The surfaces of native or free gold containing particles are normally hydrophobic and, if the surfaces of such particles are relatively free of contaminants they
The mold used in producing the raw briquet is shown in Fig. 15. This consists of two halves of hardened tool steel, held together by
Tungsten and Molybdenum The investigation thus far had considered, both singly and in binary combination, the entire list of available metals with the exception of
Metallurgical research has discovered many an alloy possessing properties not combined in any single metal, and progress still consists chiefly in the investigation and utilization
The reagents now used in flotation consist of various acids or salts, which may be either electrolytes or nonelectrolytes, dissolved in water and some substance
In the exploration of a copper deposit by drilling, obvious advantages are to be gained from a distinction between primary and secondary ore. Perhaps the
In preparing this paper the object has been to set forth facts relating to lighting or illumination problems faced in underground mines, which, judging from
From the viewpoint of mineral economics, the ultimate and significant production cost is that per unit of metal produced rather than the cost per ton
With the exception of gold, metal prices are subject to frequent fluctuation, resulting in corresponding variations in the value of their ores. Metal prices are
Engineering valuations of raining properties are made for a number of purposes, principally the following: For purposes of purchase or sale on behalf of prospective