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DJW

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  1. A CENTRIFUGE IS ONE OF THE BETTER TOOLS TO CATCH VERY FINE GOLD HOW EVER YOU DO NEED TO BE ABLE TO CONTROL WATER FLOW, AND LIKE MOST RECOVERY EQUIPMENT THEY LIKE CLASSIFIED MATERIAL . SO YOU WOULD HAVE TO BE ABLE TO SCALP WATER OFF OR ADD WATER DEPENDING ON WHAT SIZE YOU BUILD.
  2. DJW

    Jig Concentration Ratios

    DAVID I HAVE A PLANT SIMILAR TO YOURS AND HERE IS WHAT WE HAVE LEARNED; AT 30 TON PER HOUR GOING INTO THE SCRUBBER WE HAVE SET THE ROUGHER (42" IRD SAME RAGGING AND SCREEN SIZE AS YOURS) AT 90 RPM, WE HAVE RUBBER NIPPLES SIZED AT 1/8" AND SET THE HUTCH PRESSURE SO THAT WE HAVE A FLOWING SLURRY COMING OUT THE BOTTOM. THIS GIVES A 98% PLUS RECOVERY WHILE YEILDING ABOUT 1200 LBS OF CONS PER HOUR. THAT WAS THE EASY PART TO SET UP AND HAS WORKED ON THREE DIFFERENT PROPERTIES. AFTER THAT YOUR ORE TYPE IS A BIG FACTOR. WE HAVE ONE PROPERTY WITH LOCKED UP GOLD WHICH REQUIRED A BALL MILL AFTER THE ROUGHER BACK ON TO A JIG AND TABLE. AND ONE WHICH WENT ACROSS A FINISH JIG AND TO THE REFINER. EVERY ORE IS DIFFERENT TEST YOUR TAILINGS TEST TEST TEST!!! BE VERY CAREFULL USING TABLES, THEY WILL WORK GREAT IF YOUR CLASSIFIED BUT A TABLE WILL NOT SEPERATE 100MESH MINUS GOLD FROM 20 OR 30 MESH ROCK. I LIKE THE GOLDTRON TABLE IF IT HAS THE JIG SETUP WITH TWO SORTS GOING ONTO THE TABLE, THE BIG SIDE WILL WORK WELL, BUT TEST THE SMALL SIDE FOR LOSS. ITS NOT SCIENTIFIC BUT ITS WHAT I KNOW, AND I ALSO KNOW A GOOD LAB IS THE BEST TOOL IN THE BOX.
  3. DJW

    Ball Mill Question

    HELLO 911METALLURGY; I'VE NEVER SEEN THIS SITE BEFORE, A LOT OF GOOD INFORMATION. I WILL BE LOOKING AT THIS ALOT! NEVER TO LATE TO LEARN DJW
  4. TO REALLY DESIGN A TROMMEL YOU NEED TO HAVE A PRODUCTION GOAL IN MIND, A 36" DRUM I WOULD CONSIDER A SMALL PRODUCTION OR BULK TESTING PLANT (20 TO 30 TPH) SO I WOULD ASSUME IT WILL BE FED BY A MACHINE OF SOME KIND, IT IS HARD TO AVOID A FEED SURGE WHICH CAN OVERLOAD THE BARREL, MY HUMBLE OPINION IS A DIRECT DRIVE TO AVIOD STALLING THE PLANT OR GRAVITY DRIVE SO THE MORE MATERIAL FED THE MORE WEIGHT ON THE DRIVE WHEELS. I USED TO HAVE A LITTLE BALL MILL THAT WAS BELT DRIVE, IT WORKED AWESOME UNTIL IT RAINED OR THE BARREL GOT WET. I BUILT A 32" X 10' TROMMEL 2 YEARS AGO CHAIN DRIVE AND IT WORKS RAIN OR SHINE. GOOD LUCK
  5. HECKLER FABRICATION HAS A VERY DETAILED SLUICE DESIGN AND TESTING AVAILIBLE ONLINE. I SEE THAT YOU ARE USING A DUPLEX JIG FOR CLEAN-UP, HAVE YOU CONSIDERED DOING AWAY WITH THE SLUICE AND GOING FROM YOUR WASH PLANT STRAIGHT TO THE JIG. WE HAVE HAD VERY GOOD RESULTS WITH THIS. RECOVERY OF FINE GOLD GOES WAY UP, WATER COSUMPTION GOES DOWN, BLACK SANDS ARE NOT A PROBLEM, AND NO SHUT DOWN FOR CLEAN UP.
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