Hengyang Industrial has been a leading resource for the rotary kiln
and rotary dryer industries for many years. From models as small as
2-foot diameters to massive tubes with 60-ton wall sections, we are
a one-stop shop capable of fabricating kilns and dryers of all
sizes, as well as providing repairs and replacement parts for
existing systems.
Though rotary kilns and dryers perform different thermal processing
functions for diverse applications, both are required to operate
under rigorous conditions; we understand the level of precision
necessary to create a product able to withstand these trying
environments.
Rotary Kilns
Rotary kilns are large rotating steel tubes that cause chemical
reactions by heating up solids as the material passes through them.
Typically, they can withstand much higher temperature ranges than
rotary dryers, operating between 1,000 degrees Fahrenheit and 3,000
degrees Fahrenheit. Using counter-current flows, rotary kilns dry
solids such as lime slurry for the paper industry.
Rotary kilns come in two different types:
- Direct fired rotary kilns — Consist of a steel shell lined with a protective brick or castable
lining to withstand extreme temperatures.
- Indirect rotary kilns — Unlined kilns with shells made from a temperature-resistant alloy
rather than steel.
Rotary Dryers
Rotary dryers, on the other hand, dry products by drawing moisture
out of them, as their name suggests. However, rotary dryers can
only handle temperatures ranging from 800 degrees Fahrenheit to
1,400 degrees Fahrenheit because, like indirect kilns, they lack a
protective refractory liner. To compensate for this difference, a
rotary dryer’s shell drum must be cast from temperature-resistant
alloy instead of steel.
Rotary dryers also come in two variations:
- Direct rotary dryers — Lift and douse the product with hot air through a parallel or
counter-flow hot gas stream.
- Indirect rotary dryers — Heat the product from the outside, resulting in minimal contact
between the product and the actual drying gasses. This method is
more suitable for dusty or very fine materials.
Superior Quality Parts from Hengyang Industrial
At Hengyang Industrial, we have experience fabricating and
machining a wide range of rotary kilns and dryers, from complete
units of all different sizes to repair sections and two-piece
replacement tires. We understand the rigorous environments that
rotary kilns and dryers face every day and, as such, we leverage
our extensive custom fabrication experience to make kiln and dryer
sections to exact tolerances.
Because we can control all aspects of the process — fabricating,
cutting, roll forming, welding, and machining — in-house at our Elk
Grove, IL, facility, we are able to supply superior quality parts
for new rotary kiln and dryer installations as well as repair
sections, ensuring that our customers always receive the best
product, at the best price, with on-time delivery.
Learn More about Hengyang Industrial
With over 30 years of experience in custom metal fabrication,
Hengyang Industrial has the training and expertise necessary to
meet all of your rotary kiln and dryer needs.
