Engineering Commons^™

A Study Of The Losses Of Gold During Cupellation In The Presence Of Tellurium, George Albert Easley, Carl Winthrop Keniston

Bachelors Theses

"It is generally accepted that the presence, in the lead button, of a small amount of tellurium causes, during cupellation, a loss of gold. Little, however, is known as to the loss, when tellurium is present, due to variation in the temperature of cupellation...Our work was carried on with the intention of determining the loss of gold, due to temperature in the presence of known amount of tellurium and to compare this loss with that caused by the temperature alone. Has temperature the same, a greater, or a less effect on the loss of gold during cupellation when tellurium is …

The Microstructure Of Drill Steel, Arthur L. Pollard

Bachelors Theses

"The object of this thesis was to determine the microstructure of the various grades of steel used in rock drilling and to obtain if possible some general relation between the structure, composition, and hardening temperature. About 35 of the best known grades of tool steel having a carbon content of about 1 per cent or containing an equivalent hardening agent"--page 2.

Minerals And Their Environment Of Formation, Deforrest Don

Bachelors Theses

"The history of mineralogy began with the development of mining and the use of certain minerals as useful products, such as lime, pigments and precious stones. In order to know how to distinguish these minerals when found and where they were likely to found, it was necessary to study the nature, properties and the modes of occurrence. In order to determine all these properties, it was necessary to classify and compare them with the purpose of ascertaining how they resemble each other, and how they differ"--page 1.

Investigation Of Hindered Settling Ratio Of Galena, Sphalerite And Pyrite As Compared To Quartz In Air, Ralph Wilheim Watson, William Danels Clarke

Bachelors Theses

"The object of this thesis is to determine the hindered settling ratios in air, of Galena, of Pyrite, and of Sphalerite as compared to Quartz"--Problem, page 1.

Steinmesch Hindered Settling Classifier, Jesse Herman Steinmesch

Professional Degree Theses

"The construction of the single classifier is well shown in the attached blueprint.

On the print it will be noted that the classifier is divided into two general parts, an upper hopper-shaped chamber GFED, and a lower portion consisting of the flat tube C, encased by the chamber A. Between upper and lower portions is the gasket L which serves to make a close joint between them, and also by forcing C downward, to make tight joints between A and C at both top and bottom. L is made of 1 ½” board. At D is a plate of #12 …

General Method Of Procedure In The Working Out Of The Uncompahgre Valley Project, Colorado, Leo J. Foster

Masters Theses

"On the 17th of June 1902, Congress passed an act which may have appeared of little moment at that time, but which is not attracting the attention of the people of the United States. It is known on the Statute Books as the Reclamation Act and its purpose is to provide a Reclamation Fund, the said fund being used only to examine and construct Irrigation Works in certain Western States and Territories. This Act provides that the proceeds of the sale of public lands in thirteen States and three Territories, known as the Public Land States, less a deduction of …

Copper Smelting In A Rotary Furnace With Pulverized Charcoal, Elmer Cooper Heck

Professional Degree Theses

"This process is in use at the Verde Grande Copper Company's plant, located thirty-two miles north west of Hermosillo in the state of Sonora, Republic of Mexico, and is yet experimental"--page 1.

Square Set System Of Timbering As Employed By The Shannon Copper Co., Ray Eugene Hoffman

Professional Degree Theses

"The properties of The Shannon Copper Co., consisting of mine and smelter, are located in the Southeastern part of Arizona in what is known as the Clifton-Morenci District. The smelter is located at Clifton and the mine at Metcalf, eight miles distant on an iron capped mountain known as Serro Preito.

From a geological standpoint the ore deposits of the Clifton-Morenci District are a freak. There are no fissure veins of any consequence in the district; all the large deposits are found in bodies, the ore usually occurring in a soft porphyry.

