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Jan 1, 1967

Jan 1, 1916

This symposium is based on material presented at the AIME Annual Meeting in New York, February 1958. Co-Chairmen of the panel discussion were Truman H. Kuhn, Colorado School of Mines, and J. E. Monroe, Freeport Sulphur Co. Panel members are listed above. In opening the meeting Chairman Monroe pointed out that both industry and education have their special problems and that the purpose of this and similar discussion groups is to bring together members from both industry and education in order to help solve their problems.

Jan 6, 1958

Jan 1, 1927

By S. A. Falconer

This paper deals with the practical application of the Dutch State Mines cyclone separator for fine-coal cleaning. The more important operating variables are discussed, and results of a number of continuous- scale tests on various fine coals with a 6-in. cyclone separator are given. Descriptions of the Cyanamid Pilot Plant and the 50 tph Cyclone Separator Plant at the Emma Washery in Holland are included.

Jan 7, 1950

Jan 1, 1919

By H. M. Woodrooffe

Three of the world's largest phosphate deposits are located in the USSR. These have an estimated reserve of 2,600 million short tons of elemental phosphorus. The best known lies in the Khibiny Massif, an alkalaic rock formation some 600 square miles in area with mountain peaks rising to an altitude of 3300 ft above the surrounding terrain. The Khibiny Massif is north of the Arctic Circle in the Kola Peninsula at a latitude of 67° 30' north and a longitude of 35° 30' east. It is connected by rail to Murmansk, 100 miles northwest, and Leningrad, 900 rail miles south.

Jan 12, 1972

By R. J. De Angelis, J. B. Cohen, A. Nelson

In this note several recent results on twinning in copper shock-loaded with planar shock waves will be presented and the role of the twins in recrystalliza-tion will be discussed. The twinlike markings first observed in shock-loaded copper by smith1 were identified as twins by De Angelis and Cohen.2 This identification has been confirmed by others.3 In Ref. 2 it was also shown that there is an orientation dependence for twinning at low shock pressures, such that twins in a crystal loaded in [lll] form in the rarefaction or tensile wave but in

Jan 1, 1967

By Henry M. Howe

My attention has been drawn within a few days to a series of articles in Volume XVIII of the Engineering and Mining Journal, 1874, by Mr. J. A. Church, in which it is stated, among other

Jan 1, 1954

By S. G. Malghan

Steel consumption forms a significant part of the operating cost of a minerals processing plant. An estimated 250 kt (276, 000 tons) of steel in the US and over 500 kt (551, 000 tons) worldwide are consumed each year in wet grinding alone. The depletion of ore grades and the need for finer grinding of abrasive ores are expected to increase steel consumption even more. Through continued research and development by the mining industry and the suppliers of steel products, several methods to reduce steel consumption have evolved. This paper critically reviews the mechanisms involved in steel wear and the currently available methods, materials. and operating conditions for reducing steel consumption. Particular attention is given to liner design modifications and substitution of rubber liners for steel liners.

Jan 1, 1983

Jan 1, 1920

By Henry M. Howe

MY attention has been drawn within a few days to a series of articles in Volume XVIII of the Engineering and Mining Journal, 1874, by Mr. J. A. Church, in which it is stated, among other

Jan 1, 1875

Jan 1, 1908

NEW MEMBERS The following list comprises the names of those persons who became members during the period Jan. 10 to Feb. 10, 1915: Members AGASSIZ, RUDOLPH Louis, Vice-Pres.,Calumet & Hecla Mining Co., Boston, Mass. AMIDON, RICHARD G., Min. Engr 3659 Girard Ave. N., Minneapolis, Minn. ANDERSON, HECTOR G. S., Min. Engr 323 N. 13th St., Muskogee, Okla. ANDERSON, JOHN CARTER, Petroleum Engr 2307 S. 33d St., Omaha, Neb. CLARKE, ALEXANDER FIELDER, Works Mgr., Firth-Sterling Steel Co., McKeesport, Pa. CROSS, CARLOS GARCIA, Min. Engr Calle Valparaiso 194, Vina del Mar, Chile. DAWSON, THOMAS WILLIAM, Min. Engr., Asst. Chief Engr., H. C. Frick Coke Co., Scottdale, Pa.

Jan 3, 1915

By Bruce E. Grant, Thomas Jancic, Lawrence G. Dykers, Frank Buchella

Principal factors influencing equipment selection can be grouped into five basic categories: tonnage requirements, ore and waste; topography and property line considerations; ore control requirements; physical characteristics of ore and waste; and climatic considerations. Loading, transporting and ground preparation equipment are largely determined by tonnage requirements. Large size equipment is appropriate for a production of about six million tpm, medium size for three million tons and small size for one million tons or less.

Jan 12, 1973

Jan 1, 1898

ERDA Issues Figures for 1975 Uranium Production and Drilling, 1976 Reserve Estimates

Jan 5, 1976

By A. E. Austin, J. R. Doig

Ti-Cr alloys age harden after B-quenching by formation of an W-phase. The structure and orientation of this transition phase have been determined. The hardness ap-pears to be caused by strain in the B-matrix produced by concurrent enrichment of alloy content in the W-phase. EARLY studies of age hardening in B-stabilized titanium alloys revealed the formation of a transition phase named o' This phase was detected by X-ray diffraction in binary alloys of Ti-Fe, Ti-Cr,

Jan 1, 1958

By M. C. Fuerstenau, D. N. Collins, R. B. Bhappu, D. N. Moir

D. N. Moir (Senior Scientific Officer, Warren Spring Laboratory, D.S.I.R. Stevenage) and D. N. Collins (Scientific Officer, Warren Spring Laboratory, D.S.I.R., Stevenage, England) — During work on the petroleum sulphonate flotation of beryl in 1959 at Harwell, and subsequently at Warren Spring Laboratory, effects similar to those mentioned by the authors were noticed. Brief details of some of this work were given to the 6th International Mineral Processing Congress at Cannes.' It is interesting to note that the authors experienced strong activation effects with Fe+++ ions on beryl when using petroleum sulphonate collectors. This phenomenon was of interest in our work when

Jan 1, 1963