Method and apparatus for producing expanded clay and expanded sh

Details Method and apparatus for producing expanded clay and expanded sh Method and apparatus for producing expanded clay and expanded sh

1983-07-19

1985-01-22

Camby, John J.

Heating

Processes of heating or heater operation

Including melting, vaporizing, sintering, expanding...

432105, 432106, 432118, F27B 1400, F27B 736, F27B 702, F27B 714

Patent

active

044949286

ABSTRACT:
A method and apparatus for producing expanded clay or expanded shale finished product in a straight-line continuous rotary tube kiln provided with charging and discharge ends at respectively opposite ends of the kiln, the kiln being divided into a preheating zone and an expansion zone following one another in the direction from the charging end to the discharge end, the preheating zone being more proximate to the charging end and the expansion zone being more proximate to the discharge end, a stationary burner disposed in the vicinity of the discharge end and a mantle burner which rotates together with the kiln and which is located to heat the preheating zone. The method includes introducing raw product at the charging end, heating the preheating zone with the mantle burner, passing the raw product from the charging end through the preheating zone heated by the mantle burner so as to dry and heat the raw product, passing the raw product to the expansion zone, and expanding the raw product in the expansion zone under the influence of heat from the stationary burner to create the finished product, wherein the improvement comprises thoroughly mixing the raw product in a region between the mantle burner and the charging end, to creating conditions to assure more complete fuel combustion of fuel at the mantle burner.

REFERENCES:
patent: 2430601 (1947-11-01), Cleary
patent: 4342554 (1982-08-01), Rohrbach

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