Grinding down circuit boards? - Gold Refining Forum.com
Oct 15, 2009· Re: Grinding down circuit boards? Post by complex-chemistry » October 15th, 2009, 8:17 pm I borrowed a 3 phase 415V 7.5kW turbo mill with cyclone dust control to powder complete mother boards to about as fine as domestic flour at 10,000 rpm rotor speed.