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Jan 1, 1930

National Steel Shuts Weirton Coal Operation Dutch Firm May Aid Ungava Project

Jan 7, 1953

By R. S. Shoemaker, F. W. McQuiston

Mineral Occurrence Treatment Method Table Page

Jan 1, 1975

By Samuel S. Wyer

The installation of the gas-producer power-plant in America has been so unusual that all engineers have viewed it with interest; a large majority, however, regard it with a lack of confidence and many with positive distrust. Despite the fact that

Jan 1, 1906

By Harry C. Wiess

RECENT announcement of further restrictions on gasoline consumption in the Mid-West and Southwest has focused public attention on current discussions of an oil scarcity. Conflicting arguments are advanced on the one hand that we have plenty of oil and will not need to restrict consumption as soon as transportation facilities are adequate, and on the other hand that a great impending shortage will require most drastic reductions in civilian consumption in order to provide adequate supplies for military purposes. Data can be presented to support both views, the result being that the public is confused and uncertain of where the truth lies. For a nation with about half of the known crude-oil reserves of the world and two thirds of the total production it seems almost incredible to the layman that any shortage can exist. Those familiar with estimates of future demand. however. show increasing concern regarding our ability to meet military demands without further restrictions in civilian use or wasteful production from our remaining reserves. Only by considering such facts as are available and can be made public can a true appraisal be made of whether or not we are faced with a shortage that will amount to a crisis in crude oil.

Jan 1, 1943

Jan 7, 1976

By R. J. Blackwell

Jan 1, 1952

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Jan 1, 1938

By R. W. Raymond

I desire to call the attention of members of the Institute to a new method of plotting and determining faults in mineral deposits, suggested by Prof. Hanns Hoefer, lately of the Mining School of Przi-

Jan 1, 1882

By Henry M. Howe

The present paper aims to present in brief the results of Tetskichi Mukai's* studies of the remarkable changes in the properties of manganese-steel caused by changes in the rate of cooling, together with some inferences of my own. Manganese-steel may vary greatly in composition ; that containing from 10 to 13 per cent. of manganese has hitherto reached the widest use. In this paper I consider manganese-steel of about this composition only. To distinguish common steel from manganese-steel, I speak of the

Jan 1, 1893

By John A. Wolfe, James A. Niederjohn

Applications of mathematical statistics to the field of exploration are still relatively new. There are two primary reasons why little has been published in this field. First, if one discovers an effective technique for exploration, he does not like to disclose it. Second, the geologist needs to work closely with a mathematical statistician, and the communications barrier between the disciplines is formidable. The authors, one a geologist and the other a statistician, were interested in the economic benefit which appeared to be possible in the inter-disciplinary area they call "geostatistics."

Jan 11, 1962

Here are the details . . . . . of how a $2.5 million research gamble, now backed by five years of intensive development in cooperation with the Chemical Construction Corp. resulted in a hydrometollurgical process that yields pure metal powders from sulphide concentrate - a process that offers potential savings of $2.5 million a year.

Jan 6, 1953

By B. Meddings

The technology involved in the Sherritt process for the recovery of nickel and cobalt from sulphide concentrates and mattes is presented in a manner which emphasises the chemistry of the process. The hydrometallurgical process takes advantage of the differing stabilities of the various oxy-acids of sulphur from thionates through thiosulphates to sulphate. Some separations are based upon stability differences, some upon kinetic differences and some upon valence state differences and similarities The engineering and economic factors involved in hydrometallurgy are not discussed in either detail or depth.

Jan 1, 1981

By Z. E. Arlin, R. D. Lynn

The problem of disposing of excess waste water coming from The Anaconda Co.'s two uranium mills in Grants, N. M., first confronted the company's engineers in 1956. The increased discharge of mill waste water was due to the start-up of a second mill, recently completed to supplement production from a smaller plant which the company had operated since 1953. The waste water is mildly acidic and has a low level of radioactivity due to small amounts of uranium-natural, thorium-230 and radium-226. In addition, it contains large amounts of manganese, iron and the sulfate and chloride salts of sodium, calcium and magnesium.

Jan 7, 1962

By Alexander L. Holley

Jan 1, 1879

By G. B. Richardson

WHILE examining a number of curves showing the production of petroleum, the author was impressed by the rather uniform relationship between the cumulative production from the beginning of development FIG. I.-ACTUAL' AND COMPUTED PRODUCTION OF PETROLEUM IN WEST VIRGINIA. down to the time the peak was attained and the estimated total production. The curves examined showed an average ratio of cumulative peak production1 to total production of approximately 30 per cent. FIG. 2.-ACTUAL AND COMPUTED PRODUCTION OF PETROLEUM IN CAT CREEK FIELD, MONTANA. These relations were discussed with C. E. Van Orstrand, geophysicist of the Geological Survey, who investigated the subject mathematically.

Jan 3, 1925

By J. T. Duce

In viewing the petroleum world as a whole certain tendencies arc to he noted. The first of these is of a legal and political nature. It involves the nationalization of the oil industry; in some instances going into all its phases and in others with reference simply to production.

Jan 1, 1928

By S. K. Ghosh

This paper discusses how the information on ash composition, ash-fusion temperatures, and ash-slag viscosity can be used to predict slagging and fouling potentials of a particular coal. A review of several empirical parameters that are commonly used for determining such potentials is given. Also, some guideline values for interpreting the relative propensity of slagging and fouling of various types of coal are provided.

Jan 1, 1986

By Grover J. Holt

Low grade ores dwarf high grade, tonnage wise. Bigger and improved-design machines feature modern concentrators. Flowsheets becoming more complex.

Jan 2, 1951