Search Documents

Jan 1, 1967

Jan 1, 1967

Jan 1, 1922

Jan 1, 1970

SECTION I PAGE PAGE Bulletin Wanted v Northwest Mining Convention St. Louis Meeting v (Columbia Section) xvi Proceedings of the Meeting of Affiliated Student Societies... xvii the Board of Directors vii Harrison W. Craver, New Li-¬ John Fritz Medal viii brary Director xviii Herbert C. Hoover, Food. Con Library xx troller viii Pamphlets for Sale xxii President's Prize ix Membership xxxvi Emmons Memorial Fellowship. x Biographical Notice of Her¬ Meetings of Various Societies. x Mann A: Keller : lviii Personal xi Institute Committees lix Employment xii Officers and Directors lxvi Local Section News xiii

Jan 5, 1917

Jan 1, 1955

Jan 1, 1949

By N NA

Jan 1, 1953

Jan 1, 1913

Jan 1, 1943

By G. Aertsen

THE CHAIRMAN (HENRY D. HIBBARD, Plainfield, N. J).-This excellent paper fills a gap in our Transactions and is most acceptable. In the early days another way of casting tire ingots, sometimes called cheeses, because of their shape, was to use a 22-gage sheet-iron cylindrical can for each ingot of the proper size to give the weight desired. These cans were bottom cast in groups, usually of four, each can being surrounded by a heavy iron ring somewhat taller than itself the top of the can being covered by a circular cast-iron plate having a small conical riser in the center, about 2 ½ in. in diameter at the bottom and 10 in. high. The top plate was clamped down to resist the upward pressure of the fluid metal and the space between the can and the outer ring, usually about 2 in. wide, was filled with dry sand. The riser permitted the escape of some of the air displaced by the steel and also increased the pressure in the steel when the mold was filled, and so diminished somewhat the tendency for gas holes to form. But little was known of segregation and pipe in those days, though the center of an ingot was understood to be the worst part, and it was separated in part in the disk which was punched out in perforating the ingot. This disk was about 8 in. in diameter and from ¾ to 2 in. thick, the variation in thickness being to rectify the weight. When an ingot was too -heavy, a thicker disk-was made by not driving the punch in quite as far as when the ingot-weight was right. Then the bloom was turned over and the punch driven in on the other side, which finished the punching and detached the disk. The tire bloom was then" becked" and later reheated and rolled as described in the paper. The forging was done with a 10-ton double-acting steam hammer. The steel generally speaking had lower carbon, from 0.45 to 0.55 per cent., than tires today have, and the tires were smaller, the most common size of ingot weighing 1,060 lb. each. BRADLEY STOUGHTON, New York, N. Y.-This paper was specially requested by the Iron and Steel Committee, because that Committee thought so important an industry should have its history written by one who was familiar with it, and before he had forgotten, or all the rest of the world had forgotten, its early stages. Mr. Aertsen has said that it is not an exhaustive research. I think it would not be any different if it were an exhaustive research, because our library made a careful attempt to find some written light on the history of these tires, but very little was found.

Jan 4, 1917

By Richard McCaffery

THIS paper considers certain aspects of the acid Bessemer process, particularly in its relations to the duplex process-that combination in which the pig iron is first desiliconized and decarburized in acid Bessemer converters and then dephosphorized in basic open-hearth furnaces. The acid Bessemer process employs an acid-lined converter and produces an acid slag. The blow is usually thought to eliminate the silicon and manganese as oxides and then to burn off the carbon as carbon monoxide. On account, however, of the relatively large amount of metallic iron present in the converter, compared with the relatively small amount of the impurities it is desired to oxidize, the first reaction in the converter probably is the formation of iron oxide, which dissolves in the bath and acts as an oxygen carrier for the silicon and carbon. As soon as iron oxide is dissolved throughout the bath, the oxidation of silicon commences; but in the early stages of the blow the mass law would indicate that iron oxide must form first, and this oxide probably increases up to some saturation point. The molten metal in the converter from the early stages of the blow right through to its completion remains basic, while the slag produced is siliceous. This fact is shown by the corrosion of the acid bottom and the tuyeres, which is greatest at the tuyere orifice where oxidation is most active and where there is the most iron oxide. Why does this acid bottom corrode? Because it is attacked by a base. The thought, therefore, suggests itself, why not make the bottoms of basic or neutral material?1 As the converter slag is acid, those parts of the converter coming in contact with the slag should be acid; but those parts of the converter that are in contact with the molten metal saturated with metallic oxides should be basic or neutral. Bessemer operators have for some time tacitly admitted this condition, for the blast pressures have steadily increased with the object of keeping the metal in suspension, and so preventing bottom corrosion; if the molten metal were not basic, it would not attack an acid bottom. In addition, the tuyeres are bunched together at the middle of the bottom and a clear space is left around the outside of the bottom; if tuyeres are placed too near the side walls the

