SPP use a rotary dryer to dry crushed oil shale particles. The orange surface in the animation shows the shape of the gas flame in the combustor section of the dryer. The blue and green surfaces show how cooling air mixes in the combustor. Later in the animation particle tracks show larger shale particles falling from lifters in the dryer with their color indicating their temperature.
If the animation does not load or is of poor quality, try running this compiled Smacker file: b4.exe (817kB).
Note that this is an executable file, and should be suitable for all PCs running Win95 or later. For more information about Smacker and its compiled executables, please follow this link.