Ask the Experts
January 2015 by Chris Ralph• How do I clean up gold encrusted with iron-sulfides?
Exposed veins and outcroppings can be a great source for gathering good gold ore for processing. Veins and outcroppings do require a lot of work to free the ore from its earthen grip, but this labor can be very rewarding.
Choosing the right method to move your ore and waste is all about making the right choices. Sometimes more than one method may be used during the life of a mine as an operation expands and grows.
In processing gold, silver and other valuable ores, the minerals containing the values, such as metallic gold, silver-bearing sulfides or other minerals, must be freed from the surrounding host rock before those valuable minerals can be captured.
After a short time, the tailings pile can get very large, and can actually block the downstream end of the sluice box.
It’s accepted knowledge that wet methods will recover more fine gold than dry methods and processing the gravel as a whole will get more gold than only using a metal detector. The question is how much more?
The ideal leaching chemical would leave behind what we don't want or need in the ore and take only the valuable metals.
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