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The use of fixed sluice in 300L d redger to retrieve large grains of gold achieved good benefit

Zhang Jiwen (Han Jayan Gold Mine of M, M. I)  
The dredger of 300L in volume imported from Netherlands often caused the larger grains of gold running off through the screen. In order to raise the total recovery, a test was made for retrieving large grains of gold from gravel in the screen. It showed that the fixed sluice was suitable to retrieve large grains of gold, The size control screen fixed on the above of the waist of the gravel sluice achieved good results. Also, the use of angle steel riffle strengthened the efficiency of ore dressing.
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