Sustainability of coal mines Separation of clean coal
May 01 2021· Wet grinding experiments conclude that 30 min of grinding time 350 rpm speed water addition of 50% w/w and 2 mm grinding media results in achieving the fine sized coal slurry with an average particle size of 45 μ and total undersize less than 75 μ It was observed that direct centrifugal separation at 50% pulp density can result in