[Default] On Wed, 12 Jun 2013 12:53:02 +0700,Paul Olivier <[email protected]> wrote:
>How does lignin soften to become a binding agent using a meat grinder? >This would be truly wonderful, if it were true. It won't with a meat grinder, you will need some sort of binder, like boiled starch or clay. Lignin plastisises under high pressure and heat, the heat is normally derived from the friction of the material passing through the die. At these pressures the cell walls collapse and then the lignin re sets to form a pellet that is denser than the wood it was made from. All these systems use a lot of power and the expensive dies wear. The Shimada press is the one that produces a hexagonal log with a hole down the middle, often blackened on the outside from the heat from the press walls. Similarly rotary die extruders use pinch rollers to punch small amounts of feed through the holes. Have a look at: http://www.fao.org/docrep/x5738e/x5738e0j.htm AJH _______________________________________________ Stoves mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org for more Biomass Cooking Stoves, News and Information see our web site: http://stoves.bioenergylists.org/
