| 摘要 |
<p>A dredge for recovering alluvial gold from streams and ponds is described. In use the floating dredge is provided with a motor, a pump, and a closed sluice box 5 submerged just below the surface. High pressure water from the pump 2 is delivered to the sluice box 5 through two eductors 14, whereby the suction created draws gravel from the stream through a suction hose to the sluice box chamber in which the flow rate reduces whereby the denser materials fall in the bottom of the sluice box and are recoverable therefrom. <IMAGE></p> |
