Coal Mills in Thermal Power Plant | PDF | Mill (Grinding) Scribd
Low 10 to 20 RPM Ball tube mills (16 rpm in Vindhyachal) Medium High 40 to 70 RPM 900 to 1000 RPM ... The Mills are designated as BBD4772 Where, B Broyer (Name of inventor). B Boulet (French word for Balls). D Direct firing. 47 Diameter of ... The operating characteristics of bowl mills make it the best mill available for the direct firing ...