegetable oil, among other oily waste wood can be used as binders, on the other hand their inclusion rate has to be quite high, for case up to 30%.

They also generally do not produce a pellet of ample density along with durability, low inclusion industry standard pellet binders are more suitable. Industry standard low inclusion binders usually need only a 0.25-1% inclusion rate. Wood pellet production compared to grass pellet manufacture for example, is a far more fuel intensive process. The biomass generates increased resistance as it passes due to the die, through its increased density.

Therefore industry standard binders can also be used to lubricate the die during wood pellet construction. Lubricating the die has multiple benefits in the pellet mill. Lubrication can increase productivity, reduce wear on disposable parts in addition to enlarge wood pellet quality.

Learn more about Pellet Die

Using low inclusion binders to also lubricate the pellet mill die during manufacture has multiple benefits. One of the advantages is increased productivity owing to reduced resistance because of the die. Even yet resistance is related to compression, pellet quality can still be maintained due to the additional binding properties of the binder. The lubrication can also amplify die in addition to roller life within the pellet mill. Also the reduced resistance also reduces fuel consumption during production. By way of an increased productivity plus reduced fuel demand and increased life of consumable parts, the additional charge of the binder is easily recovered.

Read more about Straw Pellets

As stated many raw materials do have adequate natural lignin to act as a pellet binder, however releasing that potential in a small pellet mill can be difficult. Utilizing lignin as a binder relies on sufficient heat along with pressure generated in the process. This may not be an issue in the small pellet mill when processing grass, as it much easier to heat the lignin to the required temperature as most grass has a low density. Generating pellets from wood though can be much more difficult, as well as therefore requires a binder.

For more information on Small Pellet Mills

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