Seth - with 12 PCs you will spend vast multiples more on chemicals and equipment than you will on actual recovered metal. Don't waste your money or your time. It sounds like you are too early in the game to think about going there. You might want to move that direction "some day", but seriously, not today.
A buddy comes by nearly every day to watch me scrap and oooohs and aaaaaahs over any sign of a gold finger, and is sure he wants to start refining. He knows nothing about chemistry, but refining is simple. He saw it on youtube.
Check out the gold refining forum. If you don't understand what they are talking about, you're not ready.
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