A vertical mill for material such as coal includes a housing having a centrally located feed chute, and encloses a rotary grinding table having an air opening unit formed as multiple segments, particularly called as vane mill liner, removably attached to the rotary table’s outer periphery and containing air flow passageways. Located adjacent to the vane mill liner unit is an outer segmented ring attached rigidly to the pulverizer housing, with a radial gap being provided between the outer ring and the vane mill liner segment.
The need for change of vane mill liners can be design oriented, to change the air flow requirements, and also because it is a wearable part. The same is fabricated from SAILHARD plates and further hard faced at wear prone areas to give a longer life. It is suitably manufactured to have good finish and high strength.