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[[File:Calciner_Dryers.jpg|thumb|200px|right|Calciner Dryers]] | |||
The '''Calciner Dryers''' are for high temperature processing from 1000°-2100°F with controlled atmospheres utilizing heat sources of gas, oil, and electric. | |||
They are very similar in design to [[Rotary Dryers]], except that much higher temperatures are involved. Again these may be directly heated or indirectly, depending upon the specific application. | |||
==Directly Heated Calciners== | |||
The refractory lined rotating shell has no lifting flights. Forward flow of the material is effected by the slope and rotation of the shell. Located at the discharge end, a gas or oil burner enables temperatures up to 1650°C to be achieved. For certain applications, the atmosphere within the [[Kilns|kiln]] can be controlled to give oxidizing, or slightly reducing conditions. | |||
==Indirectly Heated Calciners== | |||
Based on the design of the indirectly heated rotary dryer, the calciner is capable of operating at temperatures of 1100°C. Typical applications include: | |||
* nickel catalysts | |||
* carbon regeneration | |||
* molecular sieves | |||
* china clay | |||
==Video== | |||
<youtube>2ai9CgvoTFQ</youtube> | |||