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A Study Of The Transportation Of Mine Rock By Pumping, Howard Morris Fowler

Masters Theses

"The conclusions arrived at in regard to the practicability of utilizing pumps instead of skip haulage for the removal of ore and waste from mines are entirely theoretical, as it was impossible to make actual conparative runs. These results were arrived at by comparing known or estimated costs for both types of operations. The abrasion studies were conducted in the laboratory of the Mining Department at the School of Mines and Metallurgy. The pressure tank was designed in an effort to counteract the present necessity for using single stage pumps in sand pumping, and to find a means for eliminating …

Stresses In A Plate Having A Relatively Small Circular Hole And Loaded Parallel To The Axis Of The Hole Under Various Conditions Of Constraint With An Application To Deep Oil Wells, A. Dale Topping

Masters Theses

"The object of this investigation is to determine the stresses about a hole in a thick plate of large dimensions compared with the radius of the hole when the plate is loaded parallel to the axis of the hole under various conditions of restraint, and to apply the results to the case of a deep well. The case of a plate with an initial stress in its plane is also considered...The problem arose from difficulties encountered in the drilling of deep oil wells. After drilling has proceeded to a certain depth, the sides of the bore hole apparently collapse and …

Thermal Reduction Of Beryllium Chloride With Metallic Magnesium, Mailand R. Strunk

Masters Theses

"The purpose of this research was to investigate the thermal reduction of beryllium chloride by metallic magnesium. Beryllium is a remarkable element, being characterized by its hardness, lightness and durability. Although the art of metallurgy has developed to a point at which most metals can be produced at a low cost, there are a few metals, of which beryllium is an outstanding example, which can only be obtained at high prices and in small amounts because of the difficulties of recovering the metals as such from their compounds which occur in nature. Small amounts of pure beryllium can be obtained, …

The Civil Engineer, Lewis K. Downing

Faculty Reprints

No abstract provided.

Specification For The Design Of Light Gage Steel Structural Members, American Iron And Steel Institute

American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)

No abstract provided.

The Age Hardening Of Copper-Manganese-Nickel Alloys, William James Barnett

Masters Theses

"The Bureau of Mines in conjunction with their Electrolytic Manganese Alloys program has developed a series of age hardening copper-manganese-nickel alloys having properties which compare favorably with those of copper-beryllium alloys...An unusual and highly desirable characteristic of these alloys is their insensitiveness to rate of cooling from the solution temperature. Air cooled and water quenched samples will have identical time hardness curves on being aged. Instead of requiring closely controlled conditions characteristic of many age hardening alloys, these alloys cannot be subjected to a thermal mechanical handling which will prevent hardening on their being subsequently heated to the aging temperature. …

Prospecting, Developing, And Mining Bentonite Deposits, John Patrick Rasor

Masters Theses

"Clay and clay-like minerals are mined in many localities for a large number of uses. Most of these mines are small, seasonal operations. Common practice in these types of pits is to strip and mine clay from shallow overburden depths without the aid of careful prospecting and developing, and with little or no engineering technique. Bentonite deposits which must be continuously mined at tonnages from 5,000 to 7,500 tons per month require that the entire project be carefully planned and engineered so suitable equipment may be obtained and operational cost minimized. This thesis is concerned with the prospecting, developing, and …

Flotation Of The Oxidized Ores Of Zinc, Fred Henry Bunge

Masters Theses

"There is no satisfactory method of concentrating the finely disseminated oxide ores of zinc. Gravity methods of concentrating such ores may be used for coarsely crystalline materials in which the zinc material is free at approximately 10- to 35-mesh or coarser. In addition, gravity methods of concentration do not give a satisfactory separation on those ores in which the gangue mineral is small. As a result there is need for a method of beneficiating various deposits of oxidized zinc ores. The two commercially important oxidized zinc minerals under consideration are smithsonite, the zinc carbonate and hemimorphite, frequently referred to as …

A Study Of Mine Scraper Buckets And Their Efficiency, Austin Bond Clayton

Masters Theses

"The use of power drawn scrapers, often called "slushing", for the moving of ore, stops filling, and waste rock has become standard practice in many mining operations. Several types of scrapers have been developed by practical application or by trial and error methods. However, a direct comparison of these scraper types under identical conditions has not been noted in a review of literature on the subject of mechanical loading. Written inquiries to authorities on scraping practice have brought replies that no previous comparisons of scraper types on a modal scale have been attempted. Therefore, the following thesis problem was set …

