Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Patent
1993-02-02
1994-08-30
Group, Karl
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
106672, 106697, 106705, 106708, 106405, 106DIG1, 588256, 588257, C04B 1608
Patent
active
053424425
ABSTRACT:
A method is shown for producing a lightweight aggregate by treating flyash and sewage sludge. The flyash and sewage sludge are mixed together and then agglomerated into pellets, with or without the use of a binder. The pellets may be coated and then are dried. The dried pellets are introduced into a rotary kiln in a direction that is co-current with the flow of fuel and air through the kiln. The pellets in the kiln will be indurated and will experience complete calcination as well as varying degrees of pyrolizing and sintering. The product of the kiln is a nodular material having a low density but with a hard and porous structure. The product of the kiln is feed to a cooler. The flyash sewage sludge mixture has a significant fuel value that is usable in the kiln. Furthermore, the fuel value available in the kiln off-gases may be used for drying the materials.
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Title page and abstract, Coal Waste Artificial Reef Program, Phase 3, vol. 2: Comprehensive Report, Nov. 1981.
Grant Application of Greengrove Corporation to State of Wisconsin, Department of Natural Resources, Aug. 1991.
Heian Glenn A.
Nechvatal Timothy M.
Group Karl
Marcheschi Michael
Wisconsin Electric Power Company
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