Capable of operation at temperatures up to 1202°F (650°C), Turbo-Dryer can be used to calcine or sinter fine metal oxide powders. The continuous tray dryer includes an internal electrical heating system that helps remove residual moisture. The dryer can use any heating medium: steam, gas, electricity, oil, high temperature oil or waste gas from other operations. Dry air or nitrogen is used to purge water vapor from the system, keeping fines carryover to a minimum. The proprietary design of the thermal processor consists of a stack of rotating circular trays in a sealed enclosure. Material is fed onto the top tray, and after each revolution it is wiped onto the next lower tray. Internal Turbo-Fans circulate heated gas in the enclosure to provide the drying medium.