Vertical roller mill is mainly used for grinding raw meal, clinker, Ground Granulated Blast Furnace Slag, iron ore, limestone, coal powder, coke powder, coal gangue, fly ash, volcanic ash, gypsum, calcite, pyrophyllite, quartz, clay, sandstone, bauxite and other processing industry related to metal and non-metal mine.
The material is fed through inlet pipe and falls to the center of grinding plate which is rotating at a constant speed. The resulting centrifugal force causes the material to evenly distribute around the table to form a material bed layer with a certain thickness. At the same time, the material is crushed due to compaction and press by the rollers above the grinding plate. Under the continuous drive of centrifugal force, the material is constantly moving to outer edge where it is entrained into hot gas stream and carried up to the classier through middle housing. The moisture is evaporated rapidly when the full heat exchange occurs between material and hot gas. The fineness of finished product is determined by the classifier. Oversized particle is rejected and falls back to grinding plate and qualified particle is carried to powder collector, where finished product is collected and delivered to storage silo.