The problem with fine, and invisible gold, is that gravity no longer is the largest force at play. The smaller the particle, the more it is swayed by electrical attractions. This is the heart of electro-chemical recovery, as new, higher charges of electricity are carried by the recovery chemical, forcing the gold atom or particle to attach itself to the new friend.
The gold you will commonly be recovering is overwhelmed by currents of water, attachment to other metals, or locked in organic attachments which must be broken, to be recovered.
Assuming you have collected all of the gunk in the filters, it looks little like gold at this point. The gold is drawn out by leaches...chemical agents which select the gold particles from all of the sand, clay, debris, other metals and molecules in the filter, simply by dipping them in the leach, waiting the appropriate time, then setting the leach aside for the next step. The filters are then washed out, and replaced in the filter holders for a new run.
The final last step, is to "Precipitate" the gold as gold metal sand or flakes.
Following this the gold powder and flakes are filtered out of the final step.
By itself, the filtration unit makes great drinking water, but the gold is still invisible and trapped in the gooey mess in the filters, and useless without the leach-precipitation process.
The Leaching process is a home-made "Halox", using HCL acid, Chlorine powder and common salt.
This makes a powerful chlorine-based leach which overnight will strip out the gold from filters, is then drained off, filtered, then buffered down to near nuetral PH.
Precipitation is by Zinc, Sodium Nitrite, Oxalic acid, Copperous, or other precipitants,depending on your preferences to a fine gold powder, which forms gradually overnight.
This is .999 gold, and can be now smelted down to the shiny metal we all know and love.
The entire process is covered and included with our MicronGold Machine unit, and GMW-Activated Carbon products.
Be sure and see the other pages dealing with the primary collecting and recovery methods outlined as;
Polyspun filtration
Carbon filtration
Resin filtration
All of these are aimed at recovering gold and Precious Metals (PM's) AFTER you have incorporated your dredging, grind or gravity recovery efforts, NOT as a primary recovery attempt of native gold from natural sources. It is meant to capture gold and PM's that bypass the normal system recovery methods. The only way this works as a "Primary" recovering method, is for gold already at colloidal or micron levels, such as in Gold-bearing waters, wells or areas where the gold was processed, yet not recovered .
It is important to understand WHERE the gold is in your recovery attempts.. as for some this is NOT the system you need, as it may be too large or complexed to be effective. This system works best for the reasons outlined above, and will do the job well within it's capacity. For truly epic flows, like major production or river recoveries, think in terms of diversion to ponds, slow flows and either carbon or Resin. Basically, Carbon is best in passive, under 7 volumes per minute, and resins for valuable leaches or more concentrated flows, like dredge/sluices/rich gold areas.
