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US 2018/0044193 A1Published application
Process to Recycle and Reuse Trona and Coal Combustion Byproducts in a Coal-Fired Power Plant
AssigneeAsh Recovery Systems, Inc.
InventorRobert L. Smith
Life of this patent
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Abstract
A process is developed wherein sodium carbonate is reclaimed from Trona-treated fly ash waste stream, and the fly ash rendered suitable for use as a Pozzolan. The process is a closed system wherein all separated aspects of the waste stream are reused by the generating power plant or offered as a commercial product.
Claims3
A process whereby Trona-treated fly ash is beneficiated by water washing
- 1.a) results in the removal of Cenospheres by flotation separation
- 1.b) results in the removal of iron-laden particles by wet magnetic separation
- 1.c) results in the removal of carbon-laden particles by froth flotation
A process whereby Trona-treated fly ash is beneficiated by the removal of sodium contaminants
- 2.a) results in the removal of arsenic and selenium by use of reducing or oxidizing agents
- 2.b) results in the precipitation of sulfates and sulfites by addition of calcium chloride
- 2.c) salt brine after precipitation is useable as ice control media
A process whereby Trona, represented as sodium carbonates, is reclaimed from Trona-treated fly ash
- 3.a) results in capture of sodium carbonate through Solvay process.
Dependencies are inferred from the claim text.