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  • NIOSH
    RI 2551 Distribution of Air in Metal-Mine Ventilation With Special Reference to Flexible Tubing Methods

    By D. Harrington

    "While distribution of air currents to working faces is a necessity in coal mines, especially those having explosive gas, advancing faces in metal mines rarely have circulating air other than the ordi

    Nov 1, 1923

  • NIOSH
    RI 4818 Concentration Of Oxide Manganese Ores From Black Rock, Kramer, And Morgan Cromar Properties, Tooele And Juab Counties, Utah

    By J. V. Batty

    In the course of the investigation of manganese mineral occurrences in the United States, Bureau of Mines examining engineers collected several lots of ore from the Black Rock, Kramer, and. Morgan-Cro

    Jan 1, 1952

  • NIOSH
    RI 4780 Concentration Of Oxide Manganese Ores From Lander County, Nev.

    By T. F. Mitchell

    As a part of the program of investigation of domestic sources of manganese ore, mining engineers of the Bureau of Mines examined and obtained samples of ore from two properties in the vicinity of Bett

    Jan 1, 1951

  • NIOSH
    Bureau Of Mines Mineral Investigations In The Juneau Mining District, Alaska, 1984-1988 - Volume 2.- Detailed Mine, Prospect, And Mineral Occurrence Descriptions - Section A - Haines-Klukwan-Porcupine Subarea ? Introduction

    By Jan C. Still

    The Haines-Klukwan-Porcupine subarea of the Juneau Mining District (JMD) is located in the northern portion of the JMD and consists of the land between the Alaska-British Columbia boundary, the Chilko

    Jan 1, 2012

  • NIOSH
    RI 6441 determining mine production schedules

    By D. E. Redmon

    Linear programing provides a mathematical technique by which activities can be planned in such a way that an optimal result is obtained. Routine applications of linear programing require only a knowle

    Jan 1, 1964

  • NIOSH
    RI 3306 Progress Reports - Metallurgical Division - 12. Annual Report Of The Metallurgical Division, Fiscal Year 1935 ? Introduction

    By R. S. Dean

    The function of the Metallurgical Division is to conduct investigations relating to the treatment of mineral products from the state in which they are mined to the refined metal or other unfabricated

    Jan 1, 1936

  • NIOSH
    Bulletin 163 Methods of Shutting Off Water in Oil and Gas Wells

    By F. B. TOUCH

    This bulletin deals with a topic that is exceedingly wide, and will doubtl~ be under consideration and discussion so long as there are enough known deposits of oil and gas remaining in the earth to ma

    Jan 1, 1918

  • NIOSH
    IC 8666 Proceedings Of The Symposium On The Use Of Diesel-Powered Equipment In Underground Mining, Pittsburgh, Pa., January 30-31, 1973 ? Introduction

    A symposium was held on January 30 and 31, 1973, at Pittsburgh, Pa., to review the state-of-the-art in designing and utilizing diesel-powered equipment in underground mining. The Health and Safety Act

    Jan 1, 1975

  • NIOSH
    RI 9025 - Recovery of Vanadium, Uranium, and Phosphate From Idaho Phosphorite Ores

    By J. C. Judd

    The Bureau of Mines investigated the recovery of vanadium, uranium, and phosphorus from low-grade phosphorite ores and concentrate by leach-ing with H2S04. Samples containing 0.12 to 0.23 pct V20S, 0

    Jan 1, 1986

  • NIOSH
    RI 6991 Lake Superior Iron Resources - Reexamination Of Nonmagnetic Taconite Occurrences In The Hibbing, Minn., Area By Flotation, Magnetic Separation, And Petrographic Methods

    By L. F. Heising

    Ten composite samples of Mesabi Range nonmagnetic taconite from the Hibbing, Minn., area were evaluated by flotation and by reduction roasting-magnetic separation to determine their potential as a fut

    Jan 1, 1967

  • NIOSH
    RI 3225 The Flotation Of Alabama Graphite Ores

    By B. W. Gandrud

    The upper part of the Alabama deposits of crystalline graphite consists of an oxidized ore derived from the underlying unoxidized ore through prolonged Weathering. The degree of oxidation in different

    Jan 1, 1934

  • NIOSH
    IC 7258 Strategic Mica ? Introduction

    By G. Richards Gwinn

    In modern warfare, mica is truly indispensable. Coordination of combatant units necessitates maintenance of intricate communications equipment, in the construction of which high-grade sheet mica is es

    Jan 1, 1943

  • NIOSH
    RI 4464 Sheath Working Of Metal Powders

    By J. R. Long

    The investigations described herein are concerned with a portion of a systematic research, by the Federal Bureau of Mines on ductile titanium. The Bureau's work on the metal has resulted in devel

    Jan 1, 1949

  • NIOSH
    IC 9295 Application Of Petrographic Techniques To Assess In Situ Leach Mining Potential

    By Susan Brink

    The U.S. Bureau of Mines is investigating the potential of in situ leach mining a variety of Cu, Mn, and Au-Ag ores. Geologic characterization of ore samples from laboratory leaching experiments is co

    Jan 1, 1991

  • NIOSH
    RI 9473 Use of Oxygen-Enriched Gas for the Oxidation of Acid and Fluxed Taconite Pellets

    By Larry A. Haas

    The U.S. Bureau of Mines, in cooperation with Cleveland-Cliffs, Inc. (Hibbing, MN), investigated ways of enhancing the quality (compressive strength, after-tumble and reducibility) of domestic acid an

    Jan 1, 1993

  • NIOSH
    OFR-33-82 Environmental Instrumentation In Mining Air And Water

    By Richard C. Moore

    The U.S. Bureau of Mines contracted a study to review the air and water monitoring requirements of five Federal environmental acts (the Federal Water Pollution Control Act, the Safe Drinking Water Act

    Jan 1, 1981

  • NIOSH
    RI 2239 Losses In Aluminum and Aluminum-Alloy Melting

    By Robert J. Anderson

    "Introductory Statement:In melting the nonferrous metals and alloys for foundry and rolling-mill work, even with the best practice, there is always a loss, due principally to oxidation. Melting losses

    Apr 1, 1921

  • NIOSH
    IC 7164 Mining Methods And Costs Of The Lava Cap Gold Mining Corporation, Nevada City, Calif. ? Introduction

    By John W. Chandler

    The property of the lava Cap Gold: Mining Corporation is in the Nevada City-Grass Valley mining district about 5 miles east of Crass Valley, Calif. At present (July 1940) the plant is mining end milli

    Jan 1, 1941

  • NIOSH
    RI 9428 - High-Temperature Cyanide Leaching of Platinum-Group Metals From Automobile Catalysts-Process Development Unit

    By R. J. Kuczynski

    The U.S. Bureau of Mines operated a 2,000-g (4.4-lb) batch process development unit for recovering platinum-group metals (PGM) from automobile catalysts. Virgin monolith, used pellet, and used monolit

    Jan 1, 2010

  • NIOSH
    RI 7411 Magnetic Roasting And Leaching For Upgrading Minnesota Manganiferous Iron Ores

    By H. D. Jacobs

    A process for recovering both iron and manganese from four manganiferous ores of the Cuyuna Range was evaluated. It comprised: (1) Low-temperature gaseous reduction to convert nonmagnetic iron mineral

    Jan 1, 1970