What is a Rotary Kiln?
You may have noticed that we’re well versed in the creation of rotary kiln seals. We’d also hate for you to lose sleep at night asking yourself, “What is a rotary kiln?” Here’s a little bit about what a rotary kiln is and the seals we make for them.
A rotary kiln is a pyro-processing device that raises materials to very high temperatures in a continuous process. It is used to create cement, lime, metakaolin, titanium dioxide, alumina, iron ore pellets, and more. On average, their thermal efficiency is between 50-65%, on average.
How Rotary Kilns Work
The kiln is typically in a cylindrical shape, which is then rotated around its axis (one end is usually slightly higher than the other). The material is entered into one side of the kiln (the higher end) and as the rotation occurs, the material slides down through the tube and goes through a certain amount of mixing and stirring. Hot gasses pass through the kiln, and these gases either come from an external furnace or may be generated inside the kiln.
Kilns are generally a counter flow process. Feed is dumped into the high end of the kiln and the heat source is entered into the other. Heat and feed is flowing in opposite directions within the kiln shell so that the feed is constantly increasing in temperature from start to finish. As the feed passes through the kiln, gasses and byproducts are generated which must be collected. This is where the seals come in by preventing outside air from entering the process, making the collection of gasses more difficult.
Ambient air will also reduce efficiency and create dangerous and unstable process conditions.
We’ve been making kiln seals for years, working closely with industrial customers both worldwide and locally in Western Pennsylvania. We’ll be glad to help you design custom solutions and provide you with effective, low-maintenance kiln seals, as well as with significant knowledge and expertise.What is a Rotary Kiln?