Aug 1 2011 Every coal pulverizer is designed with a particular fuel grinding capacity or throughput at a certain Hardgrove grindability index HGI based on a defined raw coal size moisture content and desired fineness level These factors are significant and must all be taken into account when discussions of Aug 1 2011 Every coal pulverizer is designed with a particular fuel grinding capacity or throughput at a certain Hardgrove grindability index HGI based on a defined raw coal size moisture content and desired fineness level These factors are significant and must all be taken into account when discussions of