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Method of making pelletized fuel

  • US 5,342,418 A
  • Filed: 02/22/1993
  • Issued: 08/30/1994
  • Est. Priority Date: 04/25/1990
  • Status: Expired due to Term
First Claim
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1. A method of making pelletized fuel in the form of elongated pellets having an axial length,said method comprising the steps of:

  • (a) selecting as elements of said pelletized fuel to make the composition thereof,(i) about 60% to about 90% by weight, on a dry basis, of a cellulosic fiber element, said cellulosic fiber element comprising at least about 10% by weight, on an overall basis, of a first cellulosic fiber component having a first density, and no more than about 90% by weight of a second cellulosic fiber component having a second density greater than said first density, and(ii) about 10% to 40% by weight, on a dry basis, of a thermoplastic resin element,said composition of said fuel comprising less than about 15% by weight water on an overall basis;

    (b) feeding said elements through size reducing apparatus adapted to reduce the size thereof to length and width dimensions of about 0.2 times to about 8 times the cross section of the fuel pellets to be made therefrom; and

    (c) feeding said size-reduced elements through a pellet mill, including forcing said elements through die holes in a pelletizing die, to form pellets of said fuel, said pellets comprising bonded layers of said elements disposed transverse to the axial lengths of said pellets, said transverse layers extending across an entire transverse dimension of said pellets and with said layers randomly enfolded with and overlapping each other.

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