Wash plant for mini excavator Larger Scale Placer Mining ...
Dec 31, 2013· Big trommels can work fine anyone with trommel experience can tell you that''s a fact. That trommel failed because it was a poor version of a reverse helix design that depended on a rubber wiper to sweep the gold uphill. The flimsy rubber failed almost immediately and they probably got less than 10% recovery on the gravel they processed with it.