QSX300-1 placer washing unit is the third generation production product which is partly improved according to the long-term production practice of the unit. The unit is most suitable for small-scale gold mining, collective and individual gold mining, and can also be used as the laboratory of geological prospecting departments of placer gold and of metallurgical, geological and mine test units. This machine has the following characteristics: (1) the power unit can be powered by diesel engine, also can be driven by motor. (2) simple structure, compact, small volume, light weight, easy to use, save manpower, low cost, easy to move. (3) wide grain size, high recovery rate and low yield. Especially for fine grain gold selection has obvious effect. (4) the investment is small, the economic benefit of quick washing gold deposit is remarkable, and better washing index can be obtained for valley, alluvium, terrace and river ore mining with less cement.
　　(II) main technical specifications:
　　(1) Technical specification for units:
　　Unit total production capacity: 2-3 m / h.
　　Concentrate yield: 0.4-0.5.
　　Gold recovery: 90-96.
　　Water consumption: 4 m / h.
　　Liquid to solid ratio: about 3:1.
　　Maximum particle number: 50 mm.
　　Unit weight: 250kg.
　　Unit shape size: 1350U 800m 1260 (long, wide * high) mm.
　　(II) other data:
　　Diesel engine type
　　Type: 165F.
　　Power: 3 hp, 2400 / min.
　　Electric model: type: y series (I 44).
　　Power: 1.1 kW, 1400 revolutions / min, seat 90S.
　　water pump
　　Diesel engine type: flow rate: 4 m / h.
　　Suction: 4 m.
　　Power: 0.5kW.
　　Number of revolutions: 2800 rpm / min.
　　Electric type
　　Flow: 10 m / h.
　　Suction: 12 m.
　　Power: 0.75 KW.
　　Number of revolutions: 2800 rpm / min.