Underlying the iron capping on the Shannon property …

Report Of La Mina Boquillas Del Carmen, Of Coahuila, Mexico, James Asa Gregory

Professional Degree Theses

"The several denouncements embracing the group known as the Boquillas Del Carmen Mines are located in the western foothills of the Boquillas del Carmen range, and about eight miles in an air line, east of the small town of Boquillas, just across the Rio Grande River and in the state of Coahuila, Mexico"--page 1.

Tests Of Efficiency Of The Rolla Power Plant, Ward Barr Mix, Edwin Bryant Thornhill, George Fred Kellogg, Clyde Rex Wood

Bachelors Theses

"The object of the test was to determine the efficiency of the separate units and of the plant as a whole under actual normal working conditions"--Object, page 1.

Effect Of Arsenic On Assay For Gold And Silver, Rosco Conkling Ham, Frederick Arnold Moore

Bachelors Theses

"In presenting the within thesis, it is not claimed by the authors that the experiments have been, by any means, exhaustive of the subject. Neither is any claim made to original research work other than a series of simple experiments with a view to determining, if possible, some of the more important effects of Arsenic upon a fire assay for gold and silver as met with in the ordinary assay laboratory. To make a work complete and exhaustive on such a subject will require much more time and more complete apparatus than was available in the experiments covered by this …

A Report On The Shattuck And Arizona Mine At Bisbee, Arizona, John Joseph Sanford

Bachelors Theses

"The Shattuck and Arizona Mine is about one-half mile southwest of the town of Bisbee and five-sixteenths of a mile west of the Holbrook shaft of the Copper Queen property. The mine is on the east slope of Escanbrosa Ridge and a quarter of a mile up Uncle Sam Gulch. It adjoins the Uncle Sam Mine on the north and the Cuprite, a Copper Queen property, on the east"--Location, page 1.

Test Made On The Missouri School Of Mines Power Plant, Leland R. Walker, George Hewitt Boyer, Alfred Leo Nye

Bachelors Theses

"The primary object of this thesis was to obtain the total efficiency of the Missouri School of Mines Power Plant"--page 1.

Pot Roasting Of Lead Ores, Ralph Robert Benedict, Edward Phillip Barrett, Frank William Harper

Bachelors Theses

"In this thesis for a starting point, we attempted a roast of straight galena with no diluent. As anticipated the results were nil. We next attempted the roast with a mixture of galena and silica, and obtained fair results. Our next experiment was to use limestone with the galena. Because of the large percentage of limestone present the results were not satisfactory. Next pyrites and limestone were used with the galena, and excellent results were obtained. We made another run, using pyrites and limestone, but increasing the per-centage of galena by 25%. This run was also very successful. From these …

Mining And Milling Of A Low Grade Copper Ore, Richard Edward Armstrong, Horace Asahel Johnson

Bachelors Theses

No abstract provided.

Effects Of Copper On The Cupellation Of Silver, Charles A. Baker, Miles Sedivy

Bachelors Theses

"The object of this work is to find the effect of copper in the cupellation of silver. Our method of attack was: 1st. To find the effect of varying the amount of copper with constant lead and constant temperature. 2nd. Effect in cupellation of varying the temperature and the lead in the presence of a constant amount of copper. 3rd. To determine the rate at which the copper is removed during cupellation"--page 1.

The Development Of A Lead, Zinc Prospect, Felix Anthony Lyneman

Bachelors Theses

"The writer's object in this thesis is to devise a method of mining the ores from a well-known Chitwood Prospect, Jasper Co., Mo., so that the same will pay dividends"--Object, page 1.

Process Of Treating Slimes In Ore Reduction, Gustavus A. Duncan

Professional Degree Theses

No abstract provided.

Design, Specifications And Cost Estimate Of Two Hundred Ton Stamp Mill And Cyanide Plant For Treatment Of Gold Ore, John Payne Sebree, William Peter Hatch

Bachelors Theses

"The object of this thesis is the designing and a mill, writing specifications for same, and furnishing complete cost of entire plant to treat 200 tons of gold ore"--page ii.

