That being said, 2/3CY is right at the limit for hand-fed operations. Placer is usually figured by cubic yards or meters. Your desire for 1 TPH is roughly 2/3rds cubic yards an hour. Poling and Hamilton’s work is for machine fed operations. Where am I going wrong? How to SIZE a sluice?įirst consideration is, what is the character of the material you will be putting through your sluice?

– the slurry flowing in the box should contain 1000 kg/hr at 12% Solids = 1000/.12 – 1000 + 1000/2.8 = 7700 l/hr = 128 l/min is my diluted flow feeding the sluice. 4800 ls/min of water per width meter of sluice

– one inch high angle iron riffles need double quantity i.e. – heavy (6mm thick) non-flattened expanded metal riffles need 2400 ls/min of water per width meter of sluice for to work properly I want to process 1 TPH (60 liters/min) of solids, what size a sluice box set-up do I need? How much sluicing area? How wide, how long should the sluice be?įollowing values are recommended in Poling’s (1989) and Clarkson’s (1990) scientific sluice box studies: As you will see, in summary, most can optimize or troubleshoot a sluice box but few or none can size a gold sluice box. This week I went and asked “ how to SIZE a sluice box” to the crew on a large gold prospector forum and other sluice or gravity gold recovery ‘experts’ and gathered the list of emails and forum posts here below.

Gold dredge small pump design