The ANR is designed for the cost-efficient ultrafine grinding of highly concentrated limestone slurries. The operating mode and the design permit the production of extremely high qualities with regard to fineness, degree of whiteness and abrasiveness. The mill design ensures low-maintenance continuous system operation with no expensive downtime periods. The flow pattern through the vertically configured ANR is from bottom to top, whereby the feed material is ground to the required end fineness with the aid of ceramic grinding beads (zirconium silicate or zirconium oxide).

The grinding beads are separated from the discharging suspension by means of a low-maintenance combination of mechanical and dynamic separating element at the mill head. The low-speed agitator ensures an exceedingly low-energy grinding process at low wear rates and high mill service life. The agitator elements and the grinding chamber wall are made of wear-resistant hardened materials. An efficient cooling of the mill stator removes the heat generated during grinding. The geometry of the mill permits trouble-free scale-up to high production-scale capacities. The product line includes small pilot machines of 45 kW as well as production-scale mills up to the MW range.