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Articles 33391 - 33420 of 33636
Full-Text Articles in Entire DC Network
The Effects Of Co₂, So₂, And Temperatures On Blende Roasting, Monroe Farrar
The Effects Of Co₂, So₂, And Temperatures On Blende Roasting, Monroe Farrar
Bachelors Theses
"This work deals with the effect which different temperatures and different percentages of CO₂ and SO₂ have on the speed of roasting of zinc sulphide. I selected sphalerite from the Joplin district"--Page 1.
Chemical Analyses Of Special Tool Steels, Elmer List
Chemical Analyses Of Special Tool Steels, Elmer List
Bachelors Theses
No abstract provided.
Nichrome As A Rheostat Resistance, George C. Vogt
Nichrome As A Rheostat Resistance, George C. Vogt
Bachelors Theses
"Nichrome wire is a high resistance alloy, and is not appreciably effected in its resistance by changes of temperature to which it may be subjected in practice. This was shown by the low temperature coefficient obtained. Nichrome does not deteriorate by heating, as shown by torsion-tests after current has been passed through wire. German-Silver however, becomes brittle. Nichrome in a moist atmosphere corrodes rapidly, but in a relatively dry atmosphere, and heated red hot, no signs of oxidation or corrosion could be seen. By all results obtained as to strength, resistance, etc., Nichrome is superior to German-Silver as a resistance …
Specifications And Bill Of Material For Roaster In Ore Dressing Laboratory Of Missouri School Of Mines, John Dee Harlan
Specifications And Bill Of Material For Roaster In Ore Dressing Laboratory Of Missouri School Of Mines, John Dee Harlan
Bachelors Theses
"POSITION OF ROASTER. In the North West corner of the East wing of the Metallurgy Building. The space allowed is nineteen feet (19ft) long by fifteen feet (15ft) wide. The floor is of concrete. The walls are of brick. OBJECT OF ROASTER. to give either an Oxidizing or a Reducing Roast; to partially roast the ore or to give it a dead roast"--SPECIFICATIONS, page 1.
A Study Of The Electrical Resistance Of Coke, Gas-Carbon, And Kryptol Under Varying Conditions, Benton Franklin Murphy, Reuben Conrad Thompson
A Study Of The Electrical Resistance Of Coke, Gas-Carbon, And Kryptol Under Varying Conditions, Benton Franklin Murphy, Reuben Conrad Thompson
Bachelors Theses
"This thesis was undertaken to make a study of the resistance of coke, gas-carbon, and kryptol when used as resistors in the electric resistance furnace, which daily is becoming of increasing industrial importance. It would appear at first sight that the calculation and design of an electric resistance furnace would be an extremely simple problem, since the whole effect is the change of electrical energy into heat according to Joule's Law; but this is by no means the case, as the resistance of the resistor may change enormously during the run of the furnace. The great difficulty met with is …
Investigation Of Hindered-Settling Ratio Of Galena And Quartz In Air, John Sloan Stewart, Ralph Daniel Killian
Investigation Of Hindered-Settling Ratio Of Galena And Quartz In Air, John Sloan Stewart, Ralph Daniel Killian
Bachelors Theses
"The object of this Thesis is to determine the hindred sic -settling ratio in air of Galena and Quartz, and to verify if possible the result of the work done in 1909 by W. D. Clark and R. W. Watson"--Problem, page 1.
Transportation Of Chert In Launders, Louis Joseph Porri, John Lyle Pickering
Transportation Of Chert In Launders, Louis Joseph Porri, John Lyle Pickering
Bachelors Theses
"Water is often carried from place to place in artificial channels, such as troughs, aqueducts, ditches and canals. A launder is, specifically speaking, a trough, and it is with this that this article will treat. It is the purpose of this investigation to discover, if possible, first, the maximum carrying power of water when transporting chert; second, to find the relation existing between the velocities of different sized chert"--Introduction, page 1.
Some Geology On The Weingarten Quadrangle, Missouri, John Whittlesey Bodman
Some Geology On The Weingarten Quadrangle, Missouri, John Whittlesey Bodman
Bachelors Theses
"The work in this report covers about 90 square miles situated in the east and middle portion of Ste. Genevieve County, Missouri, between townships 35-37 north and ranges 7-9 east. It is termed the Weingarten Quadrangle by the State Geological Survey...The body of the thesis is detailed areal mapping. All formations and structural features are put on a topographic map with a scale of 1/62,500, contour interval 20 ft., datum mean sea level"--page 1.
A Study Of Some Assay Problems, Walter Dobbins, Charles Weaver Traughber
A Study Of Some Assay Problems, Walter Dobbins, Charles Weaver Traughber
Bachelors Theses
"The object of this thesis is to work out some assay problems. Each problem is taken up independently, and may be considered as having no connection whatever with the others"--Introduction, page ii.
The Losses Of Gold During Cupellation Using Various Makes Of Cupels, Benjamin Harrison Dosenbach
The Losses Of Gold During Cupellation Using Various Makes Of Cupels, Benjamin Harrison Dosenbach
Bachelors Theses
"There are on the market various cupels. Many of the assay-supply firms sell a "manufactured" cupel, presumably made of bone-ash. The great majority of all cupels used, are made of bone-ash in the assay office itself. The object of this work is to compare the losses of gold when the various patented, the various manufactured and the ordinary hand made cupels are used"--page 1.
