Abstract:

The production of placer gold main includes two details which are gold dredger and island concentrator.It makes more golds losses,one is due to some question such as field，digging etc when the dredger mines ore,another due to no adaptation betw een process equipment,technical parameter and ore practice characteristic when ore dressing by dredger and is land concentrator.According to experience of placer gold practice.Mining plan by technical office must be done，recovery on leaks ore and gold above screen with helpful establishment must be harden too.The jigging type dredger process and the concentrator process of classification before separation,adaptes ore characteristic,it is also measures to im proving the recovery of placer gold.

Key words: Placer gold, Separation, Loss, Recovery