Engineering Commons^™

Copper Converter: Basic Research Testing With A Plastic Model Converter And Four Types Of Refractories, Arthur C. Bigley Jr.

Bachelors Theses and Reports, 1928 - 1970

In recent years there has appeared an increasing number of papers on converting operations as related to thermodynamics. This approach is a powerful, potential tool. However, the development of new ideas and changes must rely on accurate basic information.

Microradiography Of Metals And Alloys Using A Medical X-Ray Unit, W. R. Byrne

Bachelors Theses and Reports, 1928 - 1970

There is no doubt that the microradiograph technique is of value to the metallurgist. A three-dimensional picture to supplement the photomicrographs should give a true picture of the microstructure. Microradiography can be used where etchants can not differentiate between the various components or where no etchant can be found suitable for a particular alloy.

Secondary Recrystallization In Copper, James E. Thompson

Bachelors Theses and Reports, 1928 - 1970

The purpose of this thesis is to study the conditions under which secondary recrystallization will take place in copper. The variables considered were the time annealing, the temperature of annealing, and the degree of cold work undergone by the specimen before it was subjected to the heat treatment.

Comminution Studies, George A. Grandy

Bachelors Theses and Reports, 1928 - 1970

Comminution, reduction in size, is one of the most important, yet least understood, steps in mineral dressing. So that more efficient comminuting devices may be designed and constructed, a better knowledge of the relationship between energy consumption and size reduction is desired. Occasional studies during the last 100 years have produced a few "laws" purporting to describe this relationship. In each case, the promulgators and supporters of these laws have presented experimental evidence for their verification. Obviously, all of these advocated practices cannot be correct. To the mill designer, the problem is "Which, if any, of these laws are valid." …

Growth Of A Preferentially Oriented Aluminum Single Crystal, John George Bjeletich

Bachelors Theses and Reports, 1928 - 1970

When studying some anisotropic property of a specific metal, such as the critical shear stress of aluminum, it is desirable that the test specimen be a single crystal with the crystal axes preferentially oriented. Therefore, it is necessary to obtain a single crystal by one of the methods mentioned and by use of x-rays to determine the orientation. Once the single crystal is obtained and the orientation known, it is possible to grow a preferentially oriented aluminum single crystal by a method generally known as "seeding". The purpose of this thesis problem was to grow a crystal by utilizing the …

The Identification Of Montana Clays By X-Ray Analysis, James Francis Donovan

Bachelors Theses and Reports, 1928 - 1970

This investigation is concerned primarily with the determination of the various clay minerals comprising certain deposits through the state. This investigation was accomplished with the use of X-Ray diffraction equipment and it can be easily understood why this equipment has been of such benefit to the clay mineralogist.

The Macromosaic Structure Of Lead Single Crystals, Eldon J. Nicholson

Bachelors Theses and Reports, 1928 - 1970

The purpose of this investigation is to examine this structure [macromosaic] to determine any properties or characteristics peculiar to it that could shed light on its cause or on the basic mechanism of crystal growth from the melt.

Autoclave Leaching Of Montana Chromite, Leonard S. Greely

Bachelors Theses and Reports, 1928 - 1970

The purpose of this investigation was to determine the feasibility of caustic autoclaving of Montana chromite in order to recover the chromium in a relatively pure solution of sodium chromate.

An Investigation Of The Fundamental Factors Affecting The Green Ball Characteristics In Pellet Formation, Thomas J. Wright

Bachelors Theses and Reports, 1928 - 1970

The purpose of this investigation is to determine the relative effects on the quality and characteristics of the pellets. Once the major factors effecting agglomerating materials are understood, formerly poor and nonagglomerating materials may be affected so that they will produce good quality agglomerates. Should the factors prove difficult to vary or impossible at least they may be identified and understood, thus serving as a guide for further attack or judgment in overall process design.

Identification Of Inclusions In Armco Ingot Iron By The Use Of Polarized Light, Carl A. Plate

Bachelors Theses and Reports, 1928 - 1970

It is the author's hope that by systematically investigating the inclusions in ingot iron and comparing their specific properties with the properties of substances known to exist as inclusions, a rapid and accurate method may be found to identify them using a polarizing microscope. Where possible photomicrographs will be used to illustrate the results obtained so that the reader may obtain a better picture of the effects produced by polarized light.

