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Performance Of A Soft Ground Tunnel On The Washington Metro
By Edward J. Cording, William H. Hansmire
INTRODUCTION The Washington Metro, a rapid transit system that will serve the District of Columbia, Virginia, and Maryland, has been under construction for about two years. Construction of the Metr
Jan 1, 1997
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IC 7944 Exploratory Drilling Practices And Costs At Western Uranium Deposits ? Introduction
By D. E. Redmon
Exploration of hidden mineral deposits becomes increasingly important as known ore reserves are depleted. The primary objective in any exploratory program is to obtain enough reliable information to e
Jan 1, 1960
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The Noranda Smelter
By W. B. Boggs
The Noranda smelter was built by Noranda Mines, Limited, from the designs of A. E. Wheeler, consulting metallurgist, New York, for the reduction of ores and concentrates from the Horne mine, and to tr
Jan 1, 1930
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OptimalSlope: a software determining optimal pitwall shapes of maximum Overall Slope Angles leading to increased financial returns and reduced mining carbon footprint
By Stefano Utili, Robert Pell, Nelson Morales, Cristobal Valderrama, Andrea Agosti, Guillermo Albornoz
The overall slope angle (OSA) of pit walls plays a crucial role in the financial return of open pit mines. The work showcases a novel design methodology where non-planar geotechnically optimal pit wal
Sep 30, 2022
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A Study of Polynary Uranium Mo-Zr-Nb-V Alloys
"In a continuing investigation into the development of uranium alloys for armament applications, some complex base alloy corn positions were modified by varying the amount of alloying elements and by
Jan 1, 1968
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Microbes and their Metabolites - Potential Iron Ore Flotation Reagents
By R Dwyer, S Rea, W J. Bruckard, N McSweeney, R Holmes
"The innate ability of microorganisms to adapt to changing or inhospitable environments has often been exploited for industrial purposes and forms the basis of many current biotechnological processes.
Aug 12, 2013
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High Temperature PDX of Precious/Base Metal Concentrates from Newmont's Phoenix Project, Using Controlled Precipitation of Sulphate Species to Enhance Silver Recovery
By J. C. Gathje
Newmont acquired the Phoenix Project through the acquisition of Battle Mountain Gold in 2000. Shortly after the acquisition, Newmont Metallurgical Services (NMS) and Nevada Operations began developmen
Jan 1, 2004
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RI 6950 Thermodynamic Properties Of A Van Der Waals Fluid In The Two-Phase Region
By Robert E. Barieau
General expressions for evaluating various thermodynamic properties applicable to the van der Waals equation of state have been derived. These formulas were subsequently used to evaluate various therm
Jan 1, 1967
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RI 6677 Freezeproofing Lignite
By Robert C. Ellman
The Bureau of Mines investigated the factors that cause agglomeration of lignite by freezing during winter shipment and sought methods to avoid it. Tests showed that lignite may be freezeproofed by re
Jan 1, 1965
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RI 4276 Investigation Of Meta-Anthracite In Newport And Providence Counties, R. I.; Petrography, Chemical Characteristics, And Geology Of Deposits
By Albert L. Toenges
The fuel requirements for industrial and domestic consumers in New England, in normal times, are supplied almost entirely by fuel oil, anthracite, and bituminous coal. A shortage of these fuels occurr
Jan 1, 1948
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Study on the effects of scrubber operation on the face ventilation
For the past four years, the Department of Mining Engineering at the University of Kentucky has conducted a validation study of the CFD Fluent code, by comparing its results against mining-related ben
Jan 1, 2009
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The Behavior Of Calcium Sulphate At Elevated Temperatures With Some Fluxes
By H. 0. HOFMAN AND W. MOSTOWITSCH
I. INTRODUCTION. THE mineral gypsum, CaSO, + 2 H2O, has been used for many years as a sulphurizing and basic flux in several smelting¬operations. Thus, in smelting oxide nickel-ore in the blast furna
Jan 1, 1909
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Variable speed SAG milling
By M. N. Brodie
"The ability to adjust the speed of a SAG mill offers benefits to the process and to equipment maintenance. It can be provided with some slight effect on availability ranging from somewhat enhanced to
Jan 1, 2003
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Optimal Grade Control Using Geostatistics And Economics: Methodology And Examples (0cbcdec1-207d-4fc8-8d49-cd716d6fcdc7)
An important problem in mine operations is the classification of material as waste, low-grade stockpile, and ore. This classification must often be made with blasthole data that are widely spaced and
Jan 1, 1999
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Creep Along Weak Planes In Roof And How It Affects Stability
By M. K. Larson, R. G. Wade
Researchers at the National Institute for Occupational Safety and Health (NIOSH) are studying the time-dependent response of rock stressed along weakness planes. The objective is to improve mine safe
Jan 1, 2000
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New Zealand Gold Mining: Past, Present and Future Trends
By D J. Holden
Prospectivity, the relative value of gold, investor confidence, general economic stability and legislation driven by public attitudes are seen as the major influences on the gold mining industry in Ne
Jan 1, 1992
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Waste Management and Energy Savings through Extraction of Valuable Metals: Copper, Nickel and Cobalt from Sulphidic Tailings of Golgohar Iron Mine, Iran
By M. Askari, A. Ahmadi
"This study was conducted to establish the possible application of bioleaching in the pilot scale to recover valuable metals from the sulfidic tailings of Golgohar Iron Mine (Kerman, Iran). Using biol
Jan 1, 2017
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Rare Metals and Minerals ? Many New Uses ? Big Rise in Output of Beryllium, Calcium, Molybdenum, Radium ? Tungsten Scarce
By Frank L. Hess
BERYLLIUM is demanding more of the limelight, and the output of beryllium copper (containing 2% to~ 3 per cent of beryllium) seems to have grown 60 per cent above that of 1936, which was double that o
Jan 1, 1938
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The Truths And Myths Of Freeze Lining Technology For Submerged Arc Furnaces
By P. L. Duncanson, J. D. Toth
Since 1995, when "freeze lining" refractory systems were introduced to the ferroalloy industry, they have gained in popularity, due to the freeze lining?s reputation for reliability, safety, and the c
Jan 1, 2004
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A Retrospective Assessment of Longwall Roof Support with a Focus on Challenging Accepted Roof Support Concepts and Design Premises
By Thomas M. Barczak
The era of the shield-supported longwall face began in the United States a little over 25 years ago. The most fundamental development of the shield in the past 25 years has been an increase in size a
Jan 1, 2006