Engineering Commons^™

Comparison Of Moe's Scale Of Hardness With The Rockwell, Brinell, And Scaleroscope Scales., Herbert William Hard

Bachelors Theses and Reports, 1928 - 1970

Moe's scale of hardness as used in mineralogy is admittedly rather indefinite, and no exact hardnesses are measured. The Rockwell, Brinell, and Scaleroscope machines give quite definite results which may be easily reproduced at any time.

The purpose of this investigation is to determine whether any definite relation exists between Moe's hardness and the hardness as measured by those machines commonly used for the determination of hardness of metals. If such a relation were found it would provide a more definite and accurate measure of the hardness of minerals.

Constitution And Specific Gravity Of The Ternary Mattes Cu2S-Sb2S3-Pbs, Herbert William Hard

Bachelors Theses and Reports, 1928 - 1970

The constitution of the ternary mattes Cu₂S PbS Sb₂S₃ has never been completely investigated nor has there been any attempt to draw the complete ternary diagram. The following work is intended to [be] a contribution towards completion of this diagram by determining the specific gravity of different mattes and by pointing out some which show peculiarities of structure.

Pipes In Steel Ingots As Exemplified By Casting Wax, Herbert William Hard

Bachelors Theses and Reports, 1928 - 1970

This paper presents some experimental data on the size and position of pipes steel ingots as exemp1ified by casting wax under various conditions and noting the size and location of the pipes formed.

The results tend to show that the length of the pipe is decreased by:

1. Slow casting

2. By casting large end up instead of down

3. By retarding the cooling of the top

The Effect Of Cobalt Upon Current Efficiency In The Electrolysis Of Zinc Sulphate Solutions, Joseph Newton, Louis Sanders Nuckols

Bachelors Theses and Reports, 1928 - 1970

The detrimental effect of the presence of cobalt upon the current efficiency, in the commercial production of zinc by electrolysis, has been recognized for some time. Most authorities differ upon the maximum amount of cobalt allowable. This is due to the fact that the presence of other impurities either increases or diminishes the detrimental effects of the cobalt.

The following tests were made with the object in view of ascertaining the relation, if any, between the amount of cobalt present and the current efficiency during the electrolysis of an otherwise pure zinc sulfate solution.

The results obtained from these observations …

Producer Gas Practice In The Steel Industry, Horace Wilfred Hodges

Professional Degree Theses

"The sources of energy for the industries are: 1. Water power; 2. coal, lignite, peat and Wood; 3. Natural and Artificial Gas; 4. Oil; 5. The Sun;s Rays; 6. The tides. The latter two sources may be eliminated from immediate practical use, owing to their cost and limited application. Therefore, the burden for many years will rest upon Water power, coal, gas and oil. We may also eliminate water power from the source of energy of the steel industry, due to the Mill's geographical location. Hence, for the near future, the steel industry's soul rests upon the production of coal, …

The Effect Of Occluded Air In Dry-Press Mixes, William Raymond Powell

Bachelors Theses

"The effect of occluded air in clay mixes has recently become a subject of considerable importance especially since some of the defects occuring sic in dry-press ware, such as cracks and soft or granulated centers, have been either partially or wholly attributed to occluded air. According to this theory, the defects are due to the entrapping of air among the clay grains before compression, which, when the pressure is released, has a tendency to expand and cause a rupture in the bond. Also granulated centers have been explained by the fact that the entrapped air may act as a cushion, …

The Testing Of Steel For Wear By Abrasives, Thomas Evan Eagan

Professional Degree Theses

"The tests herein reported were conducted with the idea of finding a steel which would give improved wear as roll shells in the comminution of ores...Not only must the wear be considered, but also the physical properties. It is desirable to have a steel of such Tensile and impact values that no failure by breakage would occur until the shell was worn very thin. The ideal condition being to wear the shell down to zero thickness, but such cannot be accomplished"--Introduction, page 2.

