| 摘要 |
A roller hearth calcining furnace that uses a movable fluid bed that is transported through plural heating modules, each heating module independently heated usi ng 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 oxidiz er can be fired with oil, coal, natural gas or other means, is impervious to attack from dir ty 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 thu s different temperature zones within a furnace as required by the temperature profile of the material being calcined.
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