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Prereduced Iron Ore Pellets: Preparation, Properties, Utilization
By M. M. Fine
A process for simultaneously reducing and indurating iron are pellets was developed by Bureau of Mines laboratory research and confirmed on a continuous pilot plant basis. Moist iron are concentrate w
Jan 1, 1970
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RI 7659 Lowering The Tin Content Of Secondary Leaded Tin-Bronze By Replacement With Lead Or Zinc
By E. R. Cole
Laboratory heats of an 80 percent copper high-leaded tin-bronze alloy, similar to Brass and Bronze Ingot Institute (BBII) alloy 3A, were made with reduced tin content to determine whether an alloy com
Jan 1, 1972
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OFR-114-85 Development Of A Roof Competence Tester
By J. B. Czirr
MESA Corporation has completed a four-year program for the Bureau of Mines to develop a technique for measuring roof competence in underground coal mines. The preferred technique employs a tracer gas
Jan 1, 1985
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OFR-26-86 Development Of The Claw Hammer Scaling Tool
By James D. Eklund
Towards the goal of improving safety, economy and efficiency of scaling in underground metal/nonmetal mines, Battelle developed a combination prying/hammering scaling tool. A prototype was subject
Jan 1, 1983
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RI 7761 Physical Aspects Of Copper Cementation On Iron
By Walter W. Fisher
A study of copper cementation on iron was initiated to determine the effect that deposited copper has upon subsequent cementation. A microscopic investigation of cementation on an iron surface showed
Jan 1, 1973
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OFR-47(10)-83 Ecological Studies On The Revegetation Process Of Surface Coal Mined Areas In North Dakota - 10. Elements Of Macro- And Microclimate
By Richard H. Bares
The general or macroclimate of the study sites in western North Dakota is characterized by rapid and sometimes extreme daily and day-to-day temperature fluctuations, rainfall patterns which are errati
Jan 1, 1982
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OFR-83B-92 Hoisting System Components - Selection And Guidelines - Volume 2
The objective of this study was two-fold: 1. To perform a world literature search pertinent to the analysis, selection and design of hoisting systems and their components and to codify the search i
Jan 1, 1988
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RI 7902 Spark-Shower Radiance of Metal Grinding Sparks
By John E. Kelley
A method for measuring the spark-shower radiance of metals when abraded on a grinding wheel was developed by the Bureau of Mines for evaluating the sparking tendency of metals. The radiance was measur
Jan 1, 1974
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RI 7298 Effect Of Increasing End Constraint On The Compressive Strength Of Model Rock Pillars
By Clarence O. Babcock
Model pillars of limestone, marble, sandstone, and granite with length-to-diameter (L/D) ratios of 3, 2, 1, 0.5, and 0.25 (0.286 for granite) were tested to failure in axial compression to determine t
Jan 1, 1969
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OFR-130-81 Dust Control For Haul Roads
By Russel Bohn
The purpose of this study was to evaluate the various techniques far mine roadway dust control. This evaluation included (a) the types of dust suppressants available, (b) the interaction of these prod
Jan 1, 1981
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RI 7165 Miniature Bilevel Alarm For Oxygen-Deficient Atmospheres
By Robert A. Bradburn
The Bureau of Mines has developed a miniature, portable two-level oxygen-deficiency alarm and produced three prototype models. Each operates from a 4.2-v dc power source, and the highest current drain
Jan 1, 1968
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OFR-67-73 Permissible Automatic Data Acquisition System - Section I - Introduction
By G. P. Houston
This is the final, report submitted for the Contract No. H0220002 with the U. S. Bureau of Mines for the design and development of a Permissible Automatic Data Acquisition System (PADAS) to measure an
Jan 1, 1973
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IC 7930 Mining Methods And Costs At The Piokee Mining Unit And The Piokee Experimental Mining Project, The Eagle-Picher Co. (Tri-State Mines), Ottawa County, Okla. ? Introduction And Summary
By J. B. Elizondo
This paper, which describes mining methods and practices at the Piokee mining unit and the Piokee expertmental mining project of The Eagle-Picher Co. in northeast Oklahoma, is one of a series being pr
Jan 1, 1959
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OFR-80(2)-81 Selective Interburden Handling Techniques - Volume II - Appendices
By Robert L. Lappi
Eight interburden handling concepts are developed for multiple seam area mine stripping operations in central and western United States. They are based on data gathered and analyzed during field surve
Jan 1, 1980
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MLA 10-87 - Mineral Resources Of The South Jackson Mountains Wilderness Study Area, Humboldt County, Nevada
By Michael M. Hamilton
In 1984 and 1985 the U.S. Bureau of Mines performed a mineral survey of the South Jackson Mountains Wilderness Study Area covering 60,211 acres of mountainous terrain of Humboldt County in northwester
Jan 1, 1987
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RI 6025 Experimental Production Of Lightweight Basic Refractories
By M. E. Tyrrell
Lightweight basic refractories suitable for use in some sections of the all-basic furnace were developed. Potential advantages of such refractories are lower weight, improved resistance to thermal sho
Jan 1, 1962
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RI 8764 Velocity and Orientation Effects on the 10-mm Dorr-Oliver Cyclone
By Andrew B. Cecala
The Bureau of Mines conducted a brief laboratory study on the 10-mm diam Dorr-Oliver nylon cyclone to investigate (1) whether high wind speed (>300 ft/min), or sampler inlet orientation with respect t
Jan 1, 1983
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OFR-24(4)-84 Mining And Rock Mechanics Research In Oil Shale And Nahcolite, Horse Draw Shaft, Colorado - Appendix Volume A-2 Core Hole 1840-UG-3 Data
During the period 1979 thru 1982, Multi Mineral Corporation conducted a mining research program at the United States Department of the Interior's Bureau of Mines Oil Shale Mining Environmental Re
Jan 1, 1983
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OFR-113D-93 Coal Mine Injury Analysis: A Model For Reduction Through Training - Volume V: Mine Safety Management Case Studies
By R. V. Ramani
One area of study in the Coal Mine Injury Analysis project was to illustrate and enhance the ability o mine safety management personnel to apply analytical techniques to Injury experience data and to
Jan 1, 1993
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OFR-139-83 Leaching Of Bornite With Oxygen And Ferric Chloride As Oxidants
By Ferron A. Olson
Natural bornite (Cu5FeS4) leached in ferric chloride or in sulfuric or hydrochloric acid solutions with oxygen showed several differences. In ferric chloride 80 of the copper was leached in two stages
Jan 1, 1982