Heating – Processes of heating or heater operation – Including passing – treating or conveying gas into or through...
Patent
1991-01-11
1991-10-15
Yuen, Henry C.
Heating
Processes of heating or heater operation
Including passing, treating or conveying gas into or through...
110347, 110165A, 110246, F27B 1500, F23G 500
Patent
active
050570099
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 witll 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 & abstract, Coal Waste Artificial Reef Program, Phase 3, vol. 2: Comprehensive Report, Nov. 1981.
Heian Glenn A.
Nechvatal Timothy M.
Wisconsin Electric Power Company
Yuen Henry C.
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