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The composition of pellets

Post in 'The Pellet Mill - Pellet and Multifuel Stoves' started by ducker, Jun 25, 2008.

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  1. ducker

    ducker Feeling the Heat

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    Do Pellet mills ever put additives in pellets? Maybe some type of adhesive to help them keep their shape? or to help in increasing the BTU output?

    From what I've read on the pellet wiki page it sounds as if all a pellet is (typically) is just wood fiber. that's it.

    I guess I'm a little concerned about the cheaper brand of pellet I bought.

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  2. BubbRubb

    BubbRubb New Member

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    I've never heard of adhesive being used to hold a pellet together. Cheaper pellets often equate to more ash which equates to more frequent cleanings which equates to less free time to plow snow which equates to unhappy wife
  3. ducker

    ducker Feeling the Heat

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    yea but in terms of any type of toxic fumes (aside from your standard CO2) with burning a cheaper pellet vs. a more expensive one.

    I'm not really that concerned, since everything I read states it's all wood; but wife + new toddler = question everything :)
  4. Eric Johnson

    Eric Johnson Mod Emeritus

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    There's nothing in pellets but wood residue and maybe a little paper or corn. Harmless to the toddler unless he chokes on them (heaven forbid).
  5. Wet1

    Wet1 Minister of Fire

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    Some will have a small quantity of oil (such as soybean oil) included as well, which can increase the the efficiency of the manufacturing process.
  6. mjbrown

    mjbrown Feeling the Heat

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    i believe(though not sure , so dont quote me) that the process for making the pellets is putting them thru a 100 ton press.with 100 ton of pressure, they should be able to hold their shape without glues or additives.from what i read on the bio-brick when i considered those, it was all very high pressure.


    mike
  7. JustWood

    JustWood Minister of Fire

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    You're right. Along with the pressure is heat and natural resins which helps to bind them together.
  8. jawquin

    jawquin Member

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    lignin


    The press compresses the wood pellets through a die, which is designed with an appropriately sized hole, usually as small as 6 mm in diameter. The extreme pressure of the press compresses the wood and causes the temperature of the wood to rise very much as well. This temperature rise causes the lignin of the wood to form a sort of natural glue which holds the pellets together as the wood cools again.
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