The Haile Gold Mine was the largest gold producer east of the Mississippi River prior to 1942. It is currently the only producing gold mine
A new approach is emerging that deals with desulfurization of coals by bio-mediated reactions. Desulfurization of coal involves oxidation of pyrite and elemental sulfur inclusions by
I told you I wanted to do a panning video. So what you’re going to do is, I’m going to break this down a little
The simplest precipitation equipment for a small mine is what is known as a zinc-box (Fig. 150). This consists of a long, narrow, sloping, wood
Mercury or quicksilver fed into stamp mortar-boxes and riffles or applied to copper plates has been for ages the method of catching free gold. Many
The disposal of mill residues or tailings costs 2 to 6 cents pel ton, however carefully it is done. Residues may be moist sand which
During the past 50 years or more there has been a great waste of money, energy, and time in devising, building, and trying many machines
As coarse gold is not dissolved by cyanide, it must be removed from an ore by one of the methods already described. Weak solutions of
Details of the use of corduroy are given in the section covering gold and silver, but there is no reason why this material should not
Having refractory ore under treatment, it is generally the case that copper is also found in it. While roasting, the presence of copper is favorable