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Sunday, December 01 2013

Dry washers are like highbankers except they do not use water to recover gold. While wet processing is nearly always faster and more efficient, especially for fine gold, dry washers are the best tool for recovering gold nuggets, pickers, and flakes from dry materials in the desert or other areas where water is not plentiful.

dry washerDrywashers are operated by shoveling gold-bearing gravels into an upper box which is covered with a screen. The larger rocks that are too big to pass through the screen slide off. Gravel small enough to go through is fed down into the lower gold recovery box, which is an inclined trough with cross riffles much like a sluice. The bottom of the recovery box consists of a thin, light-weight porous cloth. Beneath the riffle box is a blower that pulses air up through the cloth. The vibrations and air flow, combined with the shaking and classifying action of the dry washer allows the gold to settle to the bottom where it is captured in the riffles.

Keep these tips and tricks in mind when using a dry washer:

• Moist soils and clay cause problems, so be sure to crush lumps of clay and dry your dirt in the sun (plastic tarps are ideal) before running through your dry washer. Surface soils might seem dry, but if you dig down a few inches, you may find moisture in the soil that will cause your sand, gravel, and gold to stick together.

• Double-check all the "throw away" rocks. Scanning them with a metal detector is a great way to ensure you're not tossing aside gold-laden rocks. Also, don't assume old tailings piles have been totally worked out. This is  another time to use a metal detector because ordinary rocks could be  laced with gold and completely over-looked by earlier prospectors.

• Consider using a dry gold vacuum to clean out crevices in bedrock. Feed the material that you sucked up into your vacuum bucket into your dry washer.

• Drywashing can be a very dusty process, so try to stay upwind as much as possible and wear a dust mask.
• Do a clean up every couple of hours, or after processing roughly one to two yards of material.

Looking for a drywasher? The Gold Buddy brand is available in 4 sizes and also check out the new heavy duty
Gold Storm dry washer. Whichever you choose, SAVE $10 with coupon code TAKETEN at check out. Offer expires Dec. 31, 2103.

Posted by: Denise AT 06:14 pm   |  Permalink   |  0 Comments  |  Email

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