Roller hearth calcining furnace and method of use

Details Roller hearth calcining furnace and method of use Roller hearth calcining furnace and method of use

F - Mech Eng,Light,Heat,Weapons

27

B

F27B 15/02 (2006.01) C04B 7/40 (2006.01) F27B 9/24 (2006.01) F27B 15/04 (2006.01) F27B 15/10 (2006.01)

Patent

CA 2636335

A roller hearth calcining furnace that uses a movable fluid bed that is transported through plural heating modules, each heating module independently heated using an indirect heating system. The indirect heating system includes an oxidizer, an all- ceramic, indirect, air-to-air heat exchanger, and one or more metal heat exchangers. The oxidizer can be fired with oil, coal, natural gas or other means, is impervious to attack from dirty fuels, and produces clean hot air for productive use. The movable fluid bed includes a permeable silicon carbide ceramic plate that resides within, and is supported by, a sagger or tray. The sagger is transported on rollers through the plural heating modules, and thus different temperature zones within a furnace as required by the temperature profile of the material being calcined.

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