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By Tsuyoshi Miyashita

Onahama Refinery of Ryoho Recycle Company employs the electrothermic process for producing marketable zinc oxide from steelmaking dusts. The process comprises washing, filtration, drying, sintering and furnacing. Fume from the sinter machine is treated hydrometallurgically to recover zinc, cadmium and lead.

Jan 1, 1976

EVERY mould, of whatever kind it may be, must have an entrance appropriate to the material if it is wished to fill its inner space with bronze or other metal. It is likewise necessary that it have vents, that is, air holes, for there is nothing that is not full of air even though it be called empty. Now, molten bronze is a material that has an immediate effect because of its heaviness, and because it is as hot as fire or even hotter,

Jan 1, 1942

Jan 1, 1892

By John H. Hearding

Induction heating, together with automatically controlled tempering and hardening is giving Oliver faster and more accurate bit sharpening, while experiments with bit taper promise to offer increased footage per bit.

Jan 10, 1953

AFTER the aforementioned subjects, I wish to speak to you of the method of welding bells that are cracked. This seems to me an ingenious thing, little used, but of great usefulness. Bells are cracked by the blows of too large a clapper or by excessive and forced ringing. This often cracks them at the rim, in the heart, or in some other place so that they lose their tone because of these cracks, and give no more

Jan 1, 1942

Organization Place - Date 1918 American Iron and Steel Institute New York, N. Y. May American Water Works Association :.. St. Paul, Minn. May 20-25 American Institute of Chemical Engineers Berlin, N. H.. June 19-22 American Concrete Institute Atlantic City, N. J. June 24-26 American Society for Testing Materials Atlantic City, N. J. June 25-28 New York Electrical Society New York, N. Y. June National Association of Stationary Engineers Cincinnati, 0. Sept. 9-13 National Exposition of Chemical Industries New York, N.Y.. Sept.23-28 American Chemical Society Cleveland, 0. Sept. National Petroleum Association Atlantic' City, N. J. Sept.

Jan 5, 1918

I HAVE striven to demonstrate to you as well as possible the method of bringing the metals of your ores to their ultimate perfection. But one cannot always do with gold that is found in the ores what is done with the other metals, for gold is not always accompanied by fine silver nor is it

Jan 1, 1942

By J. W. Parkinson

A coal-cleaning plant's environment can be hazardous to a computer system. The computer must be more reliable than the coal-cleaning plant mechanical processes if it is to help improve clean-coal quality and yield by performing data gathering and process control tasks. This paper discusses coal-cleaning plant environmental hazards and installation philosophies that can protect the computer. Specific reference is made to a computer system installed at the Electric Power Research Institute's Coal-Cleaning Test Facility.

Jan 1, 1983

MAJOR AWARDS JAMES DOUGLAS GOLD MEDAL 1960-Augustus B Kinzel "For outstanding contributions and inspiring leadership in the field of electrolytic and electrothermic winning of nonferrous metals and for his notable administrative ability " BENJAMIN F FAIRLESS AWARD 1960-Charles McElroy White "His ability, energy and determination in starting the top-pressure blast furnace and foresight in providing it with prepared burdens have created the world's dominant metal producer " HAL WILLIAMS HARDINGE AWARD 1960-Samuel H Dolbear "Eminent mineral consultant and engineer-first chairman, Industrial Minerals Division of AIME-first editor, 'Industrial Minerals and Rocks'-for the improvement and increase of industrial mineral knowledge "

Jan 1, 1960

The President was authorized to appoint a committee comprising himself and five others, to draft an amendment to the Constitution for the purpose of bringing before the membership the suggested change in qualifications for members. The President thereupon appointed the following Committee: Edwin Ludlow, Chairman, B. B. Thayer, J. W. Richards, G. C. Stone, C. F. Rand, and P. N. Moore. The President was authorized to arrange with the Bureau of Mines for the payment of the necessary clerical assistance to copy the inventory of

