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Articles 21241 - 21270 of 21777
Full-Text Articles in Engineering
The Commercial Value Of High Iron And High Alkalie Diaspore, William Lucius Mccracken
The Commercial Value Of High Iron And High Alkalie Diaspore, William Lucius Mccracken
Bachelors Theses
"In a recent survey of the refractory field particularly regarding high iron and high alkali diaspore it was suggested that perhaps some of these impure clays had the proper flux content to make them a body of stable volume in the initial firing operation. At present there is an apparant sic lack of information regarding the commercial value of these impure diaspores. One of the great problems in the use of diaspore refractories is the lack of stability of volume while in service subjected to severe heat treatments of varying degrees"--page 3.
The Transmission Of Pressure In The Dry Pressing Of Typical Building Brick And Fire Brick Mixes As Affected By The Variation In Grog Size, Henry Rickel Herron
The Transmission Of Pressure In The Dry Pressing Of Typical Building Brick And Fire Brick Mixes As Affected By The Variation In Grog Size, Henry Rickel Herron
Bachelors Theses
"In the formation of dry pressed ware, the transmission of pressure is of vital importance to the quality and character of the finished product as regards the resistance to spalling, load at high temperatures, slag action, abrasion and other physical properties. Furthermore, the transmission of pressure is a limiting factor as regards the size and irregularity of shape of a product manufactured by the dry press process"--Introduction, page 1.
The Transmission Of Pressure In The Dry Pressing Of Typical Building Brick And Fire Brick Mixes As Affected By The Variation In Grog Size, Stanley John Tompach
The Transmission Of Pressure In The Dry Pressing Of Typical Building Brick And Fire Brick Mixes As Affected By The Variation In Grog Size, Stanley John Tompach
Bachelors Theses
"In the formation of dry pressed ware, the transmission of pressure is of vital importance to the quality and character of the finished product as regards the resistance to spalling, load at high temperatures, slag action, abrasion and other physical properties. Furthermore, the transmission of pressure is a limiting factor as regards the size and irregularity of shape of a product manufactured by the dry press process. Prior to the time of this investigation several companies have succeeded in producing ware up to six (6) inches in depth; but an increase over six inches has resulted, in every case, in …
The Effect Of Small Amounts Of Chrome Ore On Dry Press Diaspore Refractories, Allen John Reid
The Effect Of Small Amounts Of Chrome Ore On Dry Press Diaspore Refractories, Allen John Reid
Bachelors Theses
"The term "Diaspore" as used in this paper will be used to mean the diaspore clay from which refractory bodies are made. The pure mineral Diaspore (Al₂O₃ . H₂O) has an Al₂O₃ content of 85%, while the best grades of diaspore clay run from 76% to 79% diaspore. Diaspore clay consists of a varying percentage of diaspore, ranging from 60% to 79%, and the remaining percentage as clay. The most objectionable impurities which occure sic in diaspore clay are alkalies. The chief source of diaspore is the central part of Missouri. It occurs in pot hole formations accompanied by "flint" …
Pressure Transmission In Clays Affected By Time Of Pressure Application, Robert Edward Lee
Pressure Transmission In Clays Affected By Time Of Pressure Application, Robert Edward Lee
Bachelors Theses
"Experienced dry-press operators have long known that when they slow down their presses, to the proper speed they are able to exert more pressure on a wetter mix with out pressure cracks becoming apparent. When a clay mix is compressed in a dry-press there is a gradation of the pressure exerted, from the rams to the center, causing in some cases a soft centered brick. "Shelly brick", are undersirable sic because they do not have uniform physical properties through out. This weakens their structure, due to unequal stresses developed in drying and fireing sic. The defective structure of dry-pressed brick …
A Qualitative Study Of Arsine And Stibine Reactivity Toward Inorganic Salts In Certain Solvents, John Edgar Antener
A Qualitative Study Of Arsine And Stibine Reactivity Toward Inorganic Salts In Certain Solvents, John Edgar Antener
Masters Theses
"The effects of arsine and stibine on some substances have been investigated by various workers and recorded without any attempt at systematic classification. In this work a more comprehensive study of the precipitating effect of arsine and stibine on common inorganic salts in certain solvents, namely, water, ethyl alcohol, ethyl ether, acetone, carbon disulphide, carbon tetrachloride, chloroform, and benzene has been made, with an attempt at reactivity classification"--Introduction, page 1.
