Typical mass balance for the use of Sluice-Boxes 

• Feed: alluvial gold ore: 100m3 or 180t (one day) = 100%
• Rougher sluice-box pre-concentrate: 180kg = 0.1%
• Cleaner sluice-box concentrate: 18kg = 0.01%
• Only the cleaner concentrate or 0.01% of the material is amalgamated!
• 99.99% of the material is discharged completely free of mercury contamination
• Cleaner sluice-box tailings are recycled to feed