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OFR-94-77 Study Of A Water Jet Continuous Coal Mining System
By P. J. G. du Toit
Coal has been mined by hydraulic means in various countries, i.e., the hydraulic excavation as well as the hydraulic transportation of coal has been practiced. The hydraulic breaking (excavating) of t
Jan 1, 1977
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Fluidized Bed Roasting Of Micro-Pelletized Zinc Concentrate: Part I?Pellet Strength And Roasting Kinetics - Synopsis
By S. Heukelman
Zinc or, a zinc refinery in South Africa, uses oxygen enrichment of up to 26% O2 in its fluidizing air to increase concentrate-throughput in its fluidized bed roasters. The aim of the study is to dete
Jan 1, 2011
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Viscoplastic behaviour of and damage to rock related to the design of underground waste depository cavities
By A. Bouvard, N. Hoteit, E. Boidy, F. Pellet
In the context of the construction of an Underground Research Laboratory devoted to the feasibility studies of radioactive waste deposits, it appears of the utmost importance to study the long-term be
Jan 1, 2003
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RI 7320 The Sysrem Al4C3-AlN-Al203 - Powder Forming And Sintering Behavior, Phase Identification, And Refractory Composition Properties
By Jack L. Henry
The ternary system A14C3-AIN-Al203 has been examined to determine compositions which may display desirable high-temperature refractory properties. Powder methods were employed in the synthesis of all
Jan 1, 1969
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IC 7257 Geophysical Abstracts 113 April-June 1943 - 1. Gravitational Methods
6889. Aslakson, C. I., and Swick, C. H. Gravity Observations in Peru and Colombia. Coast and Geodetic Survey,-Special Pub. 233, U. S. Government Printing Office, Washington, D. C., 1943, 18 pp. (Price
Jan 1, 1943
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Progress in Furnace Refractories
By John D. Sullivan
A DISCUSSION of the developments of the past decade in the field of refractories, and the effect of these developments on the performance and life of open-hearth furnaces, is perhaps best introduced b
Jan 1, 1936
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The Aurora Super Pump – Part II: Field Performance of a New Hydrotransport Pump
By D. Wolfe, R. Cleminson
"The Aurora North mine has been operating for more than ten years, and is the source of over half of Syncrude’s bitumen production. The hydrotransport systems at Aurora experience high rates of wear,
Jan 1, 2014
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Impacts Of Ground Convergence On TBM Performance In Ghomroud Tunnel
By Ebrahim Farrokh
Ghomroud water conveyance tunnel project is under construction using shield Tunnel Boring Machines (TBM) for a total length in excess of 50 km. Phase 1 of the project included 36 km of tunnel divided
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EFFC/DFI Best Practice Guide to Tremie Concrete for Deep Foundations, Edition 1
By EFFC/DFI Concrete Task Group
Concrete technology continues to advance rapidly and modern mixes with five components – cement, additions, aggregates, (chemical) admixtures and water – often have characteristics which differ signif
Jan 1, 2016
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Mineral Indicators - Aluminum (fba062f0-b758-4019-a907-98a7ea196baa)
Since mid-July, most domestic producers have been marketing 99.5 percent unalloyed aluminum ingot at 53-57 cents per pound. Dealers in the United States have recently quoted ingot at 52.3-52.8 cents.
Jan 1, 1978
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Canadian Clean Power Coalition Project: The evaluation of options for CO2 extraction from existing and new coal-fired power plants
By D. du Plessis, R. Stobbs
The Canadian Clean Power Coalition (CCPC) was created in 2001 to protect and enhance Canada’s vast coal and other carbon-based resource wealth, and to ensure that environmental public policy decisions
Jan 1, 2006
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New Opportunities - Exhaustive Monitored Copper Coolers For Submerged Arc Furnaces
By M. Hopf, E. Rossouw
Keywords: Pyrometallurgy, furnace, copper coolers, freeze lining, monitoring, Saveway The use of water-cooled copper components as sidewall elements of submerged arc furnaces and other pyrometallu
Jan 1, 2006
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OFR-27-72 The Miner, His Job And His Environment: A Review And Bibliography Of Selected Recent Research On Human Performance ? Executives? Summary
By Charles Fried
The Coal Mine Health and Safety Act passed by Congress in 1969, called for research to alleviate the occupational stresses and hazards of coal miners. Spurred by a series of recent mine disasters the
Jan 1, 1972
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Las plantas de beneficio del Banco Minero del Perú
By Hernando Labarthe
"El siguiente texto describe la importancia de la actividad del Banco Minero en el Perú, a través de la instalación y operación de sus plantas de beneficios, como las ventajas, las instalaciones, orga
Jul 20, 1956
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RI 4882 Volumetric Determination of Small Quantities of Uranium - With Special Reference to Errors Associated with Use of Jones Reductor (2b4914c2-e697-47ab-9da8-dccd8a6cadf8)
By Heber E. Peterson, Sill. Claude W.
"INTRODUCTION In the usual volumetric determination of uranium, the solution containing uranium is reduced in a Jones reductor, yielding a mixture of trivalent and tetravalent uranium; the trivalent u
Jun 1, 1952
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Design of Large and Shallow Caverns of New York Second Avenue Subway
By Verya Nasri
The proposed Second Avenue Subway Project in New York City is approximately 8.5 miles long, up to a depth of 120 feet beneath grade and runs the length of the eastern side of the island of Manhattan f
Jan 1, 2008
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Preparation of Potassium Ferrate by Hypochlorite Oxidation Method
By Guomin Jiang
Potassium ferrate is an excellent multifunctional reagent for wastewater treatment, but its preparation is crucial. The improved hypochlorite oxidation method was used to prepare potassium ferrate in
Jan 1, 2010
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Introduction (f021bf21-e10f-41e4-9b75-c54b8612d619)
Research 83 highlights significant studies conducted during the past fiscal year at Bureau facilities and offices. Readers who want more information about the projects and studies summarized here can
Jan 1, 1983
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Bulletin 129 The Fusibility of Coal Ash and The Determination of the Softening Temperature
By ALBERT E. HALL, Arno C. Fieldner, Alexander L. Field
As a safeguard against excessive clinker troubles, specifications for the purchase of coal can be drawn to include the "softening" or "fusing" temperature of the ash. The value of such information has
Jan 1, 1918
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IC 7328 Hazards Of The Trolley-Locomotive Haulage System In Coal Mines ? Introduction
By D. Harrington
The greatly extended use of the underground trolley-locomotive system for hauling coal without doubt was one of the most important factors in the rapid progress of coal mining and the increased produc
Jan 1, 1945