What Are The Balls Made Of In Ball Mills
Jul 16, 2021 Jul 16, 2021. Black powder must be made in a ball mill to work properly. a ball mill is a rotating drum with dozens of lead balls inside. the 3 chemicals are loaded into the ball mill, along with the lead balls, sealed shut and allowed to rotate for anywhere between 1 hour and 24 hours. as the ball mill rotates, the lead balls will crush the chemicals.
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