Help: Newbie, Ball Mill, Processors | Gold Refining Metal ...
WEBJan 3, 2012 · I set aside the metal backs, and only used the ceramic/plastic/gold boards in the ball mill. 4. loaded the ball mill last night with 50 1/2" chromeplated steel balls, 50 3/4" chromeplated steel balls, and the 49 processors that had been cut into quarters, and had the stainless steel backs set aside).