Ultrafine Vertical Mill Grinding Mill,Stone Grinding. Ultrafine Vertical Mill are suitable for huge capacity producing, widely used in grinding non-flammable and non-explosive materials under 7(the Moh's hardness), such asquartz, feldspar, calcite, talcum, barite, fluorite,iron ore,copper ore quartz, especially for slag,cement clinker,zircon sand, fly ash and carborundum, coal, etc.