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Stallion DryWasher - Gold Fever ProspectingStallion DryWasher - Drywasher features the new Jobe Hurricane Blower (HONDA gcv 160cc air cooled 4 stroke). The Largest capacity dry-washer manufactured in the USA! . The hopper and recovery box are made of aircraft grade aluminum, and the hopper has an adjustable flow gate to meter the material evenly.free dry washers planes,DryWashers Gold Mining - 911 MetallurgistApr 12, 2018 . To respond to dry washing the material treated must be almost completely dry. In most cases 3 percent moisture is considered a maximum. The gold particles must also be completely liberated and free of cementing material such as caliche. In addition, effective separation is usually dependent on use of a.dry-washing - The New 49ersAfter packing our gear to the site, we set the engine and dry-washer in place; with the engine upwind to keep it free from the dust generated by our dry-washer. Then, with the dry-washer delivering about 90 beats per minute (possibly a little fast for the conditions we were working), we proceeded to dig and feed gravel to the.