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  • NIOSH
    A Continuous Dielectric Separator For Mineral Beneficiation - Objective

    To separate complex mineral mixtures according to their dielectric properties. Approach Develop a laboratory-scale continuous dielectric separator to separate mineral mixtures by exploiting their

    Jan 1, 1981

  • NIOSH
    Mineral Dust and Diesel Exhaust Aerosol Measurements in Underground Metal and Nonmetal Mines

    By Bruce Cantrell, K. L. Rubow

    "INTRODOCTIONMeasurement of the contribution of diesel exhaust to respirable aerosol in mine environments has become increasingly important because of current concerns over the occupational health eff

    Jan 1, 1990

  • NIOSH
    RI 4858 Electrical Conductivity And Density Of Fused Binary Mixtures Of Magnesium Chloride And Other Chlorides

    By R. W. Huber

    While conducting an investigation on electrolytic reduction of magnesium oxide in 1943, it became necessary to obtain accurate data on the conductivity and density of various mixtures of fused chlorid

    Jan 1, 1952

  • NIOSH
    RI 3388 Control Of Dust From Blasting By A Spray Of Water Mist ? Introduction (d5f28a11-9adb-4cd8-adb1-62f58a19c93a)

    By Carlton E. Brown

    [The purpose of this report is to present results of tests on the effectiveness of a spray of water mist, commonly called compressed-air water blast or water blast, in reducing the concentration of du

    Jan 1, 1938

  • NIOSH
    RI 7023 Electrodeposition of Iridium From Fused Sodium Cyanide and Aqueous Electrolytes ? A Preliminary Study

    By R. L. Andrews

    The Bureau of Mines investigated means of electrodepositing iridium to form thick coatings suitable for the protection of such metals as tungsten and molybdenum, which oxidize rapidly at high temperat

    Jan 1, 1967

  • NIOSH
    RI 8530 An Evaluation of Used Aluminum Smelter Potlining as a Substitute for Fluorspar in Cupola Ironmelting

    By V. R. Spironello

    The Bureau of Mines is conducting studies of the slags related to ferrous technology to evaluate acceptable substitutes for the auxiliary flux, mineral fluorspar, in foundry operations. This work is d

    Jan 1, 1981

  • NIOSH
    RI 2170 Recovery of Gold from Black Sand Tailings

    By John Gross

    The Alaska Station of the Bureau of Mines has recently conducted tests on two tailings from black sand which had been treated previously at the Station. The results of this previous treatment have be

    Oct 1, 1920

  • NIOSH
    RI 8375 Grouting Horizontal Drainage Holes in Coalbeds

    By George N. Aul

    This report describes a method developed by the Bureau of Mines for sealing horizontal degasification holes so that they do not create a gas explosion hazard when intercepted by mining. A cement slurr

    Jan 1, 1979

  • NIOSH
    RI 6601 Extraction And Separation Of Rare-Earth Elements And Yttrium With Dodecyl Phosphoric Acid-Kerosine Solvent

    By J. G. Eisele

    Solvent-extraction characteristics of dodecyl phosphoric acid (DDPA) were investigated to determine its potential as a fractional or selective extract-ant for individual elements in a rare-earth-yttri

    Jan 1, 1965

  • NIOSH
    IC 7162 Utilization Of Manganese In The Steel Industry

    By B. A. Rogers

    The problem of obtaining enough manganese for use in the manufacture of steel appears likely to recur when international relationships are disturbed and to become serious at any time when the United S

    Jan 1, 1941

  • NIOSH
    RI 2990 Grinding And Classification - II. Batch Closed-Circuit Grinding ? Introduction

    By A. W. Fahrenwald

    The logic leading to the development of the experiments in this paper already has been stated in Part I,3 but is briefly as follows: The results of the batch-grind experiments in which time of "grind"

    Jan 1, 1930

  • NIOSH
    IC 6599 Quarrying Methods And Costs At The Sloan Quarry Of The United States Lime Products Corporation, Sloan, Nev. ? Introduction

    By R. E. Tremoureux

    This paper describing the methods and costs of quarrying limestone at Sloan, Nev., is one of a series of similar papers being prepared for and published by the Bureau of Mines on this industry in the

    Jan 1, 1932

  • NIOSH
    RI 6842 Yield And Ultimate Strengths Of Rock Bolts Under Combined Loading

    By Lars Osen

    The Bureau of Mines investigated (1) the effect of torsion on yield and ultimate strengths of bolts when the torsion is applied first and tensile load is applied independently of torsion and (2) vario

    Jan 1, 1966

  • NIOSH
    RI 2420 Experiments On Back Pressure On Oil Wells

    By T. E. Swigart

    In the production of oil end gas, engineering methods have been applied less than in any other branch of the oil industry. While refineries, gasoline plants, pipe-line and other transportation systems

    Jan 1, 1922

  • NIOSH
    RI 7857 Potential Uses for 400-Hz Electrical Power Systems in Mining

    By G. J. Conroy

    This Bureau of Mines study was initiated to determine whether or not a large-scale investigation of 400-Hz applications in coal mines was justified as a means of increasing safety in operations due to

    Jan 1, 1974

  • NIOSH
    Evaluation of the Size Distribution of Large Aerosols in an Animal Exposure Chamber

    By D. Hinton, M. McCawley, R. C. Lantz, F. Pisano, C. Stanley

    "INTRODUCTION Aerosols (5 um have not been shown to be consistently generated and characterized in inhalation chambers. Particle deposition in the lungs however may occur with particles as large as 25

    Jun 1, 1988

  • NIOSH
    Reservoir Engineering Considerations For Coal Seam Degasification And Methane Control In Underground Coal Mines

    By C. Özgen Karacan

    Degasification and methane control in underground coal mining is an important area augmenting conventional ventilation in order to prevent possible fires and explosions due to excessive methane emissi

    Jan 1, 2009

  • NIOSH
    RI 8902 - Effect of Clay Stabilizers on Permeability of Clayey Ore

    By Kenneth E. Hjelmstad

    In situ leach mining operations often encounter difficulty maintaining adequate leach solution flow into the are formation. Swelling and dis-persion of clay particles in the formation are often respon

    Jan 1, 1984

  • NIOSH
    IC 7329 Hydrogen Sulfide Poisoning As A Hazard In The Production Of Oil ? Introduction

    By Sara J. Davenport

    Hydrogen sulfite has been listed (1)3/ as a possible hazard in 50 occupations, many of which are in the mineral industries. The effects of its occurrence in the petroleum industry made themselves felt

    Jan 1, 1945

  • NIOSH
    RI 4558 Investigation Of The Abbott Quicksilver Mine, Lake County, Calif.

    By Frank J. Wiebelt

    Work on the Abbott-quicksilver property was part of the general program of th~ Bureau of Mines in its investigation of domestic mineral resources, which are essential to national defense or industry a

    Jan 1, 1949