Thermal process of powders (including calcination, sintering, carburization, etc.) is dominantly performed, due to its inherent characteristics, in rotary tube furnace. Rotary furnaces are known to be the preferred processing unit for flowable powdered or granular materials. The rotary tube furnace, under the proper conditions, will be significantly more energy efficient than the pusher tunnel furnace. The energy requirement of heating the rigid furniture of the pusher tunnel furnace is replaced by the stationary but rotating tube of the rotary, which sets the rotary apart with significant lower total energy consumption.
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