Efficiency Of Mill Practice In The Joplin District, Ira Lee Wright

Bachelors Theses

"Milling in the Joplin District is, compared with the practice in other zinc fields, seemingly very crude. To one unacquainted with the peculiar conditions of this district, the amount of ore which goes into the tailing pile seems unnecessarily high. There are several things which account for the low saving made"--page 1.

Meridian-Projecting Instruments And Methods, Albert Babbitt Bartlett

Bachelors Theses

"The writer's attention was called to the necessity of knowing the accuracy attainable in surveying which must depend upon the Meridian, and therefore be subject to the accuracy of it, in seeking information by which to decide what would be the most desirable transit to use in the West, particularly for United States Deputy Mineral Surveying. Descriptions of the manipulation, adjustments, and the cost, etc., of the various appliances are plentiful in the text-books on surveying and in the various catalogues; but there was no very definite information in regard to the actual probable and average accuracy, especially in the …

Lime Roasting Of A Galena Concentrate With Subsequent Smelting In The Blast Furnace, Aubrey P. Fellows, Tsik Chan Tseung, James Carter Long, Edwin Richard Wash

Bachelors Theses

"Having on hand a quantity of Galena concentrates, which we wished to treat in the blastfurnace accompanied by a usual previous roast, but having no reverberatory furnace, we decided to experiment upon the ore with lime roasting as invented by Savelsbury, to see if it was practicable"--page 1.

Treatment Of A Low Grade Gold Ore, Paul Richardson Cook, Sakuhei Sunada, Arnold George Baker

Bachelors Theses

No abstract provided.

An Investigation Of The Treatment Of A Silver Ore By Lixiviation With Sodium And Cuprous Thiosulphate Solutions, Elston Everett Jones

Bachelors Theses

"The object of this investigation is to find whether the ore can be treated with profit by lixiviation and to find the best conditions for maximum extraction"--page 1.

Treatment Of A Mexican Copper Ore, Harold Thomas Mapes, Robert Hardy Bedford

Bachelors Theses

"The ore to be treated consists of a sulphide carrying some metallic copper"--page 1.

Copper Matting Blast Furnace Run, John Vivian Stevens, Frank Bowman Powell, John Dozier Shanks

Bachelors Theses

"The theory of the copper blast furnace run having been given us in the class room, we wishing to familiarize ourselves with the practical processes and the difficulties involved, selected it as the basis of an investigation of which the following is a correct report. The original ore was a high grade copper sulphide from the Ducktown, Tenn. district to which was added some heavy pyritic ore from various quarters. The latter was added to furnish the iron oxide necessary as a flux in the blast furnace and sulphur in sufficient amount to make the ore self roasting when charged …

The Commercial Preparation Of Baryta, Ray Fleming Rucker, Damon Duffield Dunkin

Bachelors Theses

"The object of this investigation was to ascertain in a general way the methods employed at the present time in mining, milling and leaching baryta, and the commercial uses to which the product is put, with the idea in view of improving these methods and encouraging a more extended use of the product if possible"--page 1.

A Special Investigation In Concrete Steel And Application To Square Set System, Horace Alonzo Hand

Bachelors Theses

"This investigation has been prompted, first, by a desire to become more familiar with concrete-steel in its general application to engineering construction, second, by the inevitable necessity of a substitute in the near future for lumber in mining construction. In first case, a thorough review has been made of principles and practice in the construction of concrete-steel structures in general, including bridges, water towers, reservoirs, viaducts, etc., as found in current engineering journals, which is the most up-to-date source of information available. Special attention has been given to best practice in reinforcing concrete to resist forces of bending, shearing, torsion …

Furnace Calculations, John Mcmillen Brooks

Bachelors Theses

"A furnace that will smelt a given amount of material per twenty-four hours, to dimension parts, and finally draw the complete plans. Copper Matting Furnace"--Problem, page 1.

Report On Polaris Mine, Stanley Ralston Moore

Bachelors Theses

No abstract provided.