Action Of Diatoms On Clay, Joseph Harvey Renfrew

Masters Theses

"With the recent trend toward the use of higher temperatures and more severe service conditions in the metallurgical and refractories industries there has developed a constantly greater demand for high-alumina clays, that is, clays in which the alumina content is considerably above that of pure kaolinite, Alâ‚‚O₃2SiO₂·Hâ‚‚O. However, the known reserves of good diaspors are so small that ceramic engineers are already turning to basic refractories in order to have sufficient materials for work at high temperatures. Even the slightest reflection on the needs of the refractories industry will show that such substitutions are strictly limited, and possible only where …

The Mechanical Properties Of Mine Rocks And A Standardized Test Procedure For Their Determination, Walter Edwin Lewis

Masters Theses

"The problem involves studies of the mechanical properties of rocks and was undertaken in an attempt to determine practical data that will help in estimating the supports required to maintain the roofs of mines during and after mining operations. One of the most important problems in mining today is that of the analysis of the action of mine-rock under stresses. From such an analysis in any given mining venture it should be possible to obtain cheaper methods of mining because the supports necessary to maintain the walls and roof of an excavation may be determined on the basis of how …

An Analysis Of Man Power Efficiency In Drilling Procedures In The Tri-State Mining District, Julian Alban Fuller

Masters Theses

"This thesis embodies the results of an investigation, by the time study method, of certain phases of drilling procedures recently brought into practice in the Tri-State mining district. The field work was accomplished during the months of July, and August 1945; the data obtained therefrom and the analysis presented in this dissertation apply to the practice in effect at that time"--Preface, page ii.

Exploration For Barite Deposits In Cole County, Missouri, Arthur William Brune

Masters Theses

"Barite is mined in the Southeastern and Central districts of Missouri. The Counties of Franklin, St. Francois, and Washington comprise the Southeastern district, and the counties of Benton, Camden, Cole, Miller, Moniteau, and Morgan comprise the Central district. Although the latter region is the larger of the two, its production of barite is far less than that of the other. The area which is discussed in this report is in the southwestern corner of Cole County. The main points of the problem were: 1. To determine the features, if any, which apparently controlled the localization of the barite deposits in …

Ceramic Properties Of The Clays Of The Polo Gas Field, Clarence Arthur Lambelet

Masters Theses

"In Western and Northwestern Missouri there exist many natural gas fields of such limited size and of such great dispersion that it is not economical to utilize their products by the construction of pipe lines to consuming centers. Thus a large source of natural wealth is lying idle. This wealth could be utilized, however, if some manufacturing process requiring large amounts of fuel were located in the vicinity...The availability of fuel is the reason for interest in the area, though an investigation should be made to assure the quality and quantity of the fuel in any selected area. the adequacy …

School Of Civil Engineering, Cornell University Investigation Of Structural Properties Of Light Gage Steel Structural Members, Cornell University School Of Civil Engineering

CCFSS Library (1939 - present)

SCOPE OF THIS INDEX This index gives complete information on the various features investigated in this program to date, the number of tests carried out under each heading and the particular reports which were issued on the respective phases of the work. The Index covers the Beam Progress Reports No. 1 to 40, the Beam Summary Reports No. 1 to 3 plus Addenda, the Stud Progress Reports No. 1 to 22 and the Stud Summary Reports No. 1 and 2 plus Addenda. It does not cover (a) the investigation on strength and properties of steel roof decks, (b) such additional …

Heat Transfer To Fuel Oil In Viscous Flow-Characteristics Of A Fin-Type Heat Exchanger., Boyd R. Abbott Jr.

