- Bottom ash
- Residue mainly from the coal burning process that falls to the bottom of the boiler for removal and disposal.U.S. Dept. of Energy, Energy Information Administration's Energy Glossary
Energy terms . 2014.
Bottom ash
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ash dump — noun Etymology: ash (III) : an opening in the bottom of a fireplace or furnace leading to an ashpit below … Useful english dictionary
Fly ash — Photomicrograph made with a Scanning Electron Microscope (SEM): Fly ash particles at 2,000x magnification Fly ash is one of the residues generated in combustion, and comprises the fine particles that rise with the flue gases. Ash which does not… … Wikipedia
