A rotary kiln can operate at temperatures ranging from 800 to 2,200°F (430-1,200°C).
Specific applications may require different temperature ranges.
Direct rotary kilns, known for their efficiency due to direct heat transfer, can process materials at temperatures between 800 and 2,372°F (430-1,300°C).
The temperature range in rotary kilns is determined by the specific process being carried out.
For example, drying of LiB cathode material requires temperatures up to 200°C.
Firing of tungsten powder or catalyst/ceramic firing may need temperatures up to 1000°C.
For processes requiring even higher temperatures, such as those up to 2500°C, specialized heating systems like carbon heater kilns are used.
The efficiency of heat transfer in direct rotary kilns is enhanced by the design of the drum.
This design may include refractory lining and lifting or tumbling flights to improve bed turnover.
These features create a showering effect of the material through the process gas.
This design helps in uniformly heating the materials, which is crucial for various thermal processes like calcination, incineration, and thermal desorption.
In summary, the temperature in a rotary kiln can vary significantly depending on the specific application and the type of rotary kiln used.
Direct rotary kilns offer a wider temperature range and better heat transfer efficiency, making them suitable for a variety of high-temperature processes.
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