A Study Of Anode Corrosion And Its Influence On Cathode Purity In Electrolytic Zinc Production, Harold John Roesser
A Study Of Anode Corrosion And Its Influence On Cathode Purity In Electrolytic Zinc Production, Harold John Roesser
Masters Theses
"Anode corrosion is a problem with which electrolytic zinc producers have been concerned from the beginning of the practice. It has been attacked here from the view of modern practice, using alloyed anodes"--Introduction, page 1.
Flotation Of A Western Complex Ore, Guy Verdier Martin
Flotation Of A Western Complex Ore, Guy Verdier Martin
Masters Theses
"The flotation of the complex sulphide ore, which is the subject of this investigation, has been in progress on a large scale for several years. As the operation has been successful it follows that the ore dressing methods have been developed in much detail. For further improvements an intense investigation is required. The complex nature of the ore opens many avenues of research along some of which clues may be found that will lead to ultimate savings. It is along a few of these avenues that this investigation has been directed. Hence an effort was made to add to the …
Comparison Of Results Obtained On Ores From The Tri-State Zinc-Lead District After Grinding To Different Sizes And Concentrating By Flotation, Hans Maucher
Masters Theses
"The purpose of this investigation is to compare the phenomena observed in concentrating a zinc ore by flotation, using a constant and new flowsheet as described a few pages later and varying only the sizes to which the headsamples are ground previous to each test"--Summary, page 1.
The Lead And Zinc Deposits In The Sedimentary Rocks Of East Tennessee And Southwest Virginia, Joseph Hugh Reid
The Lead And Zinc Deposits In The Sedimentary Rocks Of East Tennessee And Southwest Virginia, Joseph Hugh Reid
Professional Degree Theses
"In its geographic and geologic relations this area forms a part of the Appalachian province, which extends from the Atlantic Coastal plain on the East to the Mississippi lowlands on the West and from Central Alabama to Southern New York. All parts of the region thus defined have a common history recorded in its rocks, its geologic structure and its topographic features"--Geography, page 1.
Producer Gas Practice In The Steel Industry, Horace Wilfred Hodges
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, …
An Engineer's Report Of A Lead And Zinc Mining Property, Ernest Moran
An Engineer's Report Of A Lead And Zinc Mining Property, Ernest Moran
Professional Degree Theses
"Gentlemen: Pursuant to your request, I have analyzed and classified the data relative to the Van Buren Mine of the Lucky Syndicate Mining and Smelting Company and beg to submit the following report. The lease is a lead and zinc mining property consisting of eighty (80) acres more or less..."--Letter to the Wright Mining & Royalty Co Miami, Oklahoma, dated December 9, 1929.
Data For Standard Curve Chord Steel Roof Trusses., William Hewitt Bush
Data For Standard Curve Chord Steel Roof Trusses., William Hewitt Bush
Professional Degree Theses
"In the past the Engineering Department of the structural steel company, by which the writer is employed, has been troubled with having to make a large number of preliminary steel truss designs for the purpose of estimating weights for competitive bids on structural steel building contracts. In order to eliminate this expenditure of time, a study was made of the possibility of making a standard design for curved chord steel roof trusses that would give the desired information by observation"--Truss Design, page 5.
Longface And Longwall Mining Methods Being Tried In Oklahoma Coal Fields, Earl Hollinger Mcalpine
Longface And Longwall Mining Methods Being Tried In Oklahoma Coal Fields, Earl Hollinger Mcalpine
Professional Degree Theses
"Of a number of long wall and long face mining methods in use in Oklahoma mines at this time, I shall outline four in this paper. Two of these methods are in use in mines which are comparatively level. The first of these is in the Kali-Inla mine near Hartshorne. The second is in the Milby-Dow Coal Company mine at Dow. The Mullen Coal Company mine near McAlester and the Hailey-Ola Company mine near Lutie are steep pitching mines"--page 1.