Electronic Theses and Dissertations

A unit was constructed for the study of film heat transfer coefficients of a heavy fuel oil in viscous or streamline flow. The heat exchanger was of the shell and tube type, having extended longitudinal steel fins welded to the tube. Auxiliary equipment consisted of an oil pump, oil storage reservoirs, piping, and means for measurement of temperatures and oil flow rates. The unit was operated both as a fin type heat exchanger with the oil in contact with the finned surfaces, and as a straight tube and shell exchanger with the oil on the tube side. Oil flow rates …

Copper Commando - Vol. 3, No. 19, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls

All Issues, Copper Commando, World War II

In this issue… World War II, Mother’s Day, Philippines, Armed Services, copper wire, Butte, Montana, copper mines, South Pacific islands, Howitzer, Naples, Italy, War Bonds, Labor Management Bond Committee

The Examination And Treatment Of Industrial Magnesium Foundry Wastes, Oden Cass Garst

Professional Degree Theses

"The principle forms of magnesium foundry wastes not recovered by industry are fine dusts, such as, sawdust, rotary filings and grindings, and the melting- and refining-pot drosses. The Bureau of Mines has studied waste generation and has developed processes for the treatment of dresses for the recovery of secondary ingot metal and has also developed processes for the mechanical beneficiation of fine dusts. The studies on fine dusts were continued until suitable melting methods for the recovery of ingot metal, approximately meeting the applicable specifications, were developed...Recommendations are made for improved melting methods for magnesium sawdust that increase greatly the …

A Technique For Making Torsion Balance Surveys Of Inundated Areas, Karl Frederick Hasselmann

Professional Degree Theses

"The need for a technique for making torsion balance surveys of inundated areas was brought to the writer's attention during the years of 1927 to 1933, while employed by The Sinclair Exploration Company to prospect for oil in Austria, Hungary and North and Northwest Germany. At that time, the company was using ten torsion balances, supplementing the work with magnetometer surveys and refraction seismograph detail. During part of this period an elementary and relatively insensitive gravimeter was used. Some reflection seismograph work was also done during the last year of operations. During the course of surveying in North and Northwest …

Cornell University School Of Civil Engineering Tests On Light Beams Of Cold-Formed Steel, Cornell University School Of Civil Engineering

CCFSS Library (1939 - present)

I. SCOPE OF THIS REPORT In the Thirty-eighth Progress Report a series of 118 tests was reported on web crippling under concentrated loads. These 118 tests which included 17 representative tests of the Twenty-fifth Progress Report were carried out for web crippling by loads on the span, by simple end reactions, by end reactions with additional loads on top flange, and by reactions of continuous supports with similar additional loads. Two formulas were developed from the entire series of tests which represented, for the two cases (loads on span, and reactions), all test results with satisfactory accuracy. However, only 8 …

A Study Of The Separation Of Feldspar From Missouri Granite, Vernon Louis Kasten

Masters Theses

"The greatest use of feldspar is as a flux in the Ceramic Industry where it is used in the manufacture of abrasives, floor tile, terra cotta, china, and earthenware of all types. It is also used in the manufacture of glass and enamels, and much is used as grinding medium in powdered form because it is softer than the common abrasive, quartz...Missouri Granites are composed of feldspar, quartz, mica, and other materials, which may or may not occur in all the samples. It is the purpose of this investigation to attempt a separation of the feldspar from these other components …

A Comparative Analysis Of Some Recent Mining Practices In The Tri- State Mining District, James Francis Alexander Taylor

Masters Theses

"The Tri-State District, encompassing contiguous corner portions of Southwest Missouri, Southeast Kansas, and Northeast Oklahoma, has been, for many years, the leading zinc producer of the United States. However, rising labor costs and decreasing grade of ore reserves have meant that many of the mines gradually have become marginal in the economic character of their operations. In an attempt to counteract these adverse effects, steps were taken to attain lower cost mining methods, and mechanization has been introduced over a period of years. Further, the research program of the Eagle-Picher Company, the leading producer of the district, has been accelerated …

Copper Commando - Vol. 2, No. 24, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls

All Issues, Copper Commando, World War II

In this issue...war heros, Anaconda, "Killer" Kelly, Butte, France, invasion, England, copper, 75 million pounds, tanks, planes, guns, tramming department, smelter materials, Great Falls, safety department

Cornell University School Of Civil Engineering Tests On Light Beams Of Cold-Formed Steel, Cornell University School Of Civil Engineering

CCFSS Library (1939 - present)

