... from 0 to 150 RPM) drives the roll. Vibration feeder with control is provided for feeding. Abrasion resistant endless ... applications, such as the beneficiation of abrasive, refractory and ceramic raw material (i.e., alumina, silica, carbide, magnesite, quartzite, etc), ... , removal of iron silicates from limestone or magnesite, glass raw materials cleaning silica sand, quartz, feldspar, dolomite, etc. ...