BulletinSouth Dakota School of Mines and Technology., 1918 - Cyanide process |
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alloys aluminum anal analysis Anon anorg Black Hills Boulder County Bull carbon cassiterite Chem chim chromium Colorado Compt concentrated containing crucible crystals Deadwood Determination of tungsten dikes dolomite ductile Elec electric furnace feet ferberite ferro-tungsten filament lamps formed Geology gold granite graphite Harney Peak heating Hess high speed steel Hill City Homestake hubnerite hydrochloric acid hydrogen inches Inst intrusive iron limestone manganese masses metal filament metallic tungsten method Mining molybdenum muscovite occurrence of tungsten oxide pegmatites percent phosphorus phys powder pre-Cambrian Proc production pyrite quartz quartz veins quartzite reducing rend rhyolite rocks scheelite schists Separation of tungsten shale silica soluble solution South specific gravity sten surface Surv temperature thickness tool steel tourmaline Trans trioxide tung tungsten and molybdenum tungsten deposits tungsten minerals tungsten steel tungsten trioxide tungstic acid U. S. Geol wolfram wolframite wolframite occurs