Cage mill for comminuting ores or coal etc. - with hard facing on leading faces of impact bars and support rings inner faces

摘要

Each cage consists of end members or end rings with axial bars extending between the end members or end rings and secured by welding. The cages are constructed of steel and the steel of the cage is protected against abrasion, in the regions subjected to abrasion in use, by specially constructed protective members detachably mounted on the end members or end rings and on the axial bars. These protective members consist of steel backing with a hard wear-resistant facing preferably a cemented carbide composition, such as cemented tungsten carbide supported on a steel backing and presented to the material passing through the mill in such a manner that the carbide is subjected principally to abrasion and to impact by the material passing through the mill and is not loaded structurally as in torsion or tension. The protective members are made relatively small for ease of manufacture and installation and the carbide applied thereto is in the form of segments so that there is little tendency for the carbide to fail due to deflection of any of the parts of the cages which could impose stresses on the carbide material tending to break it if the carbide pieces were too large.