I. SCOPE OF THIS REPORT In the Twenty-fifth Progress Report a series of twenty-three tests was reported on web crippling under concentrated loads. On the basis of these tests the design requirements of section 4.9 of the Tentative Specifications (April 1944 edition) were written. The scope of these tests, however, was not broad enough to insure safe design stipulations for all important cases for the following reasons: (a) Of the twenty-three tests six were conducted with roller loading (zero bearing length), and therefore are not represetative of acutal conditions. This leaves only seventeen representative tests. (b) all tests were conducted …

Cornell University School Of Civil Engineering Tests On Light Beams Of Cold-Formed Steel, Cornell University School Of Civil Engineering

CCFSS Library (1939 - present)

I. SCOPE OF THIS REPORT This report contains the complete evaluation of test results of the I-beam tests reported on in the 33rd and 34th Beam Reports. In considering the results of this evaluation, two factors should be kept in mind which adversely affect the accuracy of results: (l) These beams were designed primarily to serve as control specimens for future channel tests. Their usefulness in verifying the equivalent width approach is somewhat impaired by the fact that the compression flanges represent only a rather small part of the total cross-sectional area. Thus, a moderate change of equivalent width of …

Design Of A Submergible Seadrome Light--Universal Type--Suitable For Military Use In All Areas And For Transportation By Aircraft, Frederick Marion Mueller

Professional Degree Theses

"This thesis was written in consideration of problems arising in present day use of battery operated seadrome lights. The information contained has been compiled to explain the development of a radically new design in seadrome lighting. Use of a selected single lighted strip is the basis of the design. The seadrome light described is a submergible type and is essentially a modification and combination of the 100 watt beacon lights, used with the Type B-2 portable field lighting set; and the American Gas Accumulator Company Portable Lighting Set PAM-2. The beacon was modified in that it was made waterproof and …

Geological Reconnaissance Of The Coldwater River, Mississippi, Pinckney Ronald Mabrey

Professional Degree Theses

"This report was the result of an assigment [sic] to make a geologic reconnaissance of the headwaters of Coldwater River in northwest Mississippi, on which a site for a flood control dam had been made. At the time of the last field work in November, 1940, the boring program for borrow areas and for foundation had been completed.

The Sardis dam on the Little Tallahatchie River, some 35 miles southeast of site for the Arkabutla dam had been recently completed, it being the first of several designed for flood control purposes in the Yazoo basin, Mississippi. This was a hydraulic …

The Use Of Carbon Dioxide For Dislodging Coal In Mines, Durward Rice Schooler

Professional Degree Theses

"The coal mining industry prior to 1940, was undoubtedly facing a period when operating economies and efficient utilization of labor, machines and modern practices were more necessary than ever before. With its markets definitely threatened by other sources of heat and power produced with a minimum of labor, "Coal" had to exert every effort to secure the lowest possible production cost and also to produce a more satisfactory product with greater safety to men and mines...Many attempts have been, with various methods, to invent a method of breaking down coal that would fulfill the requirements stated above. In 1924 or …

The Combustion Of Phosphorus, Erwin Charles Hoeman

Professional Degree Theses

"Phosphorus first joined the ranks of large-tonnage industrial raw materials about ten years ago, with the development of the electric furnace method for its production from rock phosphate. For many years before the present era of large-scale production, phosphorus had been little more than a laboratory curiosity. Thereafter, it found extensive application in pyrotechnics, match tips, rat poisons, and other uses not requiring more than a few hundred of tons in a year. Phosphoric acids were generally produced by the reaction of sulfuric acid with rock phosphate. The development and growth of electro-thermal processes for the reduction of rock phosphate …

Cornell University School Of Civil Engineering Tests On Light Beams Of Cold-Formed Steel, Cornell University School Of Civil Engineering

CCFSS Library (1939 - present)

I. SCOPE OF THIS REPORT (1) Twenty-six tension tests were carried out on specimens cut from the steel from which the beams of the present series were formed. (2) Two specimens of beam 6 - 3 - 16 were tested in the same manner as described in the preceding report. These are replacement specimens furnished by the manufacturer for two beams damaged in the original shipment. (3) The greater part of the evaluation of the results of all twenty-six beam tests was completed and the entire evaluation will be discussed in the next report.