Ask the Experts
June 2014 by Chris Ralph• How many parts per million make a project viable?
I know big mining companies use cyanide and other leach systems to recover gold from ore. Is this the only economically feasible way to recover the values?
Treating ore with a plasma torch or shock waves?
Q: Aside from the softness scratch test and other methods of identification, what feedback would you have on identifying gold in hard rock that may be mixed with other metals that affect its color?
Shaker tables and jigs
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