The Effect Of Various Methods Of Grinding On The Physical Properties Of Unfired Dry Press Brick, Edwin Theodore Harvey

Bachelors Theses

"In the manufacture of dry press brick, the final grinding of the clay is usually done in a dry pan. This is especially true of fire brick made by the dry press method. It is logical to assume that different types of grinding machines will impart different characteristics to the ground clay mix, as regards the grain size variation and the shape of the grains, which in turn will have an effect on the properties of the brick. The purpose of this investigation was to determine what effect different types of grinding methods have on the physical properties of unfired …

The Transmission Of Pressure In The Dry Pressing Of Typical Building Brick And Fire Brick Mixes As Affected By The Degree Of Pressure, Physical Character Of Mix Ingredient, And The Moisture Content Of The Mix, Ferdinand Frederick Netzeband

Bachelors Theses

"In February, 1929, the Dry Press Committee of the National Brick Manufacturers Association, in cooperation with the department of Ceramics of the Missouri School of Mines and Metallurgy, began several investigations relating to dry press ware. This Committee suggested a great number of possible investigations, and are now systematically proceeding along these lines. This investigation has for its object: (1) The transmission of pressure in the dry pressing of typical building brick and fire brick mixes as affected by the degree of pressure; and (2) As affected by the moisture content of the mix. this thesis contains a description of …

A Fire Clay Cement Study, Willard E. Davis

Bachelors Theses

"The purpose of this investigation was to develop a satisfactory boiler setting cement from a semi-flint fire clay. This clay is now being mined and used to make refractory ware by the Wellsville Fire Brick Company, Wellsville, Missouri. It has been my intention of using only those materials which have been used by this company and following the same preparation of the clay, that is, using the machinery which is at present available in the plant"--Introduction, page 3.

Disintegration Of Ozark Plastic Fire Clay In The Drier, Elmer Francis Cirkal

Bachelors Theses

"During the procedure of testing Ozark Plastic Fire clay in 1928-29 a few of the test bars were unintentionally left in a laboratory drier and after some months it was found that these bars were decidedly disintegrated into a powder without any known special treatment...In order to properly investigate the cause of this phenomena it was decided to repeat the experiment under similar conditions so that no error could enter the investigation which would cause any deviation from the results previously obtained "--pages 1 -2.

Mechanical Treatments Of A Missouri Fire Clay And Their Effect On Shrinkage, Porosity And Strength, Allen Richard Maune

Bachelors Theses

"It is known that various kinds of mechanical treatments of clay before and during the forming operation will produce variant properties in the dry and burned states of the clay. The investigation here deals with several types of mechanical treatment before the forming operation; all forming being done by moulding by hand"--Introduction, Purpose of the Investigation, page 1.

The Determination Of The Alumina Content In Diaspore And High Alumina Clays, W. D. Keller

Bachelors Theses

"The determination of the alumina in diaspore and kindred high alumina clays has been a problem which has attracted the interest of ceramists and chemists ever since a sample of Missouri diaspore was first sent for analysis to the laboratories of the Missouri School of Mines and Metallurgy in 1917...It is the writer's intention to review in this paper the various published methods for the determination of alumina in high alumina clays and to present a new indirect one that after some months' use in industrial practice, fulfills, in some measure at least, the need outlined above"--Introduction, page 1 -2.

The Transmission Of Pressure In The Dry Pressing Of Typical Building Brick And Fire Brick Mixes As Affected By The Degree Of Pressure, Physical Character Of Mix Ingredient, And The Moisture Content Of The Mix, George Ava Page

Bachelors Theses

"In the manufacture of dry press brick, the final grinding and tempering of the clay is usually done in a dry pan. The next operation is forming the ware by means of applying pressure, either mechanical or hydraulic. The actual pressure that a brick is subjected to in a mechanical press has always been a question...The purpose of this investigation was to determine what effect would be imparted to the brick by varying the forming pressure and keeping the water content constant, and what effect would be imparted by varying the water content and keeping the forming pressure constant, on …

Laboratory Concentration Of The Missouri Iron Ores Of Iron Mountain And Pilot Knob, Strathmore Ridley Barnott Cooke

Masters Theses

"The purpose of this investigation was to ascertain whether the more important iron ores of Missouri would be amenable to beneficiation to produce high grade concentrates. In the southeastern section of Missouri are found many small deposits of high grade iron ores, and a few large deposits of comparatively low grade ore. The former consist chiefly of red and brown hematite and limonite ores that are in no need of beneficiation. the low grade iron orebodies are relatively large in extent, and, if they could be beneficiated successully [sic] and economically would be of value. Accordingly, the major portion of …