Electrical Methods Of Mineral Concentration, Gordon F. Ziesing

Bachelors Theses and Reports, 1928 - 1970

The evaluation of a mineral-dressing method cannot be carried out successfully without an initial understanding of the basic fundamentals and concepts governing the operation of the method. Experimentation, governed by the understanding of the basic concepts, together with intelligent conclusions based on the experimental data, complete the evaluation of the dressing method.

Electrical concentration, being the given dressing method, will be evaluated as discussed above. As they are thoroughly covered by Mora (13), the fundamental concepts will not be given a lengthy discussion.

Separation And Concentration Of Stibiconite, William Howard Painter

Bachelors Theses and Reports, 1928 - 1970

Primarily, the purpose of this study is to separate stibiconite from associated gangue minerals. The ore containing antimony, as an oxide stibiconite, occurs in Mexico and its benefication would be an advantage to the mineral resources of that country. While the deposit from which this ore is derived is American owned, the resource is presently non-economic. A concentrate must be derived of suitable grade for its use in a smelting operation and from which metallic antimony would be produced.

An Investigation Of The Effectiveness Of Certain Organic Compounds In The Flotation Of Manganese Oxide Minerals, Johannes P. Dreyer

Bachelors Theses and Reports, 1928 - 1970

This thesis has to do with the selective flotation of the manganese oxide minerals in an ore from Charco Redondo Mine, Oriente Province, Cuba. Since a sound knowledge of the nature of the emulsion-induced flotation process of these minerals does not exist, experimental research constitutes the most valuable resource for determining the extent to which different reagents influence the process. Moreover, a correlation of experimental results with the chemical and physical properties of the minerals and reagents can lead to the improvement of existing theories regarding the mechanism of a process.

Streaming Potential Studies On Rutile, Albert R. Rule

Bachelors Theses and Reports, 1928 - 1970

This investigation was undertaken to determine some of the electrokinetic properties exhibited by rutile in solutions of various electrolytes. Results presented in this thesis are for rutile in solutions of conductivity water and in potassium chloride solutions. The data obtained in this investigation are presented graphically in the body of the thesis and are tabulated in the appendix for convenience.

Stress-Induced Martensite Transformation In An Alloy Of The Copper-Aluminum-Nickel System, Gary D. Alexander

Bachelors Theses and Reports, 1928 - 1970

It was intended that the alloy be thoroughly investigated for martensite transformation that would make the alloy "super-elastic," but due to the many difficulties that arose this was not possible. Attempts to grow a single crystal from the cast alloy were not successful because of the difficulties that were encountered with the Kanthal resistance furnace (referred to later). Consequently, the growing of the single crystal was abandoned and the alloy was tested in the poly-crystalline form.

Electric Arc Furnace Production Of Standard-Grade Ferromanganese, Curtis Bates

Bachelors Theses and Reports, 1928 - 1970

The purpose of this investigation is to determine an operating procedure for electric arc furnace production of standard ferromanganese. An attempt was made to determine a charge which would give steady power consumption in the furnace and at the same time keep the manganese content in the slag to a minimum.

Growth And Examination Of Calcium Single Crystals, Richard W. Roberts

Bachelors Theses and Reports, 1928 - 1970

This report is in two sections. The first section relates to a vacuum technique for growing single crystals of calcium. The second section discusses the results of an X-ray examination of crystals of zinc by the back reflection Laue method.

The Identification Of Montana Clays By X-Ray Analysis, David Stephen Malyevac

Bachelors Theses and Reports, 1928 - 1970

The purpose of this study is to identify the various Montana clay minerals by means of X-ray diffraction. The ultimate aim of this investigation is to identify the different clay mixtures through an analysis of their respective diffraction patterns, and diffraction patterns obtained after various chemical and thermal treatments.

The Identification Of Montana Clays By X-Ray Analysis, George Mason Maxwell

Bachelors Theses and Reports, 1928 - 1970

This thesis is to be written with the assumption that the reader is familiar with the more elementary facts of X-ray crystal analysis, such as the production and properties of X-rays, and the Bragg reflection law.

The purpose of this paper is to report on the investigations carried on to find some relatively simple means of identifying Montana Clays.

The Mono-Rail Timber Transfer, James D. Wallace

Bachelors Theses and Reports, 1928 - 1970

My report covers the desire and need for a practical machine of this type to save labor, time and fatigue in underground timber transportation. A design is suggested including description, sequence of operation, design details and calculations.

Electrolytic Refining Of Copper By The Series System, Jerome Yopps

Bachelors Theses and Reports, 1928 - 1970

The purpose of this thesis investigation was to determine the characteristics of the series system of electrolytic refining of copper.

