The production of rock type vertical roller mill line covers feeder, jaw crusher, vibrating screen,cone crusher, ball mill, jigging machine, shaking table, drying system, magnetic separator, conveyor and so on.2-300 tons per hour processing capacity is available in SBM factory.Beneficiation theory of chrome ore mining plants: After crushing by the crushers, chrome grains are liberated or dissociated from the gangue and the mixed ore can be fed to the separation processing for the secondary processing stages. Vertical roller mill are allocated according to the specific natures of the chrome ore. The main methods for chrome beneficiation are mainly gravity separation and magnetic separation.  And the vertical roller mills are also mainly gravity separators and magnetic separators. So at the beneficiation process, the equipment are quite different from each other because the chrome concentrating methods are different for different chrome ores. Many methods can be used in chrome ore beneficiation plants.