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By William E. Ford, Edward Salisbury Dana

WheweUite. Calcium oxalste CaCz04.Hz0. In small colorless monoclinic crystals. Optically +. j3 = 1.555. From haxony, with coal; also from Bohemia, and Akace. Oxammite. Ammonium oxelate, (N&)rC20r.2HzO. From the guano of the Gudape Isbnds, Peru.

Jan 1, 1922

This paper shows how small calculators can be used for ball mill simulations. Two calculations are examined, the first to calculate the mill parameters and the second to predict the mill product. In the case of small programmable calculators the programs for two common models are given.

Jan 1, 1976

By Frederick R. Cosgrave

Blasting near buried Natural Gas pipelines has always been an area of great concern. Given the many variables that the blaster must contend with in determining how to break the rock while trying to keep the vibration low and doing so while not compromising the pipeline.

Jan 1, 1995

By David E. Siskind

In the early 1980's, the Bureau of Mines published four reports of structural response and damage from surface mine blasting, vibration monitoring, and analysis methods. These findings replaced simpler and less restrictive Bureau criteria dating back to 1962 for ground vibration and 1943 for airblast.

Jan 1, 1991

By L. R. Plitt, M. K. Kim

The collecting properties of the fatty acid type collectors for barite were studied using zeta potential measurements, infrared spectroscopy, and Hallimond tube flotation tests. Based upon the experimental results, an adsorption model has been formulated which emphasizes the predominant role of the hydrocarbon chain in collector adsorption.

Jan 1, 1975

By Harris HR

This paper documents the selection, installation and performance of six, seventeen cubic metre, Dorr-Oliver flotation cells for primary zinc flotation at the North Mine in Broken Hill. The cells were installed to replace fifty, small cells, and despite initial design problems, have per- formed satisfactorily.

Jan 1, 1988

By J. P. Kirsch

This paper sets out to clearly identify all elements that make up an effective furnace feed system. These are outlined and the more common types of technology are listed. These technologies all play an important role in the final delivery of all feed materials to the furnace.

Jan 1, 2008

By M. T. Atwood, L. Goodfellow, S. W. Tyson

This paper reviews various methods for measuring the product output from oil shale processes. These include comparison with Fischer assay product yields, measuring conversion of feed oil shale organic carbon to volatile products, and measuring output of combustion energy in the form of product liquid and gas.

Jan 1, 1984

By K. Osseo-Asare

The thermodynamics of solid-aqueous solution equilibria up to 200°C In the systems Me-NH3 H2 0 (Me=Cu, Ni, Co) are summarized with predominance area diagrams generated with the DIAGRAM computer program. The implications of the diagrams to ammonia hydrometallurgy are discussed.

Jan 1, 1981

By Robert W. Hunt

Having had some twenty years' experience in trying to make good Bessemer steel rails, and now devoting my thoughts and energies to seeing that other people seek the same end, I venture to lay before the Institute some of the conclusions deduced from my practice and observation.

Jan 1, 1889

The paper describes the reasons for the development and for the selection of systems which were finally adopted; further estima- tion and design engineering problems, as well as experience with large screens in operation. Advantages, disadvantages and the final li- mits of screen dimensions are indicated.

Jan 1, 1984

By Gh. Crutu

During exploration and exploitation of complex ores, waste dumps that contaminate severely the environment and in particular soils and waters, are genetated. The most hazardous pollutants are heavy metals and metalloids (e.g As, Mo, Pb and Cu) as well as radionuclides (e.g U and Ra).

Jan 1, 2008

By Dennis J. Appelhans

Lac Minerals Bullfrog conducted research and testwork to find an environmentally acceptable alternative to lead for fire assaying. The result of this work was the substitution of bismuth for lead in all fire assaying performed at the Bullfrog Mine. The environmental and economic ramifications of this discovery are highlighted.

Jan 1, 1993

On Friday, 18th April, 1986, Stefen Kenneth de Kok passed away peacefully at his home in Johannesburg after a short illness. New President of FSPE Mr R.G. (Bob) St Leger took office as President of The Federation of Societies of Professional Engineers on 1st July, 1986.

Jan 1, 1986

By B J. Kennedy, G W. Sengstock

During the last two decades, many advances have been made in open cut coal mining technology as new mines have come on stream and old mines have faced increasingly difficult mining and operational conditions. The need for close control of operating costs has necessitated consideration of modified excavation methods.

Jan 1, 1995

By Robert Hopler

In part four, the instrumentation used to detect the vibrations from the 1876 Hell Gate (East River, New York) reef-clearing blast was discussed. The apparatus consisted of cups of mercury and microscopes or other magnifying instruments to detect ripples or waves on the surface of the liquid metal.

Jan 1, 2007

By G M. T, M Zh Bitimbayev, F K. Shadiyev

In the paper a complex problem was formulated for studying and establishing an effective and safe technology of selective underground leaching of useful components from polymetallic ores. Solving this problem will allow increasing technical and economic efficiency, technological and ecological safety of mining of useful minerals of polymetallic deposits.

Jan 1, 2003

PAPERS : 1 COMPUTER AIDED DESIGN OF MINE WATER MANAGEMENT - Z KESSERU 2 THE HYDROGEOLOGICAL PROBLEMS OF GROUNDWATER PROTECTION IN MINING REGIONS - V A MIRONENKO 3 WATER MANAGEMENT OF THE MAE MOH PROJECT -òò SIRI CHITCHOB 4 WATER MANAGEMENT AND WATER TREATMENT AT GOLDPN CROSS - M P A WILLIAMS

Jan 1, 1988

By Robert W. Hunt

At the Atlanta Meeting of the Institute, October, 1895, I had the honor of presenting a paper on " Specifications for Steel Rails of Heavy Sections Manufactured West of the Alleghenies,"* in which, reasoning from the experience of Western railroads with the heavier-sectioned steel rails, I called atten-

Jan 1, 1898

[Officers and Committees of the Society of Petroleum Engineers 1 Officers and Staff of the AIME 2 . Officers of AIME Sections Predominantly Petroleum in Membership 3 AIME Local Sections and SPE Regional Organization Maps 5 Alphabetical List of Members 7 Geographical List of Members 102 Advertisers' Index 133]

Jan 1, 1961