Raymond® Mechanical Air Separator
Produce Materials with High Uniform Fineness
The Raymond® Mechanical Air Separator produces material with high uniform fineness; operates in open or closed circuit; is excellent for de-dusting; can provide drying and cooling; and features the unique single or double whizzer for faster separation of fines and more positive rejection of oversize.
Single Whizzer Air Separators
Single whizzer separators have only one bank of whizzer blades to set up centrifugal action. This unit is ordinarily used for coarser separations up to approximately 10-15% R74 microns (85 to 90% passing 200 mesh) which is excellent for de-dusting and raw mix cement operations.
Double Whizzer Air Separators
Double whizzer units have two rows or banks of whizzer blades. In normal operations they can produce finished materials up to 0.5-1% R44 microns (99 to 99.5% passing 325 mesh) and in finished cement circuits 2800 to 6000 Blaine or masonry cements.
Closed Circuit Grinding
When operated in closed circuit combination with a pulverizer, the separator skims off the fines as fast as they are made so the mill works only on fresh material without wasting power. The tailings are discharged back to the mill for further reduction. The reground material is returned to the separator with the feed, so that a constant circulating load is set up between the mill and the separator.
The separator may be used in combination with ball mills, tube mills and compartment mills. Its function is to maintain a constant fineness in delivering the finished product.
In some cases, it is convenient to install the separator independently from the mill to make both a fine and coarse product simultaneously.