A Comparison Of Various Methods Of Assaying Cyanide Solutions For Gold, Theodore Saunders Dunn
A Comparison Of Various Methods Of Assaying Cyanide Solutions For Gold, Theodore Saunders Dunn
Bachelors Theses
"Although there has been a great deal written on the different methods of assaying cyanide solutions and new methods are being devised constantly there has been very little said as to the relative merits of the methods in use. An attempt has therefore been made in this paper to compare several of the methods now used"--page 1.
A Study Of The Efficiency Of Discharge Of Classifier Spigots, Harmon Edwin Minor, James Bunten
A Study Of The Efficiency Of Discharge Of Classifier Spigots, Harmon Edwin Minor, James Bunten
Bachelors Theses
"A knowledge of the amounts of water and sand that will be discharged by classifier spigots under various conditions is of considerable importance in the design of classifiers. Suppose it is desired to discharge fifty tons of sand with an average diameter of 2 m.m. through a spigot orifice, the sand being mixed with 100 tons of water and the entire amount of the mixture being discharged in ten hours from the spigot, which is submerged to a depth of two feet under the water. How large a spigot is required? Problems such as this are by no means uncommon. …
Notes On The Precipitation Of Gold From Cyanide Solution, Charles Adrian Burdick, Harry Wade Connelly
Notes On The Precipitation Of Gold From Cyanide Solution, Charles Adrian Burdick, Harry Wade Connelly
Bachelors Theses
"This work was to determine the Potassium Cyanide and the Zinc consumed in the precipitation of Gold from cyanide solutions by zinc dust"--page 1.
Friction In Small Air Pipes, Albert Park, Howard Kelsey Peterson
Friction In Small Air Pipes, Albert Park, Howard Kelsey Peterson
Bachelors Theses
"In the course in Compressed Air at the Missouri School of Mines our attention was called to the fact that no reliable data could be found relating to friction losses in pipes under three inches in diameter carrying compressed air. Therefore the undersigned decided to undertake as a thesis the securing of the needed data and herein are recorded the results of our work"--page 1.
The Concentration Of A Pyrolusite Ore, Frank O. Blake, Van Hoose Smith
The Concentration Of A Pyrolusite Ore, Frank O. Blake, Van Hoose Smith
Bachelors Theses
"This is the history of an attempt to produce from a pyrolusite ore, a material sufficiently rich in manganese to be of value in the various industries such as the making of speigeleisen and ferro-manganese, the glass manufacturing, and the chemical industries. The greater part of the manganese used in the United States comes from Brazil, India and Russia. Our American ores are, in general, low grade and requires various preliminary concentration to fit them for use. Although we possess in this country a great deal of manganese ore, which could be put into suitable condition for the market, there …
The Determination Of Friction-Coefficients Of Water In Small Iron Pipes, O. W. Holmes, Ernest Wander
The Determination Of Friction-Coefficients Of Water In Small Iron Pipes, O. W. Holmes, Ernest Wander
Bachelors Theses
"This thesis was undertaken to determine accurately the coefficients of friction of water, flowing at varying velocities in small iron pipes and elbows. It was the intention to obtain the condition of pipes and elbows similar to that met with in general practice"--Introduction, page 1.
The Preparation Of Zinc Blende For Reduction, Frederick Edward Riede, Earl Frederick Boland
The Preparation Of Zinc Blende For Reduction, Frederick Edward Riede, Earl Frederick Boland
Bachelors Theses
"The object of this thesis was, in the beginning, to investigate the losses which occur throughout the process of extracting zinc from its ore. Owing to the length of time required in roasting and to the short period of time to do the work, we were compelled to limit ourselves to the roasting of zinc blende or the preparation of zinc blende for reduction"--page 3.
A Study Of Some Problems In Cyaniding, Sidney S. Schmidt, Russell B. Caples
A Study Of Some Problems In Cyaniding, Sidney S. Schmidt, Russell B. Caples
Bachelors Theses
"The object of the following tests was rather to determine quantitatively the consumption of Potassium Cyanide and of Sodium Cyanide when agitated by compressed air, and when agitated by compressed air in the presence of iron pyrite and in the presence of iron filings, than to explain chemically the causes for this consumption"--Part One, page 1. "The following tests were made to study the rate of percolation of water, under certain conditions, through pure quartz. the information sought is of importance in the cyanide process. By "rate of percolation" we mean the distance traveled in a unit time, by water …
Modern Cyanide Practice, Harvey Edson Smith
Modern Cyanide Practice, Harvey Edson Smith
Bachelors Theses
"It is noticable sic that about all of the recent improvements in cyanide practise sic have been along mechanical rather than chemical lines. the use of oxidizers such as air, ozone, sodium peroxide, etc., the use of the salts of lead, and even the addition of a coating of lead to the zinc shavings in the extractor boxes were all recommended when the process was first advocated but sometimes for different reasons. In the early days of the process the addition of hypochlorites, alkaline persulphates, and the use of mercuric cyanide was also investigated but has not proven satisfactory owing …
An Investigation Of Certain Methods For The Determination Of Gold In Cyanide Solutions, James Joseph Bowles
An Investigation Of Certain Methods For The Determination Of Gold In Cyanide Solutions, James Joseph Bowles
Bachelors Theses
"Some questions having been raised as to the reliability of the various methods for the quantitative determination of gold in cyanide solution, this work was undertaken with the view of determining the relative accuracy and convenience of these methods"--page 2.
