Make a Ball Mill in 5 Minutes - InstructablesThis is for all the pyro nuts that I came across on Instructables. This can be used to grind chemicals to a very fine grain or to polish rocks.Wiki says "A ball mill is a.rock grinding ball mill,Mill (grinding) - WikipediaA mill is a device that breaks solid materials into smaller pieces by grinding, crushing, or cutting . For instance rock crushing or grinding to produce uniform aggregate size for construction purposes, or separation of rock .. SAG mills are essentially autogenous mills, but utilize grinding balls to aid in grinding like in a ball mill.
rock grinding ball mill