Jan 8, 1920

CHAIRMAN DOUGHTON of the House Ways and Means Committee announced on September 23 that the committee has scheduled public hearings on an excess-profits tax, beginning on November 15, 1950. In the meantime, the staff of the Joint Committee on Internal Revenue Taxation and the staff of the Treasury Department are to confer jointly on this question in the hope that such conferences may result in the preparation of a report on excess-profits tax proposals which could be used as a basis for testimony before the committee. It is thought that this procedure may aid in the draft of an excess-profits tax bill for introduction in the House when Congress reconvenes on November 27.

Jan 11, 1950

By Frances H. Clark

DEVELOPMENTS in powder metallurgy have been disappointing in 1943. If any new part has gone into large-scale production, knowledge of it has been restricted by considerations of national security. Nor have any outstanding papers appeared to advance the theory of the subject during this period.

Jan 1, 1944

AN unprecedented expansion of the mineral industries began in mid-1950. There are few minerals on the strategic list for which some source of supply here at home has not been found. All types of inducements have been utilized, ranging from RFC loans to guaranteed-price purchase contracts. No one can deny that tremendous progress toward mineral self-sufficiency has been made. Despite the greatness of these accomplishments, made' in the name of national defense, one cannot help but. have a feeling of uneasiness over the price which has been paid-in indebtedness, in freedom, and in the sacrifice of private enterprise. The people of the Soviet have been enslaved by a military state which attempts complete control of the economy. A similar yoke has been imposed on the business life of this nation. Of course, there is a difference in degree of control and in purpose. We are dedicated toward defense and the resistance of aggression. And, our personal liberties have not been usurped. The realization of the extent to which this nation has been forced by Communist aggression to adopt the practices of the socialized state is appalling.

Jan 1, 1952

These springs arc situated on the south bank of the river about four miles below the City of Great Falls. In addition to the spring on the bank there are several in the bed of the river. Estimates on the flow of all these vary from 350 to 600 cubic feet per second, and as the temperature is practically constant at 53° F. throughout the year, the effect on the river water is to prevent the formation of anchor ice at the Rainbow Fails power development below, trouble of this source being in evidence every winter at the Black Eagle Falls above. Geologists claim that the water of the Giant Springs is derived from seepage through an old pre-glacial channel of the Missouri River now occupied by Sand Coulee, five miles up-stream from Great Falls. The water in this buried channel seeps through the flat-lying sandstone of the region and again unites with the present stream at the site of the springs.

Jan 1, 1913

By R. H. Lee

So far as I am aware the references to the " kerosene blow-pipe" in the Transactions comprise only a skeptical opinion from Mr. Witherow (ix., 70), and accounts of the use of the blow-pipe by Mr. Witherbee (xiii., 675) and Mr. Gayley (xiv., 779), together with brief remarks by Mr. Weeks and Mr. Kennedy on Mr. Witherbee's paper. The subject can scarcely be considered novel, in view of these references, yet it is not so far exhausted that an additional account of the successful application of the blow-pipe would be out of place, especially if accompanied with some new details and a drawing of the apparatus itself, showing its simplicity and safety. Some time ago, owing to a variety of causes, my furnace was working very badly, the troubles culminating suddenly one morning in a chilled hearth, solid from the bottom to the tuyeres, with the exception of a narrow passage-way from above to the cindernotch, which remained open. Through this we continued to flush and cast, with the prospect of a long and troublesome siege, in working down to the iron-notch. At the end of two days matters had not greatly improved, and we seemed no nearer the desired result than on the morning of the chill, when, at the suggestion of Mr. Farrell, of Glamorgan, I decided to use the coal-oil blow-pipe; the intention being to cut a hole from the iron-notch up to the tuyeres, and then let the furnace melt out the chilled mass. In four hours from the time of starting, the hole was made and

Jan 1, 1887