Fuel pellets and method for making them from organic fibrous materials
First Claim
1. A process for making fuel pellets from organic fibrous material which comprises adjusting the moisture content of comminuted fibrous material to from 16 to about 28% by weight, compressing the material in a die into a substantially symmetrical shape while at the said moisture content at a pressure whereby the temperature of the resulting pellet as it emerges from the die is from about 325°
- to 350°
F. and drying the pellets to a moisture content which is approximately in equilibrium with the surrounding atmosphere.
3 Assignments
0 Petitions
Accused Products
Abstract
Pellets adapted to be burned in industrial applications are prepared by adjusting the particle size of organic fibrous material to not more than about 85% of the minimum dimension of the pellets to be produced, adjusting the moisture content of the fibrous particles to about 16% to about 28% by weight, pelletizing the particles into substantially symmetrical pellets having a maximum dimension of about one-half inch at a pressure whereby constituents of the particles exude and form a coating of wax-like material on the surface of the pellets, and adjusting the moisture of the pellets to a content which is in equilibrium with the atmosphere.
80 Citations
10 Claims
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1. A process for making fuel pellets from organic fibrous material which comprises adjusting the moisture content of comminuted fibrous material to from 16 to about 28% by weight, compressing the material in a die into a substantially symmetrical shape while at the said moisture content at a pressure whereby the temperature of the resulting pellet as it emerges from the die is from about 325°
- to 350°
F. and drying the pellets to a moisture content which is approximately in equilibrium with the surrounding atmosphere. - View Dependent Claims (2, 3, 6, 8)
- to 350°
-
4. An uninterrupted process for making fuel pellets which comprises conveying fragments of organic fibrous material to a means for comminuting the fragments to a maximum dimension of 85% of the minimum dimension of the pellets to be produced, adjusting the moisture content of the resulting particles to from about 20 to about 24% by weight, pelletizing the particles at a temperature of from about 325°
- to about 350°
F. to a density of above about 65 pounds per cubic foot, and adjusting the moisture content of the pellets to approximate equilibrium with the surrounding atmosphere. - View Dependent Claims (9, 10)
- to about 350°
- 5. A combustible organic fibrous pellet having a substantially symmetrical configuration with a maximum dimension in cross-section of not more than about one-half inch, a density above about 65 pounds per cubic foot and a substantially smooth protective surface coating of natural substances which have exuded from the organic fibrous material adapted to burn substantially uniformly and develop a BTU of from about 8,500 - 9,000 per pound.
Specification