Engineering Commons^™

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.

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.

A Study Of The Chemical Factors Affecting The Rheological Properties Of A Quartz-Bentonite Suspension In Water, Harold Bruce Treweek

Bachelors Theses and Reports, 1928 - 1970

Frequently, difficulties are encountered with mineral pulps in a mineral-processing plant, which are not alleviated or minimized by the application of such simple measures as varying fineness of grind of solid material, changing pulp density, or altering equipment operation (within practical limits). The basis of the difficulty in such a situation may be found in the very nature of the pulp-- its flow characteristics and behavior. Recognition of the problem followed by one-point viscometric measurement to determine fluidity can lead an operator to erroneous conclusions. Underlying this difficulty is the lack of technical literature concerning the application of ion exchange …

The Extraction Of Titanium From Titaniferous Magnetite, Roger N. Dokken

Bachelors Theses and Reports, 1928 - 1970

The titanium in the titaniferous magnetite under study, as well as most other titaniferous iron ores, is so intimately associated with the iron that liberation cannot be achieved by mechanical means.

It is obvious from the preliminary investigations that some chemical means must be utilized from efficient extraction of the titanium. Two possible pyrometallurgical methods for this extraction are either soda sintering or direct smelting.

The Zone-Refining Of Aluminum And Magnesium With Copper As The Major Impurity, 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.

The Reduction Of Chromium Oxide In A Vacuum Furnace, Raymond W. White

Bachelors Theses and Reports, 1928 - 1970

Interest in vacuum metallurgy has grown considerably in recent years. High vacuum techniques are of fundamental importance as research tools in defining the properties of pure metals, in the extraction and processing of reactive metals, and are becoming increasingly important in commercial metallurgical processes. Much of the work described in recent literature has centered on applications of vacuum to commercial annealing, degassing, distillation, and melting and casting processes.