Rotary kilns are used to heat solid materials to a temperature high enough to induce a chemical reaction. A rotary cement kiln, refractory rotary kiln and rotary alumina kiln are common examples of the equipment. Other applications include waste lime recovery, thermal desorption of organic and hazardous wastes, mineral roasting, specialty ceramics, plastic processing, gypsum calcining, tire pyrolysis, bauxite calcining and phosphate productions.
Rotary kilns are cylindrical and rotate on an axis. They are slightly inclined and the material moves toward the lower end of the kiln as it is rotated. Hot gases move either with the material, or more commonly, against it. The gases are generated by an external furnace or a flame within the kiln. Rotary kilns use a refractory lining to protect the kiln shells from the extreme temperatures. When purchasing a rotary kiln, consider the following:
1. Use rotary kilns that are designed specifically for the material you're processing.
2. Purchase custom rotary kilns for a design based on your specifications.
3. Lower rotary kiln prices with used kilns and replacement parts.
Find application-specific rotary kiln designPurchasing a rotary kiln designed specifically for your application ensures your equipment functions properly and efficiently. Materials need to be retained in the kiln for various amounts of time. The kiln's diameter, length, speed, slope and internals design determines the solids-retention time.
Order from custom rotary kiln manufacturersCustom rotary kiln manufacturers design and fabricate rotary equipment based on your specifications. When ordering a custom rotary kiln, consider the kiln's size, material and heat ability required for your application.
Reduce rotary kiln prices with used equipment and replacement partsOrdering used rotary kilns decreases your equipment cost. Used replacement parts are also a cost-effective way to maintain your rotary kiln. Good parts are often stripped from defective kilns and sold at a discount. Keeping common replacement parts in-house reduces down time during maintenance.
- When purchasing rotary kilns, you must also buy material exit hoods, which connect to the lower end of the kiln. The material exit hood collects waste gases, which can then enter a pre-heater to exchange heat with the entering feed.