What Pellet Binder Is Used For Fuel Pellets?
Pellet production characteristics change depending on the raw material being processed and the equipment used. Many raw materials contain sufficient natural binding properties through their lignin content. Lignin is is the natural carbohydrate, which gives biomass its strength. Some biomass materials have more lignin that others, for example wood compared to grass. However depending on the density of the raw material, and 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 in the pellet mill.
Low Inclusions Binders To Make Pellets
Water and vegetable oil, among other oily waste biomass can be used as binders, however their inclusion rate has to be quite high, for example up to 30%. They also generally do not produce a pellet of sufficient density and durability, low inclusion industry standard pellet binders are more suitable. Industry standard low inclusion binders usually require only a 0.25-1% inclusion rate. The best binder to produce fuel pellets is modified corn starch. Other available binders which are used in the feed industry can effect the combustion results of the pellets and therefore they should not really be used for fuel pellet production.
Making Wood Pellets With Pellet Binder
Wood pellet production compared to grass pellet production for example is a far more energy intensive process. The wood generates increased resistance as it passes through the die due to its increased density. Therefore industry standard binders can also be used to lubricate the die during wood pellet production. Lubricating the die has multiple benefits in the pellet mill. Lubrication can increase productivity, reduce wear on disposable parts and increase wood pellet quality.
Pellet Mill Benefits With Pellet Binders
Using low inclusion binders to also lubricate the pellet mill die during production has multiple benefits. One of the advantages is increased productivity through reduced resistance through the die. Even though resistance is related to compression, pellet quality can still be maintained through the additional binding properties of the binder. The lubrication can also increase die and roller life within the pellet mill. The reduced resistance also reduces energy consumption during production. With an increased productivity, reduced energy demand and increased life of consumable parts the additional cost of the binder is easily recovered. Please click below to watch videos on our pellet press products and automated pellet plants which are all UK manufactured.