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
Table of ContentsImpurities in Zinc DustZinc OxideMetallic ImpuritiesOther ImpuritiesScreen Analyses of Zinc DustSubstitutes for Zinc DustConclusions The use of zinc dust for precipitating the precious
Table of ContentsAuxiliaries Actuated by Oil under 135 lb. PressurePressure on Low-pressure Cylinder Automatically RegulatedCondenser Operates under Severe ConditionsHoisting Speed 1,300 to 1,600 ft. per
Table of ContentsOld Haulage System UnsatisfactoryNew Plan Included Electric Haulage and Central HoistingElectric Haulage on Alternate Levels OnlyTrack is 20-in. GaugeDirect Current at 250 Volts
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
Table of ContentsReductionChargingReinforcement of TilingChange in FiringCondenser PlantCosts and Profits The low cost of mining was the principal consideration, since, with mercury’s price per pound, the
Last year this Institute was good enough to accept some remarks by the writer regarding sound steel, entitled Plant for Hadfield Method of Producing Sound