A pulverizer or grinder is a mechanical device for the grinding of many different types of materials For example, a pulverizer mill is used to pulverize coal for combustion in the , mill; 15 High Speed 151 Attrition Mill 2 Beater Wheel Mill; 3 Hammer Mill; 4 Demolition pulverizer; 5 See also; 6 References; 7 Bibliography.