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RI 8524 Electrowinning Zinc From Zinc Chloride in Monopolar and Bipolar Fused-Salt Cells
By S. D. Hill
To help insure the continued viability of the minerals and materials sector of the U.S. economy, the Bureau of Mines is conducting research and disseminating technology that will result in more effici
Jan 1, 1981
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OFR-65-85 Recommendations For Minimal Luminance Requirements For Metal And Nonmetal Mines
By J. O. Merritt
The primary objective of this research program was to recommend ranges of minimum luminance for safety in underground metal and nonmetal mining. Visual tasks critical to safety were identified and ran
Jan 1, 1983
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IC 7285 Geophysical Abstracts 116 January-March 1944 - 1. Gravitational Methods
7253. Arkhangelsky, A. D. Geological Results of the General Magnetometric and Gravimetric Surveys of the U.S.S.R. (in Russian). Internat. Geol. Cong., Rep. of the 17th Sess., Moscow-Leningrad, 1937, v
Jan 1, 1944
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RI 9210 - Hydrometallurgical Recovery of Critical Metals From Hardface Alloy Grinding Waste: A Laboratory Study
As part of the Bureau of Mines program to reduce U.S. reliance on foreign suppliers of strategic and critical metals, research was conducted to improve technology for the recovery of critical metals f
Jan 1, 1988
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RI 4569 Relative Reducibility Of Some Iron Oxide Materials
By E. P. Barret
Differences in the reducibility of iron oxide materials have been recognized for a long time. Limonites are deoxidized more readily than hematites, and unaltered magnetites are the most difficult to d
Jan 1, 1949
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Evaluation Of Deep-Seated Crib Block Fires And Direct Application Fire Suppression Agents
By M. A. Trevits, J. E. Urosek, A. C. Smith, M. P. Valoski
Unlike other types of mining accidents, where an incident generally involves only a few workers, the danger of a mine fire extends to every person working in the underground environment. Mine fires ca
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RI 7962 In Situ Determination of Rock Behavior by Overcore Stress Relief Method, Physical Property Measurements, and Initial Deformation Method
By Eugene H. Skinner
This Bureau of Mines report describes the fieldwork and subsequent analysis to determine physical properties, stress distribution, and several aspects of rock behavior as a necessary evaluation for a
Jan 1, 1974
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OFR-112-81 Evaluation Of Proximity Warning Devices
By T. C. Green
A two-phase program evaluated commercial proximity warning devices and then served to design and develop an automatic electrostatic field strength measurement device with improved performance. The Pha
Jan 1, 1981
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RI 5805 Development Of A 10,000-Ampere Cell For Electrorefining Titanium ? Summary
By F. P. Haver
The Federal Bureau of Mines developed a 10,000-ampere cell to determine the economic feasibility of producing high-purity electrolytic titanium from mill scrap or offgrade sponge. Operating variables
Jan 1, 1961
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RI 3320 Diesel Mine Locomotives - Development And Use In European Coal Mines ? Introduction
By George S. Rice
In response to numerous requests for information as to the status of internal-combustion mine locomotives of the Diesel type that use heavy or non- volatile oil for fuel, with special reference to the
Jan 1, 1936
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RI 4330 Concentration of Oxide Manganese Ores from the Aguila District, Arizona
By D. T. Holmes, W. G. Sandell
"INTRODUCTION Three representative lots of ore wore obtained from the Aguila minim district in Arizona during the Bureau's exploration of manganese deposits there. Since only selectively mined ore fro
Aug 1, 1948
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OFR-47-77 Reducing The Operator Sound Level Of A Mining Service Vehicle - A Demonstration Project
By G. G. Huggins
A demonstration project has been completed to reduce the operator sound level of an underground service vehicle, a personnel dispatch wagon, to go dB(A) or less. The program objective was to implement
Jan 1, 1975
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RI 4199 Reduction of Phosphorus Content in Iron Ore and Concentrate from Iron Mountain, Mo.
By H. Kenworthy
"INTRODUCTION ..Although the occurrence of iron ore in Missouri was recognized by Marquette as early as 1673, the first known mining and smelting operation was conducted in 1815. This operation was ne
Feb 1, 1948
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IC 8796 Cost Of Producing U308 From Ammonium Bicarbonate In Situ Leach Solution By The Multiple-Compartment Ion-Exchange System
By Masami Hayashi
The Bureau of Mines estimated the cost for ,3 uranium ion-exchange recovery system using five grades of 17.0, leach solution producing 815,570 pounds of U 0? per year from an ammonium bicarbonate in s
Jan 1, 1979
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RI 7998 - Noise Abatement Of Pneumatic Rock Drill
By C. R. Summers, J. N. Murphy
In response to the Coal Mine Health and Safety Act of 1969, mandatory noise standards have been developed that specify time-noise limits of mine personnel exposure. Most affected by elevated noise lev
Jan 1, 1974
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OFR-46-77 Propagation Of Radio Waves In Coal Mines - I. Executive Summary - A. Objective
By Robert L. Lagace
The objective of this task was to perform theoretical analyses related to identifying and increasing the understanding of wireless propagation mechanisms in mines, and for predicting the performance r
Jan 1, 1975
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OFR-76-80 The Application Of Advanced Mine Air Monitoring Techniques To Mines Using Diesel Powered Equipment
By John H. Johnson
White Pine Mine section designated for exhaust emissions studies. The MTU Mine Air Monitoring Laboratory was used to gather temperature and C02 concentration data at 10 locations. The data substantiat
Jan 1, 1979
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IC 8120 Columbium And Tantalum - A Materials Survey ? Introduction And Summary
By William R. Barton
COLUMBIUM (niobium) and tantalum are similar refractory metals with closely related properties and uses and close association in ore deposits. Until recently both metals, particularly columbium, were
Jan 1, 1962
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RI 7596 Hydraulic Fracturing Of Wyoming Green River Oil Shale: Field Experiments, Phase I
By H. E. Thomas
[The Bureau of Mines has conducted a field hydraulic fracturing experiment to determine the preferential orientation of induced fractures in oil shale at a depth of about 400 feet in the Green River B
Jan 1, 1972
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RI 2833 Some Methods Of Producing Flowing Wells On The Salt Creek Field And Their Effect On Gas-Oil Ratios
By K. B. Nowels
"INTRODUCTION For the last several years the oil industry has been turning more and more toward conservation arid the study of related production problems. It is generally conceded that ultimate recov
Oct 1, 1927