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The old timers using a stamper , always had the crushing pass through a 100 mesh . Aperture size 0.147 m.m. or 0.006 inches .
this is the way you could recover most of the gold . Some of us like to crush up rocks, using a impact mill for example . This will crush to 2 m.m. or less . After screening you have some oversize that still has gold in . What are you going to do with that ?
This is my idea and only an idea .First step buy and old cement mixer . Next get an old compressor tank or maybe an old LPG gas bottle , like off a caravan . Cut the top off and fit it onto the cement mixer . It is no good using the cement mixer by itself , the steel is too thin . Compressor tanks and gas bottles have round bottoms . You need some s/steel balls and they can be got on E-bay . Get a.few different sizes . Put the balls in and say 5 kg. of over size plus water . Let it run for 30 mins and then screen again . The good thing about a cement mixer is that you can tip it out .
What do you think of this idea ?
this is the way you could recover most of the gold . Some of us like to crush up rocks, using a impact mill for example . This will crush to 2 m.m. or less . After screening you have some oversize that still has gold in . What are you going to do with that ?
This is my idea and only an idea .First step buy and old cement mixer . Next get an old compressor tank or maybe an old LPG gas bottle , like off a caravan . Cut the top off and fit it onto the cement mixer . It is no good using the cement mixer by itself , the steel is too thin . Compressor tanks and gas bottles have round bottoms . You need some s/steel balls and they can be got on E-bay . Get a.few different sizes . Put the balls in and say 5 kg. of over size plus water . Let it run for 30 mins and then screen again . The good thing about a cement mixer is that you can tip it out .
What do you think of this idea ?