Products from molten fly ash and scrubber sludge including fly ash

Patent · Tue May 08 04:00:00 EDT 1979

OSTI ID:5845561

Minnick, L J; Webster, W C; Smith, C L

The invention discloses methods of making finely divided products from fly ash compositions, including both dry fly ash compositions and aqueous suspensions of fly ash in combination with alkaline earth metal compounds. The fly ash composition, preferably including 10 to 50% combined alkaline earth metal oxides, is heated to molten condition while collecting gases evolving therefrom, including sulfur oxide gases. The top portion of the melt is then poured in a manner causing a molten stream thereof to be divided into a multiplicity of fractions and cooled to solid form while encompassed by a fluid cooling medium in a manner to produce either a shot or a granulated aggregate product. The bottom portion of the melt is nearly pure metallic iron which is recovered, as such, for other uses. Preferably, the molten stream impinges on a rotating member in a manner to produce shot, or is quenched in a water bath to form a granulated type product. 1 claim.

• Assignee: TIC; EDB-80-016778
• Patent Number(s): US 4153655
• OSTI ID: 5845561
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800 -- Coal
Lignite
& Peat-- Waste Management
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
AEROSOL WASTES
BUILDINGS
FLY ASH
MELTING
PHASE TRANSFORMATIONS
USES
WASTES