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Articles 2101 - 2130 of 2218

Full-Text Articles in Materials Science and Engineering

Georgia Kaolin As The China Clay Constituent In Floor And Wall Tile Bodies, Alfred Arthur Mitchell Jan 1931

Georgia Kaolin As The China Clay Constituent In Floor And Wall Tile Bodies, Alfred Arthur Mitchell

Bachelors Theses

"The replacement of the China Clay content in vitreous floor tile and porous wall tile bodies wholly by Georgia sedimentary kaolin would reduce the cost of these bodies being used in our floor and wall tile plants at present. This plastic kaolin is available in large quantities in the State of George, covering an area of about 7500 square miles. It is the intention of this work to substitute this American Clay for the more costly imported English China Clay now being used"--Introduction, page 1.

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The Effect Of Bentonite On The Transmission Of Pressure In Green Dry Press Blocks, Charles William Mccaw Jan 1931

The Effect Of Bentonite On The Transmission Of Pressure In Green Dry Press Blocks, Charles William Mccaw

Bachelors Theses

"The object in view in this work was to study the effect of the addition of bentonite on the pressure transmission of dry pressed ware, consisting of plastic fire clay. It was hoped that the bentonite would improve the transmission of the pressure to a noteable extent, forming a stronger, more evenly pressed block than has before been accounted for. This would facilitate the dry pressing of block that tended to crumble and disrupt from excessive pressure, allowing the ware to be pressed harder, and therefore making a more dense product"--Reasons For Investigation, page 4-5.

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Disintegration Of Green Missouri Fire Clay Bodies At Low Temperatures, Wilbur Brooks Schofield Jan 1931

Disintegration Of Green Missouri Fire Clay Bodies At Low Temperatures, Wilbur Brooks Schofield

Bachelors Theses

"Several years ago in the Ceramics Lab. of the Missouri School of Mines some A. P. Green Ozark Clay test pieces were left in a drier for a period of about seven months at a constant temperature of 110C. At the end of this period it was noticed that these specimens had disintegrated and crumpled down to a powdered mass. The object of this experiment was to repeat the former test and see if the clay would disintegrate and if so why. We also wished to find if by drying at higher temperatures for a shorter length of time would …

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Size And Shape Of Clay Grains As Affected By Various Methods Of Grinding, Henry William Meyer Jan 1931

Size And Shape Of Clay Grains As Affected By Various Methods Of Grinding, Henry William Meyer

Bachelors Theses

"It is a common belief among those persons manufacturing dry pressed brick that the shape of grain of the clay used for this purpose would materially affect the physical properties of the resultant product. Some believe that clays, dry pan-ground, give a better product than clays disintegrated mechanically or passed through rolls. In some recent dry press investigations it was found that some milling methods gave an advantage over other methods, in the matter of pressure transmission. Due to this, a possible cause for the advantage was attributed to the shape of the grains resulting from the various methods of …

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The Commercial Value Of High Iron And High Alkalie Diaspore, William Lucius Mccracken Jan 1931

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.

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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 Jan 1931

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.

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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 Jan 1931

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 …

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The Effect Of Small Amounts Of Chrome Ore On Dry Press Diaspore Refractories, Allen John Reid Jan 1931

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" …

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Pressure Transmission In Clays Affected By Time Of Pressure Application, Robert Edward Lee Jan 1931

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 …

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A Study Of Anode Corrosion And Its Influence On Cathode Purity In Electrolytic Zinc Production, Harold John Roesser Jan 1931

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.

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Flotation Of A Western Complex Ore, Guy Verdier Martin Jan 1931

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 …

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Comparison Of Results Obtained On Ores From The Tri-State Zinc-Lead District After Grinding To Different Sizes And Concentrating By Flotation, Hans Maucher Jan 1931

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.

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Producer Gas Practice In The Steel Industry, Horace Wilfred Hodges Jan 1930

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, …

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The Effect Of Occluded Air In Dry-Press Mixes, William Raymond Powell Jan 1930

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, …

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The Testing Of Steel For Wear By Abrasives, Thomas Evan Eagan Jan 1930

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.

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The Effect Of Various Methods Of Grinding On The Physical Properties Of Unfired Dry Press Brick, Edwin Theodore Harvey Jan 1930

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 …

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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 Jan 1930

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 …

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A Fire Clay Cement Study, Willard E. Davis Jan 1930

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.

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Disintegration Of Ozark Plastic Fire Clay In The Drier, Elmer Francis Cirkal Jan 1930

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.

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Mechanical Treatments Of A Missouri Fire Clay And Their Effect On Shrinkage, Porosity And Strength, Allen Richard Maune Jan 1930

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.

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The Determination Of The Alumina Content In Diaspore And High Alumina Clays, W. D. Keller Jan 1930

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.

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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 Jan 1930

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 …

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Laboratory Concentration Of The Missouri Iron Ores Of Iron Mountain And Pilot Knob, Strathmore Ridley Barnott Cooke Jan 1930

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 …

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Salts In Tri-State Mill Waters: Their Ill-Effect On The Flotation Of Zinc And Their Removal, Warren Lincoln Howes Jan 1930

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 …

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A Power Study Of A Laboratory Ball Mill, Frederick Clearman Jan 1930

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 …

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The Coarse Crushing Plant Of The Desloge Consolidated Lead Company, Horace Reynolds Stahl, Robert Gibson O'Meara Jan 1929

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.

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Florida Kaolin As The Chief Clay Ingredient For A Sanitary Ware Casting Body, Hugo Logan Harrod Jan 1929

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.

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A Study Of Chrome And Diaspore Mixes, Harlow Guy Jones Jan 1929

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.

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Beneficiation Of Manganese Ores, Michael V. Healey Jan 1929

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.

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Cone Deformation Eutectics Using Sodium Chloride, Dolomite, And Alpite Rock, William K. Schweickhardt Jan 1928

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 …

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