jul 26, 2021 coal pulverizer-clirik raymond roller mill. raymond coal mill, also known as raymond mill, raymond roller mill, is a new type of mill that replaces ball mills to process coal powder. the roller of raymond coal mill is tightly pressed on the grinding ring under the action of centrifugal force. therefore, when the grinding roller and grinding,types of boiler coal pulverizers bright hub engineering,jan 29, 2010 thermal power plants use different types of coal pulverizers. the method used is attrition, impact, or a combination of both. this article explains the characteristics of the three main types- attrition, impact and attrition, and impact or hammer. selection of the type of pulverizer depends on the grindability of the coal, the capital costs and maintenance costs,