... sands, which are finally separated by a cone centrifugal machine..This kind of gold mining, has the advantage that ... part sides with RL35 6mm lining Hopper : 2.4 x 2.4 hopper ex 12 mm plate and support ... mm riffle table, 150 mm boil box, 4 lift out hydraulic riffle sections 1200 mm x 400 mm ... valves to splarge pipes, 50mm feeds with valves to hopper,4 x 40mm outlets with valves for hydraulic riffles, ...