697
edits
Line 9: | Line 9: | ||
[[File:Calciner_Dryers.jpg|thumb|200px|right|Calciner Dryers]] | [[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. | 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. | 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''' === | ==='''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 kiln can be controlled to give oxidising, or slightly reducing conditions. | 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 kiln can be controlled to give oxidising, or slightly reducing conditions. | ||
==='''Indirectly Heated Calciners'''=== | ==='''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 and china clay. | 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 and china clay. | ||
=='''Video'''== | =='''Video'''== | ||
<youtube>2ai9CgvoTFQ</youtube> | <youtube>2ai9CgvoTFQ</youtube> |