Fls Vertical Raw Mill Design Specification 2017-12-14 Fls Vertical Raw Mill Design Specification Cement grinding Vertical roller mills versu.Vertical raw mill is a type of industrial equipment used to crush or grind materials into small particles. Vertical raw mills are widely used in the concrete and mining fields, and are also used to process gypsum. These units can process both raw and recycled materials, while helping to reduce waste and preserve virgin supplies of these materials.