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COUNCIL OF SECTION DELEGATES A J Duff G H Ruggles E D Gardner E H Torgersen F W Strandberg, Chairman W I Garms H C Weed R D Chapman, Vice-Chairman H M Lavender J A Wilcox F T Moyer. Secretary W C Lawson C F Willis EXECUTIVE COMMITTEE J E Kastrop L Thiessen Past Chairmen R H Smith E H Wisser P D I Honeyman R W Hughes C H Kuzell

Jan 1, 1951

THE late steel strike resulted in an unusual reversal of field when Brazilian interests shipped steel to the United States to assure completion of a blast furnace under construction in Cleveland for the national Volta Redonda mill. The furnace is one of the key factors in an expansion program scheduled to raise Brazilian steel production by 280,000 tons, bringing annual output to 1 million tons. The first consignment shipped to Cleveland included 500 tons of slab and plate steel, and was followed later by another 300 tons. Brazil wants to blow in the furnace by July 1, 1953, and the restricted allocation system brought about by the steel shortage offered a real threat to the deadline. Volta Redonda, established during World War II by Brazilian and American financing, accounts for more than half of Brazil's steel production.

Jan 1, 1952

By E. O. Fromm, R. I. Jaffee, R. M. Evans

IN connection with a research on gallium alloys, a method for the thermal analysis of very low melting alloys was developed, which appeared to be worthy of more than passing interest. As used, the method was suitable for work in the temperature range, — 72° to 250°C. However, with suitable adjustment, the method could be adapted for use over broader temperature ranges. The Rosenhain temperature gradient furnace,' adapted for low-temperature use, was the basis for the method. The gradient was set up in a stainless steel tube. The specimens were lowered through it at a constant rate while time-temperature or inverse rate data were taken. It was essential to maintain careful control of the top and bottom temperatures of the gradient. Also essential was good heat transfer from the walls to the specimen. This was accomplished by a liquid heat-transfer medium.

Jan 1, 1953

By E. Maltby Shipp

E. MALTBY SHIPP.-It was the intention of the Committee on Safety anti Sanitation to collect information and useful data from the companies having well-organized safety departments and print this in pamphlet form for distribution among the small companies that have no way of employing safety engineers nor have at their disposal these data. Consequently, I took these rules and the general data, especially the rules, went over them a great many times and tried to cut out whatever duplications appeared.

Jan 4, 1917

By A. Kavetsky, W. J. Whiten

Data from ball mills with a wide range of diameters are analyzed using detailed mathematical/ numerical models. Analysis shows the relative power inefficiency of large ball mills is due to their inefficient breakage of coarse particles. The models developed can be used to scale-up mill behavior. The behavior of large mills at Bougainville and Pinto Valley is compared. It is concluded that the mills are equally inefficient at grinding coarse particles. Differences in coarseness of total mill feed are shown to account for the fact that Pinto Valley mills achieved design throughput whereas Bougainville mills did not.

Jan 1, 1985

Carlisle: I'm in the office of Comar Wilson in London. Comar is going to be good enough to talk about some of the very interesting things that have happened to him during a full, active, exciting life. Let's start in and find out where you were born, where you went to school, etc. Wilson: My parents lived in the heart of the Lake District in Cumberland, England. My father had about a half-interest in a small lead mine which he ran. He was quite non-technical, but he ran it.

Jan 4, 1965

Despite the uncertain political situation in Katanga, copper and cobalt mining and metallurgical operations of Union Miniere du Haut-Katanga were normal at the time of this writing. In fact operations continued normal after Congo independence on June 30, 1960, with copper and zinc production for that year being slightly higher than in 1959. United Nations military operations from September to December 1961 resulted in death, shutdowns and damage to company persons and installations. Nevertheless, results for that year were only slightly off normal production. Moise Tshombe delared Katanga a separate state after Congo independence. Although there has been tribal unrest, the new State has enjoyed relative calm and normal industry by comparison with other parts of the Congo as a result of the firm hand of Moise Tshombe's government and the continued presence of Belgian officials and technicians.

Jan 12, 1962

By Nick Warren

The problem considered is that of predicting rock physical properties from observations of the structure of the rock. The approach here departs from previous studies in that both the physical properties and structural features are taken as statistical data and the relations between them are cast as statistical functions. This approach I have termed a "quantitative petrostructure analysis". This Paper deals with two aspects of making such a study; parameterizing patterns of topographic features of rock, and characterizing variables to allow correlation studies to be carried out. The principle of a quantitative petrostructure analysis is outlined and illustrated using maps from two samples of Conway granite.

Jan 1, 1982

By SME

A regular feature of the December issue is the abstracts of graduate theses in the mineral industry field presented during the preceding year. The following abstracts were submitted for this second article in the series.

Jan 1, 1976

By John D. Siddle

Efficient energy utilization in the electrolytic zinc process, relative to other zinc processes, is one of the reasons for its wide adoption in recent years. Designers and operators of electrolytic zinc plants have pioneered process improvements, new equipment, and operating techniques to conserve energy. As energy costs advance still higher in the future, and competitive pressure against the less efficient producers increases, these or alternative energy-saving methods will be looked upon as a necessity for economic survival. Estimated energy savings which may be achieved by various equipment and techniques are included.

