My friend Don was manufacturing centrifuges right up to the day before his untimely death, he made centrifuges ranging in size a 6 inch laboratory bench top model right up to a 38 inch monster.
Their primary use is to recover gold from placer and they did a dam good job at it, some folks who have used Don's centrifuges claim the gold recovery exceeds that of much better known machines.
The long of it is I know own the drawings and have permission to manufacture these units one of the things holding me back was living in Manitoba were the machine shops are still using WWII equipment with modern day pricing. This is about ti chance with my move to BC I'll have access to machine shops fully equipped with modern CNC, water jet, plasma or laser lathes and milling machines.
My second problem as you may have guessed is money but as always this will change. And I have already purchased a few fluid couplings and few other items needed to build a couple of the units shown below.
The centrifuge units that I want to focus on is a 12 inch unit with a vibrating classifier deck mounted above the bowel. Below are the specifications for the 12 inch unit.
Feed Capacity (will vary with material) -70 to 130 lbs per minute
Typical fluidization water required -32 to 40 gpm Fluidization water pressure -23 to 30 psi Water inlet pipe size -1-1/2 inch pipe Feed Density -5 to 65% solids by weight Feed Size -6 mm maximum Typical flush cycle duration -3 to 5 minutes (manual flush) Bowl force upon ore -70 G’s at 640 rpm Motor -Electric, 2 Hp, 110/220 volt, 1 Ph, TEFC industrial grade or 2 Hp, 230/460 volt, 3 ph. Water pressure gage -4 inch precision, liquid filled, 0-60 psi Ore feed hopper -Unit can be manually bucket fed, or by slurry pump, or by small conveyor. Inlet water requirements -Near clear and filtered to 50 mesh
Here is Don with a 21 inch centrifuge fine tuning it on this test run being made on a Fraser River placer claim.
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