A. Material is fed into the hopper

B. Material is gravity fed and washed into the scrubbing and screening trommel where it is washed and classified

C. Oversized material is discharged as tailings (nuggets retained in trommel nugget trap)

D. Undersized material is fed onto the transverse spiral concentration belt which pre-concentrates material and eliminates sluice surging

E. Heavy fraction is retained by concentration belt and fed to concentrate sluice

F. Light fraction is removed by concentration belt and fed to tailings sluice

G. Minimal volume of heavy concentrate removed for final cleaning step