The ufg-mill is an effective method of ultra fine grinding many soft to medium hard materials in the range of 1 to 50 microns. The ufg-mill is a dry, vertical, airswept agitated media mill. The grinding action takes place on the surface of grinding media which is agitated by a variable speed rotating central stirrer.

Feed materials, which can be as large as 3mm, are fed pneumatically into the mill through a hollow central shaft. The particles pass through the agitated media bed and exit the mill into an air classifier. On size particles are collected in a filter and oversize particles are returned to the mill for further grinding