×

Coal briquette and method

  • US 4,478,601 A
  • Filed: 01/06/1983
  • Issued: 10/23/1984
  • Est. Priority Date: 01/30/1981
  • Status: Expired due to Fees
First Claim
Patent Images

1. A combustible fuel block comprising:

  • (a) a major amount in excess of about 60% by weight of a water-wetted particulate hydrocarbon fuel;

    (b) said fuel characterized by BTU content of in excess of about 104 BTU/lb. and about 1.0×

    106 BTU/cu.ft.;

    (c) said particulates not appreciably larger than about one inch, but principally retained on a 100 mesh screen;

    (d) interstitially dispersed among said fuel particulates a minor amount of a small but effective quantity of slacked or burned lime and a relatively larger amount but less than about 25% by weight of macro clumps of capillary spaced apart combustible natural and/or synthetic fibers;

    (e) said packed clumps of fibers wetted by and holding by inherent capillary voids;

    (f) a quantity, but less than 25% by weight, of said particulate fuel of a fluent hydrocarbon distillate having a flash point above about 80°

    F.;

    (g) an amount, but not essentially more than about 5% by weight, of said fuel particulates of a water soluble alkyl cellulose to provide a viscous adhesive binder phase for said water-wetted fuel particulates;

    (h) said admixed mass compressed under pressures sufficient to compress and extrude said admixture into a self-supporting geometric form having;

    (i) at least one air passageway longitudinally through said block;

    (j) the interior surface of said air passageways having a ratio of unit area thereof to the total fuel block unit volume not greater than about 1;

    1 and a mean-free burning time period in excess of five hours;

    (k) the exterior surfaces of said geometric form substantially overcoated with a combustible coating having a melting point above about 100°

    F., but less than about 225°

    F.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×