vertical roller raw mill maintenance operation,Vertical Roller Mill repair - Castolin EutecticIn the 70s, vertical roller mills became increasingly dominant for grinding raw materials main- ly for the cement industry due to their high energy efficiency and excellent drying capacity. For many years Castolin Eutectic expert know how together with our state-of-the-art technologies have been used to repair VRMs.vertical roller raw mill maintenance operation,On what depends the grinding efficiency? of Vertical Raw Mill .1 On what depends the grinding efficiency? of Vertical Raw Mill. 1.1 Roller specific operating pressure; 1.2 Material quantity on the table; 1.3 Material distribution on the table; 1.4 Roller and table wear profile; 1.5 Dam ring; 1.6 Nozzle and armour ring; 1.7 Water injection onto the table; 1.8 Table rotating speed.