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  • SME
    A Clear Path Through the Permitting Forest

    The 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

  • SME
    Mine Lanps

    Man’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

  • SME
    Reducing Energy Demand on Draglines

    Rising 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

  • SME
    Continuous Mining Equipment Cuts Costs at Waste Storage Project

    By 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

  • SME
    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

  • SME
    Hydrometallurgy May Rejuvenate Historic Boleo District

    By 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

  • SME
    The Geotechnical Engineer’s Role in Waste Disposal

    Disposal 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

  • SME
    The Bureau Rebounds From a Disastrous Decade

    Throughout 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

  • SME
    New Opportunities for Energy Development on Indian Reservations

    By 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

  • NIOSH
    An Evaluation Of Leaky Feeder Communication In Underground Mines

    By 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

  • SME
    How to Handle, Store and Install Conveyor Belting

    By 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

  • SME
    Driving Molycorp’s Conyeyor Decline at Questa

    By 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

  • SME
    How to Size Smooth Roll Crushers

    By 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

  • SME
    Induced Fluorescent Sorting Technique Holds Promise

    By 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

  • SME
    Mineral Processing—Responding to Economic and Environmental Pressures

    By 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

  • SME
    A Disappointing Year for Industrial Minerals Production

    A 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

  • SME
    Coal - Still Waiting at the Alter

    By 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

  • SME
    Mining—Technological Achievements Mark the Decade

    By 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

  • SME
    Exploration:Uranium Holds the Spotlight - 1979 Annual Review

    By 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

  • SME
    The Bureau Rebounds From a Disastrous Decade - The Bureau Rebounds From a Disastrous Decade

    Throughout 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