Method for forming coal briquettes
Method for forming coal briquettes from coal particles in the size range of 1/4 to 3/4 inch and containing fines in the range of 20 to 40% by volume. The coal particles and fines are mixed with sodium silicate and/or potassium silicate as a binder and are compacted into briquettes at a pressure of 100 to 200 psi, and particularly 140 psi. The resulting briquettes, which are particularly adapted for use as a fuel in home fireplaces, will burn without producing excessive smoke which normally results from burning coal. At the same time, the silicate acts to bond the ash produced during burning such that the burned briquette will maintain its integrity even after it has fully burned and may be removed from a fireplace grate in one piece rather than as loose ash. The briquettes are approximately the size of a wood log in order that they may be conveniently deposited in a fireplace grate.
- Assignee:
- TIC; EDB-80-032662; ERA-05-013028
- Patent Number(s):
- US 4169711
- OSTI ID:
- 5628972
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
ALKALI METAL COMPOUNDS
ASHES
BINDERS
BRIQUETS
BRIQUETTING
COAL FINES
COAL PREPARATION
COMMINUTION
COMPACTING
FABRICATION
FUELS
MOLDING
OXYGEN COMPOUNDS
POTASSIUM COMPOUNDS
POTASSIUM SILICATES
RESIDUES
SILICATES
SILICON COMPOUNDS
SINTERING
SODIUM COMPOUNDS
SODIUM SILICATES
SOLID FUELS