Crushing of coal by bowl mill.

Bowl Mills have been widely used for pulverizing various kind of solid fuels for various applications. It can produce the pulverized fuels of wide range of fineness from 65 to 95% through 200 mesh to meet the requirement of combustion equipments of various kinds. Its excellent fineness and perfect classification of coarse particles enabled the usage of hard burning fuels such as petroleum cokes and anthra-cite, widely expanding the horizon of fuel recourses.Owing to its effective grinding and classifying characteristics, internal recircula-tion of pulverized fuel inside the mill is reduced to minimum and operation of low air to fuel ratio is possible, which is generally required for low NOx combustion.Bowl Mill is also suitable for the production of slurry fuels because of its perfect elimination of coarse particles and low power consumption.Grinding rolls are of welded overlay type of super anti-abrasion materials and grinding surface can be rebuilt after worn.For its excellent performance, latest version of this Bowl Mill, MRS type with rot-ary separator received the 1989 award from Japan Society of Mechanical Engineers.