grindability index roller mill limestone
Alternative Approaches for Determination of Bond Work Index on ... the HGI values, grinding of fine –grain samples involved. ... approach, is Bond's grindability test and the second one is Hardgrove index, which generally used for coal.In recent, the brittleness test/friability value of bauxite, limestone, barite, ...These studies were carried out in a standard ball mill 300 mm X 300 mm size.