Salts In Tri-State Mill Waters: Their Ill-Effect On The Flotation Of Zinc And Their Removal, Warren Lincoln Howes

Masters Theses

"The application of the flotation process has become one of the greatest innovations in modern ore dressing. In a comparatively short span of years it has grown to be one of the most powerful tools of the ore dressing engineer. Flotation is particularly adapted for the recovery of finely ground mineral and has thus enabled the miner to open up enormous deposits of low grade, disseminated ores for profitable treatment. In conjunction with other methods, the process has raised the recovery in practically every ore dressing plant by the treatment of slimes which otherwise would go to waste, carrying valuable …

A Power Study Of A Laboratory Ball Mill, Frederick Clearman

Masters Theses

"Ball milling practice in the ore dressing industry is largely empirical. Although many investigators have worked on various of its phases, the present operating methods are mostly a matter of cut-and-try, with the result that the industry is not guided by its underlying principles. Consequently, practice varies extensively with regard to nearly all conditions of operations. Even in neighboring concentrators such factors as speed, ball charge, and ore load differ in similar ball mills. Since fine grinding is continually becoming of more importance, and often accounts for thirty per cent of the milling cost, it is very necessary that a …

Constitution And Specific Gravity Of The Ternary Mattes Cu2S-Fes-Pbs., William Earl Lindlief, John Otto Groh

Bachelors Theses and Reports, 1928 - 1970

The constitution of the ternary mattes CU₂S-FeS-PbS has never been completely investigated. Fulton and Goodner 1) have investigated the binary mattes CU₂S-FeS, CU₂S-PbS, PbSFeS and have shown that the three binaries show eutectics. There has been no attempt however to draw the complete ternary diagram. The following work is intended to be a contribution toward the completion of this diagram by first of all pointing out those mattes which separate on melting into two layers, and second by determining the specific gravities of mattes of different compositions.

The Effect Of The Cu:Fe''' Ratio Upon The Current Efficiency In The Electrolysis Of A Copper Sulfate Solution Containing Iron Sulfate, Joseph Thomas Roy, Francis Carroll Moran

Bachelors Theses and Reports, 1928 - 1970

It is a well-known fact that, in the electrolysis of a CuSO₄ solution containing iron sulfate, using insoluble anodes, with the depletion of copper, the point is finally reached where the current efficiency becomes zero. This decrease in current efficiency is due to the oxidation of the ferrous sulfate to the ferric condition at the anode, by the oxygen liberated. The resulting ferric sulfate diffuses over to the cathode and there dissolves copper from the cathode according to the chemical equation Cu + Fe₂ (SO₄)₃ = CuSO₄ + 2FeSO_4. This copper, which has …

The Coarse Crushing Plant Of The Desloge Consolidated Lead Company, Horace Reynolds Stahl, Robert Gibson O'Meara

Professional Degree Theses

"The Desloge consolidated Lead Company is located at Desloge, Missouri, in the disseminated lead district of St. Francois County. The crushing plant was built during 1925 to replace crushing installations at three mines. The plant was designed to deliver 2,000 tons of 7 to 9 mm. feed per day to the concentrating plant. Operating conditions have since improved so that the present tonnage is about 2,200 toms of 6.5 mm. feed per day, operating 16 hours. The essential mineral is galena, more or less finely disseminated in a dolomitic gangue. The ore is comparatively soft and easily crushed"--Introduction, page 1.

Florida Kaolin As The Chief Clay Ingredient For A Sanitary Ware Casting Body, Hugo Logan Harrod

Bachelors Theses

"The purpose of this investigation was to utilize a large percentage of Florida Plastic Kaolin in a new sanitary ware casting body. Such a body, when worked out to be satisfactory, could be produced at a lower cost than those bodies being used in American plants at present. This particular plastic kaolin is available in large quantities in the southeastern portion of the United States. It is the intention of this work to substitute this American clay for the more costly imported English China Clay now being used in sanitary ware casting bodies"--Introduction, Purpose of the Investigation, page 1.

A Study Of Chrome And Diaspore Mixes, Harlow Guy Jones

Bachelors Theses

"The high refractoriness of both chrome and diaspore make them very valuable to the refractory industry. Chrome ore has been experimented with since 1879 and used in brick form since 1886. Diaspore on the other hand, has just recently been recognized as a refractory After going through all the available literature on the subject I have been unable to find any mention of any work carried on in which mixtures of chrome and diaspore were used"--page 1.