Geology Of Mohave County, Arizona, Earl Ross Householder
Geology Of Mohave County, Arizona, Earl Ross Householder
Professional Degree Theses
"Diamond Creek canyon is located in the eastern part of Mohave County and opens into the Colorado River. Limestones and sandstones of Carboniferous age are abundently [sic] exposed therein"--page 6.
The West Side Sewage Treatment Works Of The Sanitary District Of Chicago, John Edwin Mccauley
The West Side Sewage Treatment Works Of The Sanitary District Of Chicago, John Edwin Mccauley
Professional Degree Theses
"Herein following is a thesis on the West Side Sewage Treatment Works of the Sanitary District of Chicago. I have endeavored to cover a large field in one thesis, but think is giving the material I have, the fundamental points have been covered. The local need of sewage treatment is so involved with county, state, Federal, and even International issues that to write solely of local conditions would be to leave out the main part of the story. So, in writing, I have tried to dover enough of the subject to give the historical facts along with the construction side …
Some Compressed Air Tests At High Altitude, Thomas C. Robson
Some Compressed Air Tests At High Altitude, Thomas C. Robson
Professional Degree Theses
"These tests were made at one of the mines of the "Compania Minera de Potosi", situated in the Cerro Rico (Rich Hill) of Potosi, BOLIVIA, South America; to be used in a report of the General Mine Superintendent, to the mine owners, to show them, that to obtain better results in the compressed air plant, it was necessary to change the existing old compressors working underground"--Preface, page ii.
Oil And Gas Fields Of The Southern Gulf Coastal Plains Of Texas, Phillip Francis Martyn
Oil And Gas Fields Of The Southern Gulf Coastal Plains Of Texas, Phillip Francis Martyn
Professional Degree Theses
"The purpose of this report is to furnish a general outline of the oil and gas fields of the Southern Gulf Coastal plain of Texas. To properly cover the subject, the report is divided into three major parts, the first part dealing with the present and past producing territory, the second part dealing with the factors influencing the producing territory and the third section relating to geology and its associated subjects covering the area as a whole"--Introduction, page 1.
The Effect Of Occluded Air In Dry-Press Mixes, William Raymond Powell
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
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 North Side Sewage Treatment Works Of The Chicago Sanitary District, Floyd Allen Gerard
The North Side Sewage Treatment Works Of The Chicago Sanitary District, Floyd Allen Gerard
Professional Degree Theses
"My aim in writing this thesis has been to give a clear and concise picture of the Plant, its construction, operating experiences, results and the need for sewage treatment. For this reason, I have incorporated much information, which, while not dealing directly with the subject in hand, is closely allied to it and forms a very necessary background. As the Sanitary District considers its actual operating results confidential, I have refrained from including them. Much useful information can be derived from a careful study of the photographs and drawings included"--page ii.
The Effect Of Various Methods Of Grinding On The Physical Properties Of Unfired Dry Press Brick, Edwin Theodore Harvey
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
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
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
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
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
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 …
The Solubilities Of Alkali Chlorides And Sulfates In Anhydrous Alcohols, Emmet Rudolph Kirn
The Solubilities Of Alkali Chlorides And Sulfates In Anhydrous Alcohols, Emmet Rudolph Kirn
Masters Theses
"A search of the literature for data on the solubilities of inorganic salts in various anhydrous alcohols will show that comparatively little work has been recorded. Most of the work has been done on salts in aqueous normal alcohols and practically all of this data concerns only methyl and ethyl alcohols. This information shows a wide divergence in results with different workers. Perhaps these differences in data may be attributed to an error in that the alcohols may not have been absolutely anhydrous, for even small traces of water greatly affect the solubility of the salts. Again, the methods of …
A Study Of The Electrolytic Determination Of Lead, Philip Hall Delano
A Study Of The Electrolytic Determination Of Lead, Philip Hall Delano
Masters Theses
"The electrolytic determination of lead is one of the most used methods, particularly for control work and where large numbers of analyses have to be run each day. The method is adopted because of its simplicity and because of the small amount of the chemist's time required. It is particularly suited for the determination of small amounts of lead. However, it has been noted that deviations from certain conditions produce results which vary widely from the actual amount of lead present, though results which check with each other may be obtained. Certain elements interfere with the determination and must be …