Minerals Processing

Vertical Roller Mills (VRM’s) for a wide range of applications with capabilities from as little as a few tonnes per hour up to 1500 tph.

Typical applications for the cement industry include GGBS (Slag), Cement Clinker, Limestone, Gypsum, etc.

For the mining industry utilising VRM dry grinding technology in the Iron Ore, Nickel Ore, Copper Ore and Manganese sectors to feed the flotation processing to produce separate concentrates for sale to downstream facilities.

The material to be ground is crushed between the rotating grinding track and the individually guided grinding rollers. Grinding is carried out primarily through the application of compressive force vertically, the secondary effect being the horizontal shear force, among others, a roller arm, along with a hydropneumatic tension system. After being rolled over by the rollers, the material is conveyed to a stationary nozzle ring due to the rotation of the grinding table. Gases (air or hot gas) flow through this nozzle ring, take up the ground and dried material and convey it to the classifier where it is separated by the rotating wheel (rotor) into grits and fines. The grits fall back into the grinding zone whereas the fines leave the classifier with the gas flow for being separated in cyclones or a filter.