To summarize , we can separate gold ore into two category : alluvial /placer gold and rock gold . For rock gold ,roughly,the gravity separating flow goes like : crushing–>milling—->gold centrifugal—-> sluice box —>shaking table .For alluvial gold with sticky mud or clay , the flowchart flow goes like : feeding—> gold trommel —> gravity mineral separator like centrifugal concentrator,jig separator,spiral chute and shaker table.
All machine involved the alluvial gold processing plant .we can call it alluvial placer gold machine .