Metallurgy Commons^™

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.

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.

Magma 1959, Associated Students Of The Montana State School Of Mines.

Magma 1948-1997

Any year book has as its prime purpose the depiction of a school year in a manner that will recall the maximum of memories in future years. The Magma this year utilizes memories as a theme, but places a slight accent on those of the graduating seniors.

The Vapor Pressures Of Pbo-Sb₂O₃-Sio₂ Mixtures., John Henry Smith

Masters Theses

"The removal of antimony is one of the important steps in the production of pure lead. The process of removing antimony from impure lead bullion is called "lead softening". The most common method used is to blow air into a bath of impure molten lead. The impurities, primarily antimony, arsenic and tin, if present, are oxidized and form a slag or "dross" which floats on the surface of the lead bath. A considerable amount of lead is oxidized in this step and joins the other oxidized compounds in the dross. This dross is skimmed from the bath of molten lead …

The Effect Of Rare Earth Additions On Low Alloy Steel, Sukh Dev Sehgal

Masters Theses

"Rare earth metals have for some years been used as an inoculant in nonferrous foundry practice and lately in the production of nodular iron. It has been reported that addition of rare earth metal to certain grades of stainless steel so improve the hot malleability that reduction of large size ingots in the blooming mill is now possible. It has been reported that considerable improvement in soundness and mechanical properties of steel castings and wrought products have been attained as a result of small additions of rare earth metals and oxides. In practically all investigations, it has been reported that …

Mechanization Of First Stage Graphitization In Fe- C-Si- Alloys, Dildar S. Gill

Masters Theses

"The purpose of this investigation was to study the mechanism of first stage graphitization in iron-carbon-silicon alloys in the light of results obtained by Taub, and to propose a new mechanism of graphitization. The results of preliminary experiments confirmed the findings of Taub as regards the precipitation of secondary carbides. Therefore, it was decided to extend the investigation so as to include the study of growth of secondary carbides. In order to know the chief factor responsible for the growth of secondary carbides, the activation energy was calculated. Another factor which was investigated was the site of graphite nuclei formation”--Purpose …

X-Ray Diffraction Study Of The Metal Powder Compacts, Rajendra Sharan

Masters Theses

"Various theories have been put forward about the mechanism of compacting and sintering processes. None of these theories are confirmed. The reason is that most of these theories are based on observations on metallographic specimens, which is not a particularly good tool for such a study. Little data using xray diffraction analysis is available and there seems to be a great need of making a thorough investigation in this direction.

The main object of this investigation is to study xray diffraction patterns of green compacts of aluminum, nickel and copper powders pressed under different compacting pressures to see if any …

The Effect Of Heating Chill Cast Eutectics, Robert Lewis Dreshfield

Masters Theses

"This investigation is the result of the author's specific interest in two phase systems. In the past, considerable work has been done investigating the alteration of eutectoid structures; however, eutectic structures have been neglected to a great extent. Tammann did some work on the subject in 1937 as did Brown and Guy in more recent times. In both of the above cases the eutectic structure was altered by cold working and subsequent heating of the alloy.

Tammann also noted that eutectics chill cast in liquid air display a vastly different structure than those cast under equilibrium conditions and that there …

Lattice Constants, Thermal Expansion Coefficients And Perfection Of The Phase Tio, Hsiung Wei Li

Masters Theses

"TiO is one of the intermediate phases in the titanium - oxygen system with a crystal structure of the sodium chloride type. The phase extends from about 22 to 29 weight or about 46 to 55 atomic percent oxygen. A comprehensive survey of the physical properties of the phase has been made in previous investigations (see review of literature), but only impure titanium was available at that time. Therefore, some revision of the measurements had to be made. Also, neither the thermal expansion coefficients nor the temperature at which the lattice constants were measured were reported.

For precision determination of …

A Study Of The Recrystallization And The Mechanical Properties Of Indium, Louis John Reitsma Jr.

Doctoral Dissertations

"The recrystallization temperature and the mechanical properties of tensile strength, elongation, reduction in area and hardness were determined for 99.97% indium. Metallographic techniques were developed and stress rupture data were obtained.

Single crystals of indium were grown in a horizontal furnace with a traveling temperature zone, and sectioned in a strain-free manner, with an etch-cutter. Because of the low recrystallization temperature of indium, no further work was done on the single crystals.

