Method for forming coal briquettes
US4169711A · kind A · utility
Inventor
Key dates
| Filing date | Apr 3, 1978 |
| Grant date | Oct 2, 1979 |
| Priority date | — |
| Expiry date | Apr 3, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L5/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
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 20-40% 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 100-200 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.