Polysius Ag

Thyssenkrupp Industrial Solutions Ag

Egbert Burchardt

Norbert Patzelt

Franz-Josef Zurhove

Ludwig Könning

Johann Knecht

Olaf Hagemeier

René Klymowsky

Rene Klymowsky

Heinz Schroeder

Disclosed herein is a method and system for grinding fragmentary starting material, in particular ores, with a dry grinding system. An embodiment of the method includes the steps of determining the moisture of starting material for a certain period of time, preparing at least one screening stage, the cut point of which is selected depending on the determined moisture in such a manner that the moisture of a screen oversize does not exceed a predetermined moisture limit value when starting material having the determined moisture is fed to the screening stage, feeding starting material to the screening stage, transferring a screen oversize arising in the screening stage to the dry grinding system, and grinding the screen oversize in the dry grinding system.

Method and system for grinding fragmentary starting material

A method and apparatus for grinding iron ore or iron ore concentrate is able to grind iron ore or iron ore concentrate economically. In the method and apparatus disclosed, the material is ground in circulation in a material bed roll mill, one fraction of the iron ore or iron ore concentrate ground in the material bed roll mill is recirculated to the material bed roll mill and the other fraction of the iron ore or iron ore concentrate is classified into oversize material and fines, and the oversize material is returned to the material bed roll mill.

Method and apparatus for grinding iron ore or iron ore concentrate

The invention relates to a grinding roll with a basic roll body as well as a plurality of wear protection elements made from hard metal which form at least a part of the roll surface. The basic roll body has recesses extending in the circumferential direction, a plurality of wear protection elements being disposed one behind the other in the circumferential direction in each recess.

Grinding roll

Growing community of inventors

Everswinkel, Germany

Egbert Burchardt