coal pulverizer designs are Vertical Roller Mills. Figure 2 shows a cutaway view of a Babcock and Wilcox MPS Pulverizer. RingRoll and BallRace Mills A ball or roller between two races or rings provides the grinding surfaces on which pulverization occurs. One or both of the races may rotate against a ball or roll (in a
The steel types according to tables 4 and 5 are defined as follows. Steel type L: Products with a specified minimum yield strength < 460 N/mm2, neither quenched nor quenched and tempered. Steel type H: 2 Products with a specified minimum yield strength > 460 N/mmand < 700 N/mm2 and all grades of quenched and quenched and tempered products.