Metallurgical Applications Of Polarized Light, Kenneth R. Evans

Bachelors Theses and Reports, 1928 - 1970

Very little has been written concerning the theory of the metallurgical polarization microscope. Records of metallurgical studies utilizing this instrument are widely scattered among the literature, and are mostly material of an uncoordinated and irrelevant nature. It is the feeling of the author that a coordinated investigation of the metallurgical applications of polarized light will yield results providing the metallurgist with another means for the study of metals and their properties.

Back-Reflection Camera, Charles T. Burtch

Bachelors Theses and Reports, 1928 - 1970

The following paper is a record of the procedure used to construct a back-reflection camera. It will also discuss the difficulties encountered and some of the methods used to eliminate or reduce them.

The Application Of Amalgam Metallurgy To Copper, Barry J. Hansen

Bachelors Theses and Reports, 1928 - 1970

The object of this investigation is the application of "Amalgam Metallurgy" to the extraction of copper from its ores. "Amalgam Metallurgy" as defined by Hohn is the use of liquid mercury in the extraction of metals. The ore under study was from the Kelly Mine in Butte, Montana and contains about 1.0% copper of which about 0.1% is acid soluble.

Production Of Standard-Grade Ferromanganese In An Electric Arc Furnace, John P. Hager

Bachelors Theses and Reports, 1928 - 1970

The original purpose of this thesis was to determine the feasibility of producing standard-grade ferromanganese from the Cuban concentrates using an electric arc furnace. This purpose was later changed since it became necessary to study the adequacy of a laboratory electric arc furnace for comparability with commercial operations.

Since the original purpose of the investigation had been changed while the area of investigation had not, the research work was then continued with the purpose of collecting information on ferromanganese production as a background for anticipated future work in pyrochemical research at the Montana School of Mines.

Ferromagnetism In Some Alloys Of The Copper-Manganese-Tin System, Leonard W. Boyd Jr.

Bachelors Theses and Reports, 1928 - 1970

The specific purpose of this investigation is to study the effects of heat treating at various temperatures for different lengths of time, with special attention paid to changes in magnetization. Identical heat-treating conditions were used on several different alloys, the compositions of which are such that some specimens are in the single-phase beta prime and beta regions, whereas others are in two-phase regions. For this investigation, only magnetic measurements will be attempted.

A Portfolio Of Advanced Mining Equipment Ideas, George L. Wilhelm

Bachelors Theses and Reports, 1928 - 1970

This paper presents a series of idealized sketches and accompanying descriptions of mining equipment. The ideas contained herein apply broadly to the mechanization of underground mining and development. Considered here are new techniques of material handling, drilling, mucking and rock transportation.

The Effects Of Acid Concentration On The Current Efficiency During The Electrolysis Of Zinc Sulfate Solution, Jon Langfeldt

Bachelors Theses and Reports, 1928 - 1970

The current efficiency during the electrolysis of zinc sulfate solution and the various factors that effect the current efficiency are major considerations of this industrial process. The factors affecting current efficiency-- temperature, current density, presence of impurities, time of electrolysis, hydrogen overvoltage, smoothness of the deposit, and acid concentration of the cell solution-- are controlled to the extent that current efficiencies of 90-93% are not uncommon in the industrial electrolytic zinc process. However, additional investigations of the effects of these various factors upon current efficiency are warranted, because of the endless search by the non-ferrous metal industries for additional information …

Attrition-Flotation Of Low-Grade Cuban Manganese Tailings, Donald E. Zipperian

Bachelors Theses and Reports, 1928 - 1970

The primary objective of this project was to develop a process that would yield a salable product from the manganese tailings and to evaluate the economical gain that might be achieved from such a venture. From the nature of the tailings and early flotation research, it became apparent that selective flocculation and subsequent gathering of the manganese-oxide minerals into agglomerates was the key factor to be considered in the flotation testing.

The Zone-Refining Of Aluminum With Copper As The Major Impurity, Arlan Edward Rathke, Russell E. Hoar

Bachelors Theses and Reports, 1928 - 1970

The purpose of this paper is to report on the investigation of the possibility of removing impurities from the two important light metals, aluminum and magnesium, by applying the principles of zone-refining. The impurities in these metals are namely iron, silicon, and copper, which is the main impurity. Copper and iron come from the reduction cells, while silicon is introduced during the preparation of the material for the reduction bath.