Investigation of Effect of Operational Parameters on Vertical Roller Mills’ Performance

Abstract

This research study was aimed to investigate the effect of operational parameters on vertical roller mills’ performance. Test works were held at a mobile ore grinding plant (OGPmobile) which belongs to Loesche GmbH.According to aim; effect of dam ring height (design parameter), effect of grinding load, effect of classifier rotor speed, effect of airflow rate and effect of mill differential pressure have been investigated. Test material was epithermal quartz vein type gold ore which has a Bond Work Index 17.8 kWh/t. Within the thesis study, grinding test works were performed to investigate the influences of the design and operating parameters on vertical roller mill grinding performance. In this context, systematic test plans have been generated. According to test plans; dam ring height, grinding pressure, classifier rotor speed, airflow rate, mill differential parameters were tested by considering specific energy consumption and product fineness of the mill.