The document specifies a method for determining the grindability index of hard coal using the Hardgrove machine. It also specifies the procedure for calibrating the test machine and for preparing the standard reference coal samples.
DIN 51742:2001 history
2001DIN 51742:2001-07 Testing of solid fuels - Determination of Hardgrove grindability index of hard coal
2001DIN 51742:2001 Testing of solid fuels - Determination of Hardgrove grindability index of hard coal