hardness of rock phosphate for grinding
Table of Bond Work Index by Minerals - 911 MetallurgistJun 19, 2015 . Oil shale, 17.5, 15.8, 17.4, 17.5, 38.2, 16-78, 5. Oyster Shells, 15.1, 13-19, 5. Phosphate fertilizer, 16.5, 12-30, 6. Phosphate rock, 10.9, 10.5, 9.9.hardness of rock phosphate for grinding,Pre-treatment of rocks prior to comminution – A critical review of .Comminution essentially involves two processes-crushing and grinding. ... With the increase in hardness of rock, electrical shocks can easily cause fracture in .  studied the impact of pre-treatment i.e. pre-weakening of phosphate ore by.Basics in Minerals Processing - 4:18. Size control in crushing and grinding circuits ... All deposits of minerals, rock or ores have different hardness depending on the chemical composition and.