The effect of recrystallization on electrical resistance, thermoelectric force, hardness, bending strength, crystallographic orientation and microstructure was studied. The range of recrystallization temperature for small amounts of cold …

Imperfections Within Ti₂O₃ And Tio₂ Phases In The Titanium-Oxygen System, Tatsuhiko Ejima

Doctoral Dissertations

“The hexagonal-rhombohedral Ti₂O₃ phase in the Ti-O system extends from 32.5 to 34.5% oxygen b.w., with the exact composition of Ti₂O₃ nearly in the middle of the phase. Seven samples of different composition within that phase were made, and the lattice constants (a and c) and the density of each sample were determined.

The plots of the constants against the composition of the samples revealed a deviation from Vegard’s rule when approaching the exact composition of Ti₂O₃. The lattice constants of this compound, obtained by graphical interpolation were; a_{25 …}

A Thermodynamic Study Of The Zirconium Sulfides, Andrew Hessler Larson

Doctoral Dissertations

"A hydrogen reduction technique was used to determine some thermodynamic properties of various zirconium sulfide phases. The equilibrium H₂S/H₂ ratios were determined as a function of temperature and composition of the condensed sulfide phases. The hydrogen sulfide content of the equilibrated gas mixtures was analyzed by an iodimetric titration procedure.

A detailed description is given for the method and apparatus used both in the preparation of the various sulfide phases and in their equilibration with a hydrogen-hydrogen sulfide gas mixture.

The composition ranger 59 to 67 atomic per cent sulfur was studied over a temperature range of …

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 …

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 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.

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.

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.

Methods To Improve The Metallurgy Of Bolivian Tin Ores, Oscar Davila-Michel

Masters Theses

"Tin is a rare element; among the base metals it is one of the rarest. Although it was one of the first metals used by man and has been used since prehistoric time, the ore-dressing and metallurgical methods of tin are inefficient and very wasteful.

The only tin deposits of importance in the Americas are located in Bolivia, South America, and it is in Bolivia that the problems of tin metallurgy are greatest. More than 50% of the tin that is mined in Bolivia is lost in the tailing dumps of the beneficiation plants. In a country where the export …

The East Helena Plant Of The American Smelting And Refining Company, Raymond W. White

Bachelors Theses and Reports, 1928 - 1970

The East Helena plant of the American Smelting and Refining Company is a custom lead smelter. The chief product of the smelter is lead bullion, although by-products such as matte, speiss, cadmium-rich fumes, and zinc-rich slag are also produced. While the smelter is old, many of the methods used are new, some of which have been developed at the plant.

The Design And Construction Of A High-Temperature X-Ray Sample Holder For Use With The Norelco Diffractometer, Jerry F. Koon

Bachelors Theses and Reports, 1928 - 1970

The purpose of this paper is to describe the design and construction of a sample-holder for high-temperature x-ray diffraction work. This sample-holder will be used in conjunction with a Norelco Diffractometer. Design of this attachment is such that it will meet certain limitations, which will be presented in detail, offered by the diffractometer.

The Heat Treatment Of An Eight Percent Manganese-Titanium Alloy, Robert Alden Loucks

Bachelors Theses and Reports, 1928 - 1970

The subject of this particular investigation, manganese titanium alloy, has a sufficient amount of manganese present to retain beta upon quenching from the alpha plus beta or beta ranges. Thus, improvement of properties of this alloy is possible by selective heat treatments.

The Beneficiation Of A Low-Grade Uranium Ore, Frank P. Howald

Bachelors Theses and Reports, 1928 - 1970

The uranium in the Sponsor's Ore was proven amenable to the standard hydrometallurgical processes-- the acid leach and the carbonate leach. From an economical standpoint, the results of the heap-leaching and flotation studies were not favorable because of low recoveries. The possibility of employing an emulsion-induced selective flocculation flotation procedure still exists.

Artificial Rhodonite: It's Synthesis And X-Ray Diffraction Powder Pattern, Frank E. Jeniker

Bachelors Theses and Reports, 1928 - 1970

This report presents the investigation of three methods of synthesizing artificial rhodonite; fusion of silica and manganese dioxide, prolonged sintering of the compact of manganous carbonate and silica at below liquidus temperatures, and the precipitation by reaction of salts in an aqueous solution followed by sintering. In each case the rhodonitic product was of less than desired purity, containing varying amounts of silica, tephroite, and higher valence oxidized manganese forms, as well as aluminum.