gold mining techniques in zimbabwe - bidsolutions. Sbm Low Price Alluvial Gold Trommel Plans,Gold Trommel Wash . It is a kind of combined gold mining machine, designed especially for placer gold sand, clay, soil, river sand and alluvial gold sand which contain gold sand and nugget in the raw material, gold wash plant includes sieving, separating through trommel, sluice, water pump, .