Jan 8, 1917

[ARIZONA Established July 10, 1915 ROBERT W. HUGHES, Chairman CHARLES R. KUZELL, First Vice-Chairman GILBERT C. DAVIS, Second Vice-Chairman W. CLARK MASON, Secretary-Treasurer Inspiration Cons. Copper Co., Inspiration, Ariz. LYLE BARKER ROBERT HIGH T. G. CHAPMAN P. D. I. HONEYMAN GEORGE M. COLVOCORESSES WALTER C. LAWSON EDWIN H. CRABTREE, JR. W. H. LOERPABEL WALTER I. GARMS ALBERT MENDELSOHN WESLEY P. Goss CARL E. MILLS H. C. HENRIE JOSEPH A. WILLCOX C. F. WILLIS]

Jan 1, 1946

By Raymond E. Zimmerman

ROBERT E. HOCHSCHEID (Krebs Engineers, Cyclone Div.)--The subject article appears in the February, 1978, edition of Mining Engineering, and on page 190 carries the statement, "As most operators know, in a Water-Only cyclone, ability to adjust the vortex finder is quite important due to the sensitivity of this type of operations to variance in feed conditions and having to take them apart to make this adjustment is always a nuisance." Our experience as a manufacturer and supplier of Water Only cyclones does not agree with the above statement, and we offer the following brief discussion.

Jan 5, 1978

By James R. Stuart

AS the available remaining properties of iron ore reserves on the Mesabi Range are opened up for mining, the various properties located under lake beds are brought nearer an active status. The actual physical problems involved in stripping these properties do not act as a deterrent so much as the legal and political problems that are encountered.

Jan 9, 1951

By K. R. Carson, J. Weertman

THE fatigue-hardening curve has received much attention in recent years. This curve is obtained by plotting the peak stress required to maintain a given plastic strain per cycle vs the number of cycles. It

Jan 1, 1969

By Frank Firmstone

The material described below was made at Furnace No. 2, Longdale, Va., Oct. 28, 1907, during a sudden derangement of working, in the course of which the furnace became entirely bridged over and for some time no solid material whatever descended into the hearth. This caused the hearth to become so completely emptied that, at the tuyere-level, a pricker put in at one tuyere could be seen by looking in at the opposite one. The tap-hole was opened and the iron got out with some difficulty. It ran sluggishly, throwing many sparks, but was not

Jan 1, 1909

By A. E. Hall

The paper gives a general solution of ventilation net- works where densities play an important role and fans operating at different densities from branch densities are considered. Both the physics and computing techniques needed to deal with these networks are discussed.

Jan 1, 1977

By D. H. Gieskieng

E. H. BRONSON*—I find this paper very interesting, except that I am not able to understand the derivation of the so-called "realization factor." This factor is defined as the ratio of the size of square opening passing all the feed to the gape of the receiving opening. By this I presume the author means the size of rock feed to the width of crusher opening. So if we fed a 12 in. rock to a 16 by

Jan 1, 1950

Henry D. Hibbard, Plainfield, N J. (communication to the Secretary*):—This very interesting history is a valuable addition to our knowledge of the basic process and its introduction to this country. In addition to the attempts noted in the paper which were made here to establish the basic Bessemer process, and the experiment with the Siemens-Martin process at the Otis works, there were others made with the latter-named process at about the same date, all of which failed or, at least, were discontinued. The first attempt which survived was that of Carnegie,

Jan 1, 1911

Howe Memorial Lecture The Howe Memorial Lecture, in memory of Henry Marion Howe, Past President of the Institute, was authorized in April, 1923, as an annual address to be delivered by invitation under the auspices of the Institute by an individual of recognized and outstanding attainment in the science and -practice of iron and steel metallurgy- or-metallography, chosen -by-the Board-of Directors upon recommendation of the Iron and Steel Division. The following were the Howe lectures and lecturers for the years indicated 1924 What is Steel'., By Albert Sauveur.

Jan 1, 1938

MILNOR ROBERTS,* Seattle, Wash. (written discussion?).-The coal fields of Washington, on which Mr. F. A. Hill's paper gives much detailed information, lie on the western slope of the Cascade Range, which extends north and south through the State just west of its center. The mines are on the lower half of the slope, the lignite fields of Lewis and Thurston Counties extending into valleys and low hills west of the mountains. An exception is to be noted in the case of the Roslyn field, a small but important area which lies on the eastern slope.

Jan 11, 1918