Pellet production characteristics change depending on the raw material being processed, along with the equipment used. Many raw materials contain ample unrefined binding properties due to their lignin content. Lignin is is the unrefined carbohydrate, which gives wood its strength.
Some biomass materials have more lignin that others, for case in point biomass compared to grass. On the other hand depending on the density of the raw matter, as well as the type of equipment used, influences if the lignin can be properly utilized to form pellets. Where there isn’t sufficient lignin, or the lignin cannot be utilized, supplementary binders can be used. Water and vegetable oil, among other oily waste biomass can be used as binders, on the other hand their inclusion rate has to be quite high, for case in point up to 30%.
They also generally do not make a pellet of adequate density plus durability, low inclusion industry standard pellet binders are more suitable. Industry standard low inclusion binders usually require only a 0.25-1% inclusion rate. Biomass pellet production compared to grass pellet production for example, is a far more fuel intensive process. The biomass generates increased resistance as it passes due to the die, owing to its increased density.
Therefore industry standard binders can also be used to lubricate the die during biomass pellet production. Lubricating the die has multiple payback in the pellet mill. Lubrication can amplify productivity, decrease wear on disposable parts and raise biomass pellet quality.
Learn more about Pellet Mill Die
Using low inclusion binders to also lubricate the pellet mill die during production has multiple payback. One of the advantages is increased productivity due to reduced resistance due to the die. Even on the other hand 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 and roller life within the pellet mill. Also the reduced resistance also reduces energy consumption during construction. By an increased productivity in addition to reduced energy demand and increased life of consumable parts, the additional cost of the binder is easily recovered.
Read more about Straw Pellet
As stated many raw materials do have adequate organic lignin to act as a pellet binder, on the other hand releasing that likely in a small pellet mill can be difficult. Utilizing lignin as a binder relies on enough 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. Producing pellets from biomass yet can be much more difficult, along with therefore requires a binder.
For more information on Small Pellet Mill
