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Anthracite-Mechanization and Pillar Recovery
By H. Merton Ruth
THE northern anthracite fields, although facing the same economic problems as the southern fields, are confronted with the additional problem of fast dwindling reserves of anthracite which can be conv
Jan 1, 1950
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Iron and Steel Division - Oxygen and Sulfur Segregation in Commercial Killed Ingots
By W. M. Wojcik, R. F. Kowal
Oxygen and sulfur distributions in commercial, 5-ton ingots of killed, medium carbon steel are described. Oxygen distribution is found to vary with deoxidation practice. Irregular distribution of oxyg
Jan 1, 1965
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The N'Kana Smelter - Latest Ideas of Copper Metallurgists Are Embodied in New Northern Rhodesian Plant
By F. L. Bosqui, A. D. Wilkinson
EVEN though the world has not been crying for more copper for the last three or four years there has been some important mill and smelter construction. Discovery and development of large new high-grad
Jan 1, 1934
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A Computerized System for Using Response Surface Methodology to Evaluate Phosphate Flotation Variables
By J. E. Lawver, B. J. Clingan, R. E. Snow
Response surface methodology is a well-known and powerful technique for determining optimum conditions in flotation systems. One disadvantage is the onerous task of the numerical calculations and curv
Jan 1, 1980
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Gold and World Trade
By James R. Finlay
SOMETIMES the American Institute of Mining and Metallurgical Engineers appears to be a strictly technical society, and if so my paper should deal with the technical operations of finding and producing
Jan 1, 1933
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Minerals Beneficiation - Technical Notes - Particle-Size Analysis: Sedimentation Methods
By G. W. Phelps
The field of industrial minerals is concerned with both sieve size and distribution of sub-sieve particles. A great deal of work has been reported on the techniques designed to provide information of
Jan 1, 1967
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Prereduced Iron Ore Pellets: State Of The Art – Part II
By Morris M. Fine, Norwood B. Melcher
It is out of the question, at this time, to select any one prereduction process as superior to the others. It is apparent that several share a basic similarity and that within the groups listed in Par
Jan 8, 1966
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Reconstruction Methods of the ?Hecla? Electrical-Mechanical Equipment
By A. C. Stevenson
IN OUTLINING the various steps taken and the exigences met during the time of unwatering and rebuilding the burnt top equipment at the Hecla mine, the major portion of the detail is omitted and a gene
Jan 1, 1924
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Anthracite-Culm Briquettes.
By CHARLES DORRANGE
INTRODUCTION. CULM is a general term used in the anthracite regions for many years to denote a mixture of coal, bony coal and impurities which is sent to the refuse-banks. Thus, 35 years ago culm con
Sep 1, 1911
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Minerals Beneficiation - Rock Mechanics - Application of Probability Theory to Factor of Safety
By K. C. Ko, D. A. Pifer
The theory of probability with respect to the failure of structures is discussed. It is shown that the probability of safety, probability of failure, and factor of safety are directly related to each
Jan 1, 1971
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Logging and Log Interpretation - Acoustic Velocity in Porous Media
By M. Felsenthal
Engineers are frequently faced with the problem of having to predict oil recovery from a solution gas drive reservoir in the early life of a field. This is often the time when actual laboratory or fie
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Engineering Lifted from Back Room of Blueprints to First Order of National Importance
By Herbert Hoover
DURING the year, the' Institute has made the most remarkable growth in its history. Our actual increase in membership was 1816 and therefore was 80 per cent. larger than any previous year. Even w
Jan 1, 1921
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Statistical Analysis Points The Way For $$$$ Savings In Beneficiation
By A. C. Dorenfeld
CHANGES in circuits are often made in milling operations. At the same time that these changes are being evaluated the ores are changing. Even from the same mine, the ore is usually variable as to amou
Jan 10, 1954
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Part VI – June 1969 - Papers - A Comparison of Conventional and Knoop-Hardness Yield Loci for Magnesium and Magnesium Alloys
By B. C. Wonsiewicz, W. W. Wilkening
Following a procedure proposed by Wheeler and Ireland, Plane stress yield loci were constructed from Knoob hardness numbers. Basically, six differently oriented hardness measurements were made on thre
Jan 1, 1970
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Australia's Top Money-Maker: Coal
In the Bowen Basin of central Queensland, coal production has gone from virtually nothing in 1961 to more than 24 million tons today4ut there's a cloud over this success.
Jan 1, 1977
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First Copper Reverberatory Conference
By AIME AIME
WITH the example of the steel open-hearth men and their round table conference before the copper men, the query naturally arose "Why cannot we do likewise?" The advantage of pooling and comparing know
Jan 1, 1930
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Mineral Dressing
By Charles E. Locke
DEPRESSION in all lines of the mineral industry except gold, which began in 1930 and continued, even worse, through 1931, had its effect on ore concentration. Construction was limited to the completio
Jan 1, 1932
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Stock-Distribution and Its Relation to the Life of a Blast-Furnace Lining
By T. F. Witherbee
Discussion of Mr. Baker's paper, read at the Lake Superior Meeting, September, 1904. MR. T. F. WITHERBEE, Durango, Mexico (communication to the Secretary*) : Mr. Baker's paper is very instr
Mar 1, 1905
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Abstract - Interpretation of the Literature on the Mechanism of the Hall Process
By John J. Stokes
Literature on the electrolysis of aluminum from cryolite melts and on the structure of these .melts is surveyed critically. Data on density, freezing point, and other properties are reviewed. Theories
Jan 1, 1959