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A Clear Path Through the Permitting ForestThe Colorado Joint Review Process (JRP), a bold step to expedite energy and mineral projects, is off and running. Blazing the trail is Amax Inc., which serve as guinea pig in JRP's development an
Jan 7, 1980
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Mine LanpsMan’s search beneath the earth for minerals has always required light, and the devices used to provide illumination have been both innovative and unusual —from stone vessels holding fat and a wick of
Jan 7, 1980
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Reducing Energy Demand on DraglinesRising energy costs are a growing concern among mine operators. At sur’ace operations, the size of a dragline, production requirements, pit geometry and layout, and operator skill are all factors in p
Jan 7, 1980
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Continuous Mining Equipment Cuts Costs at Waste Storage ProjectBy Charles S. Phillips
Kaiser Aluminum and Chemical Corp. (KACC) had been discharging spent bauxite-generally referred to as red mud-into the Mississippi River for almost 20 years when, in 1972, it agreed to store the waste
Jan 7, 1980
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Improved Communications IncreaseCoal Output by 20%The American Mining Congress International Coal Show, this year’s largest gathering of coal industry leaders, convened May 5-8 in Chicago. Against a 73 000-m2 backdrop of the coal industry’s most pro
Jan 7, 1980
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Hydrometallurgy May Rejuvenate Historic Boleo DistrictBy Earl Sackett
In its 110-year history as a mining camp, the Boleo copper district of Baja California has weathered significant changes in its operation, ownership, and profitability, despite an inhospitable environ
Jan 7, 1980
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The Geotechnical Engineer’s Role in Waste DisposalDisposal of solid and liquid wastes from mining and milling operations has become a focus of attention in recent years. Consequently, the geotechnical engineer is more frequently associated with desig
Jan 7, 1980
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The Bureau Rebounds From a Disastrous DecadeThroughout the 1970s, the US Bureau of Mines rode an ebb tide in Washington political circles. In rapid fire succession, the agency lost its mine health and safety enforcement responsibility (1973),
Jan 6, 1980
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New Opportunities for Energy Development on Indian ReservationsBy Daniel H. Israel
Indian tribes own a substantial portion of the West's minerals. More importantly, Indian reservations contain coal, oil and gas, uranium, and oil shale reserves in unusually large and unencumbere
Jan 6, 1980
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An Evaluation Of Leaky Feeder Communication In Underground MinesBy Howard C. Turnage, Dana T. Updyke, Wayne C. Muhler
The objective of this project was to develop technical data and evaluate performance and utility of leaky feeder communications systems currently used in North American underground mines. The desired
Jan 6, 1980
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How to Handle, Store and Install Conveyor BeltingBy J. L. Marchese
Belt conveyors face their applications life with a promise of constant abuse: heavy and rough products cascade onto the belting without let-up; caustic and abrasive materials such as salt and ore eat
Jan 6, 1980
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Driving Molycorp’s Conyeyor Decline at QuestaBy D. R. Shoemaker, H. W. Judges
A 16.5-kt/d underground molybdenum mine is being developed at Questa in northern New Mexico by Molycorp Inc., a wholly-owned subsidiary of Union Oil Company of California. The new $200-million undergr
Jan 6, 1980
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How to Size Smooth Roll CrushersBy Adam Zanker
Smooth roll crushers are widely used as secondary crushers, operating most effectively when set for size reductions in a ratio between 3 or 4 to I. The feed supplied to these units varies from 13 to
Jan 6, 1980
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Induced Fluorescent Sorting Technique Holds PromiseBy R. C. Beers, R. J. McKinley, R. D. Stewart
Preliminary test results at Occidental Research Corp.’s Irvine, CA, research facility indicate the viability of a new induced fluorescent sorting technique for preconcentration of limestone, coal, an
Jan 6, 1980
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Mineral Processing—Responding to Economic and Environmental PressuresBy A. English, Edward Martinez, L. A. Haas, N. W. Johnson, Harrison Copper, M. E. Tawil, C. C. Harris, G. V. Jergensen, D. Halbe, M. P. Amsden
Declining US ore grades along with skyrocketing energy, materials, labor, and regulatory costs underscored the urgency for technological innovation in the mineral processing area. Re¬liance on the sca
Jan 5, 1980
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A Disappointing Year for Industrial Minerals ProductionA glance at the accompanying table reveals that for the first time in many years the industrial minerals field did not post significant gains in production. Gypsum, cement, sand and gravel, and cru
Jan 5, 1980
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Coal - Still Waiting at the AlterBy J. L. Schroder, William J. Halvorsen, Wiliam W. Lyons, Kent C. Ware, Sheridan A. Glen, Donald C. Simpsom
The prospects for near-term growth in coal demand are exceptional: the federal government recently targeted 141 oil- and gas-fired generating units for mandatory conversion to coal; coal-to-synfuel de
Jan 5, 1980
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Mining—Technological Achievements Mark the DecadeBy M. P. Adamson, Bryson D. Trexler, R. V. Ramani, Mark L. Koenig, V. Rajaram, Alan Burton, C. S. Crocker, Kim. Y. C., A. G. Law, William C. Larson
Another record year vas experienced by the mining industry as the value of nonfuel minerals production soared to $23.5 billion-up 15% from the previous year. Based on preliminary estimates by the Bure
Jan 5, 1980
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Exploration:Uranium Holds the Spotlight - 1979 Annual ReviewBy M. Dean Kleinkopf, John Callahan, William M. Shepard, R. N. Schnepfe
Despite lower prices and the uncertain future of nuclear power, uranium continued to be the big attraction in 1979 exploration activity. Uranium again dominated exploration programs across the US-not
Jan 5, 1980
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The Bureau Rebounds From a Disastrous Decade - The Bureau Rebounds From a Disastrous DecadeThroughout the 1970s, the US Bureau of Mines rode an ebb tide in Washington political circles. In rapid fire succession, the agency lost its mine health and safety enforcement responsibility (1973), a
Jan 4, 1980