Table of ContentsPower Electric Mining Shovel & Dragline PitsEngineering Estimates Power Electric Mining Shovel & Dragline Pits The determination of mining and stripping limits prior to undertaking exploitation by power-shovel methods requires careful
Table of ContentsElectric shovelsElectric locomotivesTrolley-wire system When most people think of shovels they think about the type of shovel used for metal detecting and general
Table of ContentsDescription of Apparatus UsedDescription of the Miner’s LampsConditions of TestIlluminantsConclusions While electric lamps both of the cap and hand type are being introduced
The four major steps in the production of marketable copper are mining, concentrating, smelting, and refining. In a few instances, however, leaching takes the place
Table of ContentsThe Anticlinal TheoryThe Hydraulic TheoryThe Diastrophic TheoryRock PressureHow Capillary Pressure Seals an Oil Pool The writer has devoted a number of years to
The accompanying chart has been drawn for the convenience of engineers as a means of quickly determining the correct number of plies of conveyor belts
In view of the circumstance that very few important changes have been made within the last 15 or 20 years in the equipment of rod
Table of ContentsGold Ore ProcessingTypes of Gold OresMethods of Ore TreatmentAmalgamationConcentrationCyanidationGold-Milling Data In this bulletin the subject of ore dressing is approached from the economic
The following conclusions on the work of the Hardinge mill are based on data furnished to the writer by the Hardinge Conical Mill Co. in
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.