The leading antimony mineral is stibnite. In smelting stibnite ore two processes are available, precipitation and roasting-reduction. The former is suited, only for high-grade ores.
Anton Eilers, who was then interested in the lead smelting and refining business near Salt Lake City, Utah, made a somewhat radical departure from the
Open-pit mining methods are applicable to mining ore deposits that apex at or near the surface. If the deposit apexes below the surface, the overburden
Stacker control devices can range from minimal stockpile level sensors to quite complex control systems depending on the desired degree of automation. For the simple
The use of zinc dust for precipitating the precious metals from cyanide solutions is well established now in many places, and has many advantages over
Auxiliaries Actuated by Oil under 135 lb. Pressure When steam is used by the auxiliaries, which operate brakes, clutches, etc., it constitutes an important percentage
The ore deposits of the Warren district, in which the mines of the Copper Queen Consolidated Mining Co. are situated, have been described in a
Maintenance Policy Area Level 1 (basic) Level 2 (controlling) Level 3 (improving) Level 4 (best) 2.1 MAINTENANCE MANAGEMENT LEADERSHIP 2.1.1
The cams at present universally used in stamp mills lift the tappets with an involute form of curve, to which the surface of the tappet
The low cost of mining was the principal consideration, since, with mercury’s price per pound, the total gross value of the ore did not exceed