Jan 1, 1977

By Finn Ouchterlony

A simple bilinear R-curve description of crack extension resistance is applied to the testing of sub-size rock core specimens. The K-curve consists of a linear sub-critical part and a flat post-critical part. Formulas for the apparent energy rate resistance quantities Gm, Jm, and [R] are developed. Experiments on notched cores of Ekeberg marble, Bohus granite, and Stripa granite are compared with these predictions. The R-curve model gives reasonable results for Gm -data but fails essentially to describe the Jm and [R]-data. Another model with a sharply increasing linear post-critical part could possibly account for the [R]-data, but direct R-curve measurements seem a better approach.

Jan 1, 1982

Iron and steel lire subjects that will receive the attention clue them at the meeting in. St. Louis. Within the past 2 years the smelting of iron ore on a large scale has been started in the St. Louis area, and the blast furnaces are in full operation. Ore is being received. from the Lake Superior region, in large barges .brought clown the Mississippi River. Firebrick, for the lining of the furnaces, is made in the. St. Louis district to a greater extent than elsewhere in the country. At this meeting, there will probably be a discussion of the possibilities of the increase of manganese production in this country, and of improved methods of using it in steel manufacture.

Jan 10, 1917

By J. C. Smock

The magnetic and polaric properties of magnetite, or magnetic iron ore: are fundamental facts in magnetism. The disturbing erect of this mineral upon the magnettic needle in land surveying must have been very early observed. The difficulties arising from this source are still almost insurmountable in making accurate surveys in districts where this ore occurs to any extent, either as a rock

By Edwin T. Wood

THE term blending as used herein refers to the mixing of ores assaying more than 0.20 pct U3O8 with low grade material assaying less than 0.20 pct U3O8. Such blending when properly understood and controlled will produce more total dollars of profit from many mining ventures. The question whether or not to blend is particularly vexing when an orebody is surrounded by an envelope of low grade material or separate tonnages of low grade exist which could be extracted coincident with the higher grade ores. Should any, all or part of this low grade be mined? If so, in what proportion and what is the limiting assay of the low grade material?

Jan 7, 1958

By Freeman Bishop

The tight electric power supply is one of the most dramatic problems facing the mining industry in 1971. This is caused by rising demands for energy. Clean-fuel and air-pollution controls have contributed to the problems of producing energy from sulfur oil and coal. Coking coal has become scarce. One stimulating development is that coal is no longer the cinder in the mining industry's eye. In fact, it may be the favorite candidate as a base for fuel within a few years. Synthetic gas from coal is the watchword. In dedicating a multi-million- dollar project aimed at converting coal into oil and gas, Hollis M. Dole, Assistant Secretary of the Interior, recently made it clear that coal, which has been taking a back seat to nuclear fission research and study grants, is now coming into its own. Conversion pilot plants are being activated in all parts of the nation.

Jan 1, 1970

By John E. Miller

The Miller Number System is a well established method of measuring the relative abrasivity-friability of slurries, resulting in data that can be used in the selection of pump type and in forecasting wear-life of pumps and pipelines in slurry service. 1,2 Then after the pump type is selected, a Flow Analysis is determined by computer using pump design and operating parameters. This is used to determine pulsation control, suction requirements and stabilization, etc.

Jan 1, 1977

By J. R. Eickmeier

COUNCIL OF NATIONAL DEFENSE W: S. GIFFORD, Director, GROSVENOR B. CLARKSON, Secretary. The Council of National Defense The Advisory Commission NEWTON D. BAKER, DANIEL WILLARD, Chairman, Secretary of War, Chairman.. (Transportation). JOSEPHUS DANIELS, BERNARD M. BARUCH, Secretary of the Navy. ' (Raw Materials). DAVID F. HUSTON, HOWARD E. COFFIN, Secretary of Agriculture. (Munitions, Manufacturing). FRANKLIN K. LANE, HOLLIS GODFREY, Secretary of the Interior. (Science and Research, including En¬ WILLIAM C. REDFIELD, gineerlng and Education). Secretary of Commerce, SAMUEL M. GOMPERS, WILLIAM B. WILSON, (Labor). Secretary of Labor. F. H. MARTIN, (Medicine and Sanitation). ' JULIUS ROSENWALD, (Supplies). At the request of Dr. Hollis Godfrey, Chairman of the Advisory Committee On Science and Research, which includes Engineering and Education, a Sub-Committee of Engineering Societies has been appointed with representatives as follows:

Jan 6, 1917

By F. H. Newell

At the Glen Summit meeting of the Institute, held in October, 1891, the writer presented a paper on the results of stream-measurements of the United States Geological Survey, reviewing briefly the data obtained at that time.* Since then the investigations have been steadily continued and enlarged, so that at the present time about 150 river-stations are main-

Jan 1, 1898

By L. T. Larson, P. M. Basinski

In the northern Reese River Valley uranium is corroded with Middle Pliocene zeolites. These zeolites were diagenetically derived from rhyolitic volcanic glass deposited in a saline- alkaline lake. X-ray diffraction, scanning electron microscopy, and chemical studies reveal clinoptilolite, analcime, and enonite to be pesent and that these minerals can concentrate at least 0.7% uranium from solution. Most anomalous drill cuttings contain zeolite and zeolites are believed to host the uranium. Research suggests the uranium mineralization is conceptually analogous to the Tono mine, Japan.

Jan 1, 1981