The Design Of A Mill To Treat A Certain Gold-Silver Ore By Cyanidation, Emilio Diaz, Robert William Mackey
The Design Of A Mill To Treat A Certain Gold-Silver Ore By Cyanidation, Emilio Diaz, Robert William Mackey
Bachelors Theses
"The problem under consideration is the design of a hundred-ton mill for treating silver ores by cyanidation... The Sulphur is partly combined as Sulphide and partly as the Iron Sulphates, FeSO₄ and Fe₂(SO₄)₃. To determine the best method of procedure, preliminary tests were run on lots of 100 pounds each, this being crushed in a sampling grinder and classified into sand a slime"--Introduction, page 1.
Abstract Of The History Of The Metallurgy Of Iron And The Development Of Iron Blast Furnaces, Norman L. Ohnsorg
Abstract Of The History Of The Metallurgy Of Iron And The Development Of Iron Blast Furnaces, Norman L. Ohnsorg
Bachelors Theses
No abstract provided.
Ore Dressing Laboratory For The Missouri School Of Mines And Metallurgy, Rolla, Missouri: Design, Description, Drawings For Erection, Bills Of Material, And Specifications, Boyd Dudley Jr.
Masters Theses
"The work of preparing suitable drawings and specifications for the construction of the new Ore Dressing Laboratory of the Missouri School of Mines and Metallurgy was begun about August 15, 1909. At that time general plans, as shown in drawings No. 1 and No. 2, were drawn up and submitted for approvaleaf With certain minor alterations, to be mentioned under the section on specifications, these plans will be followed in the installation of machinery. Other detail drawings were made by the class in Ore Dressing Problems under the direction of the writer during the school term ending March 12, 1910. …
The Rollamo 1910, The University Of Missouri School Of Mines And Metallurgy
The Rollamo 1910, The University Of Missouri School Of Mines And Metallurgy
Yearbooks
No abstract provided.
Design Of 300 Ton Cyanide Tailings Plant And Operation Of Same, Lamar Horacio Hunt
Design Of 300 Ton Cyanide Tailings Plant And Operation Of Same, Lamar Horacio Hunt
Masters Theses
"The plant in question was designed by the writer, to treat the immense tailings dumps of the Sacramento Gold Mining company at Mercur, Utah, consisting of one-half million tons of old cyanide tailings. The ore is porous and friable, causing much slime, which is impermeable to cyanide solution, by the old leaching system. Slime has always been troublesome, and the above plant was designed to overcome this difficulty"--page [1].
A Method Of Obtaining Lead Concentrates From The Slimes Of The St. Joseph Lead Mill, Lewis Alfred Delano
A Method Of Obtaining Lead Concentrates From The Slimes Of The St. Joseph Lead Mill, Lewis Alfred Delano
Professional Degree Theses
"In the concentrating of lead ores, the water used in the mills carries the tailings from the jigs and tables to chatt tanks. Here the chatts and sands settle while the greater part of the water overflows and enters a sluice or slimes branch to the settling ponds. This overflow water carries with it a great deal of float lead. It is impossible to catch this lead in the mill on moving machinery without using too much power and mill space to effect a profitable saving. Ninety percent of this float will pass through a 140 mesh sieve. there will …
Economic Investigation Of The Lignites Of The Dickinson, N.D. Area, Glenn Beckley Morgan
Economic Investigation Of The Lignites Of The Dickinson, N.D. Area, Glenn Beckley Morgan
Professional Degree Theses
No abstract provided.
The Relation Of The Composition Of A Mineral To Its Properties, Edwin Phelps Murray
The Relation Of The Composition Of A Mineral To Its Properties, Edwin Phelps Murray
Professional Degree Theses
"The attempt has been made to bring together and to classify the properties of minerals and to show that there is some simple qualitative relation between their composition and physical properties, or in other words, to show that minerals containing different percentages of a certain element will all have similar properties dependent upon the proportion of that element. Further investigation of this subject would be in determining the modifying influence of crystal form"--page 1.
The Rollamo 1909, The University Of Missouri School Of Mines And Metallurgy
The Rollamo 1909, The University Of Missouri School Of Mines And Metallurgy
Yearbooks
No abstract provided.
Technical Analysis Of Corn Products, Roy Hayward Dewaters
Technical Analysis Of Corn Products, Roy Hayward Dewaters
Bachelors Theses
"This thesis treats of the technical analysis of the products of corn as used in practical work in the manufacture of starch and glucose. These notes are the results of special investigation carried on along this line"--page 1.