Beneficiation Of Manganese Ores, Michael V. Healey

Masters Theses

"The purpose of this investigation is to study the means of beneficiating domestic manganese ores in order that a marketable product may be made. Within the limits of the paper the term "Manganese ores" is applied to those ores mined primarily for their manganese content, to the exclusion of manganiferous iron and silver ores"--Object, page 1.

Cone Deformation Eutectics Using Sodium Chloride, Dolomite, And Alpite Rock, William K. Schweickhardt

Bachelors Theses

"Heterogeneous Equilibrium, alone, is an extensive study in itself and no discussion of it will be given here. It is known from this study that different phases are formed in various systems, the system consisting of two or more components. Some systems form an eutectic, which is a mixture of two solids which combine to form a liquid at a lower degree of temperature than either of the milting points of the two solids, as shown in the two component system of KCl and LiCl¹; some systems form solid solutions in which there is no eutectic formed, and the solids …

Difference In Pyrometric Cone Equivalent Between Raw And Calcined Clay, Charles Alfred Freeman

Bachelors Theses

"In a recent survey of the refractories field with particular respect to the Pyrometric Cone Equivalent of different clays it was suggested that a difference in the P. C. E. value of clays might be found due to different stages of heat treatment that these clays had previously undergone. At present there is considerable apparent lack of information regarding this problem. It is evidenced largely in the samples of clay sent into commercial testing and research laboratories by manufacturers who are attempting to develop definite properties from a given clay or clay body. There is a large difference in the …

On The Permanent Growth Of Grey Iron, Walter Edward Remmers

Professional Degree Theses

"After making a survey of the available information on the subject of permanent growth in grey iron castings, it was found that very little definite information is available and such as is available does not seem to satisfy all conditions. As is perhaps generally known, grey iron castings withstand a growth in volume upon repeated heating and cooling, which growth is a permanent deformation and is not a function of the temperature co-efficient"--Review of Published Work, page 3.

Effect Of The Use Of Old Retorts As Grog And Of Zinc Oxide Upon The Properties Of Bodies For The Manufacture Of Retorts, Elmer Gammeter

Masters Theses

"In the fall of 1924 the Mississippi Valley Experiment Station of the United States Bureau of Mines, Department of Commerce, in cooperation with the Missouri School of Mines and Metallurgy began an investigation of the properties of raw materials used in the manufacture of retorts for the zinc industry. The investigation proceeded cooperatively until December, 1926, when the Bureau of Mines withdrew from ceramic research. The School then took over and is completing the problem as outlined. The first phase of the investigation had for its object the determination of the properties of the fireclays and body mixtures now in …

Electrothermic Dry Distillation Of Zinc, Ira Nathan Goff

Masters Theses

"Although the work described in this thesis cannot be considered as complete, until certain mechanical changes have been made and the furnace operated continuously over a considerable period of time, this electrothermic dry distillation process for the extraction of zinc from ores offers excellent commercial possibilities. The literature has been reviewed, the process that was used at East St. Louis described, and the results of work at the Mississippi Valley Experiment Station of the United States Bureau of Mines, Department of Commerce, Rolla, Missouri along the line of electrothermic metallurgy of zinc considered"--Summary, page 58.

The Properties Of Refractories In Zinc Metallurgy. Part Iii. Comparison Of Various Clays, Richard Elkanah Sears

Masters Theses

"This thesis...contains a description of a part of a general investigation on the subject of the refractories used in the distillation of zinc. This investigation has been in progress for the past eighteen months at the Mississippi Valley Experiment Station of the United States Bureau of Mines, Department of Commerce, in cooperation with the School of Mines and Metallurgy of the University of Missouri. The first phase of this investigation had for its theme the determination of the properties of the fire clays and body mixtures now used in the manufacture of zinc retorts. The second phase deals with the …

A Granular Briquet Resistance Furnace For The Electrothermic Dry Distillation Of Zinc Ores, William Mckinley Kahlbaum

Professional Degree Theses

"The work here described had for its purpose the development of a granular briquet resistance furnace for the electrothermic dry distillation of zinc ores"--Introduction, page 1.