Engineering Commons^™

Concentration Of Ores By Flotation, John Gay Reilly, Frank Stillmann Elfred

Bachelors Theses

"Flotation is a new step in the separation of valuable minerals from gangue. This process has only been in commercial use for about six years. There has been several theories advances as to how the ore is concentrated, and the theory that is now usually accepted is that the oil covers or wets the sulphide mineral particle and does not the gangue; and this mineral particle, by means of induced aid is concentrated on the surface. The authors of this thesis have not attempted to explain the reason or reasons why minerals will float; but have accepted the theories advanced …

Chemical Control Work In The N. K. Fairbanks Factories, John Whittlesey Bodman

Professional Degree Theses

"We propose to discuss in this thesis the organization of the N. K. Fairbank Company, particularly with reference to the duties of the Chemical Division, Operating Department in this organization. From a broad viewpoint, we believe that the particular organization by with the N. K. Fairbank Company secures application of its chemical ability to manufacturing operations as well as to special problems, is characteristic of a widespread movement taking place for recognition of the chemical engineer in industry. This is particularly true in those industries where manufacturing operations are based primarily upon practical applications of chemical principles"--Abstract, page 1.

Descriptive Study Of The Petroleum Refinery At MinatitláN, GermáN GarcíA Lozano

Professional Degree Theses

"In order to reduce as much as possible the cost of transportation of the crude oil to the refinery, the city of Minatitlán of Minatitlán County in the State of Veracruz was chosen as the most proper place for establishing the refinery it being in the center of the only oil fields which at that time possessed the "Eagle Mexican Petroleum Co."--page 1.

The Goltra Process Of Concentrating Iron Ores As Developed At Waukon, Iowa, Ernest Wander

Professional Degree Theses

"The more or less impure iron bearing mineral occurs mixed with a very tenacious clay, in which are also found chert, cretaceous quartz pebbles, pockets of sand, masses of pebbles and sand cemented by hydrous iron oxide, (which in some cases partly replaces the silica) and several varieties of fossils, such as crinoids etc. The impurities mentioned are often an integral part of the ore particles, and are present in varying quantities thruout [sic] the deposit. But, besides the foreign matter which the eye can discern, the apparently pure mineral contains a varying percentage of silica and alumina, (as well …

Some Typical Bridges For Logging Railroad Construction, Frederick Hauenstein

Professional Degree Theses

"In some of the pine regions of the Ozark Mountains, a considerable portion of the country is rolling and rough, comprising a succession of hills and hollows. The most efficient method of logging such a tract is obtained by locating the logging road so as to secure a down grade haul for the logs, with consequent up grade return for the empty cars. This necessitates locating the main line of the railroad along the principal creek, and then laying spurs up the different tributary creeks as they are met. Such a procedure requires much crossing and re-crossing of creeks and …

The Rise Of Temperature In Concrete While Setting, Chester L. Hoffman

Undergraduate Theses and Senior Projects

No abstract provided.

Concentration Of A Joplin Slime By Flotation, Earl Joseph Weimer, Walter Harry Freudenberg

Bachelors Theses

"Concentration of the Joplin slimes by means of flotation is a subject receiving considerable attention at the present time, due to high price of zinc. These slimes are the accumulation of the finer particles of the ore during the milling process, and their zinc content is well worth considering. The practice in the past has been to sluice these slimes into the tailing pond, as no economical method of saving the zinc had been employed. The object of our experiment was to economically extract from these slimes by flotation, a product of sufficient zinc content to be of commercial value"--Introduction, …

Selective Concentration Of A Complex Ore By Flotation, Paul Frederick Pape, Ralph Dale

Bachelors Theses

"The problem of the Mining Engineer and Metallurgical Engineer who wishes to treat the slimes and fine sands of a complex ore is the recovery and separation of minerals so as to render a subsequent treatment of any mineral profitable. The minerals must be separated into groups which can be treated by different processes, because a combination of numerous minerals is extremely undesirable at the smelting plant. In a lead ore the presence of zinc often depletes its value to such an extent that it is unprofitable to treat it; likewise with other minerals and ores. Many systems of selective …

Practical Details Of Mine Surveying In Certain Mines Of Northern Mexico, Arturo C. Fernandez

Bachelors Theses

"The name of this thesis is suggestive of its character. The writer has endeavored to resent in a general way some of the most important details of mine surveying as he has found them in actual practice. For the sake of uniformity the engineering staff in which he worked prepared a set of instructions to be used by the engineers at the various mines. The methods and illustrations described in this paper have been adapted from these instructions and they afford a thorough foundation ready to receive the minor details best adapted to each particular mining district"--Foreword, page ii.

Operator's Instruction Manual: Case Va, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

A Thesis Submitted To The Faculty Of Marquette University, Lester James Myers

Bachelors’ Theses

Since the commerce of a country or city determines its position in the world of finance to such a great extent, it is natural to investigate the conditions which govern the country's or city's demand for its share of this commerce, and see if the natural location, and still does not receive its share of the commerce of the country, there is a decided chance for the investigation and removal of the obstacles which are the cause of this condition.

The Design Of A Twelve Story Reinforced Concrete Warehouse, A. M. Fromherz

Bachelors’ Theses

In submitting this design I do so with the one point in view, namely, to endeavor to determine when reinforced concrete becomes impractical for design purposes.

To produce a maximum condition of loading on the lower floors I have taken up the design of a warehouse which is to carry a live and impact load of 400# per sq. ft., plus the dead load on each of the twelve floors. This condition of loading is not practical for design, but it will produce our desired conditions.

From the design it can be readily seen that the columns become excessive in …

Proposed Bridge At Harbor Entrance In The City Of Milwaukee, Edwin J. Reichert

Bachelors’ Theses

The present city administration has placed itself on record as being in favor of an outer harbor. The outer harbor project shall consist of a series of docks and wharves, which eventually will extend all along the lake front South of Wisconsin St. and as far south as the Illinois Steel Company's plant.

With the realization of the outer harbor complete, arises a problem of conveying and transferring the immense quantities of freight which shall be unloaded at this outer harbor, which problem shall eventually be answered by building a network of railway tracks on a section of the six-hundred …

A Thesis Presented To The President And The Faculty Of Marquette University For The Degree Of Bachelor Of Science In Civil Engineering And Bachelor Of Science In Electrical Engineering, Anthony B. Czachurski, Benjamin D. Ratke, Joseph G. Casey, William H. Stephan

Bachelors’ Theses

In the work covered by this thesis it is desired to examine an undeveloped water power for the purpose of producing electrical energy as a commercial comodity. Experience has taught that it is best to ascertain first where the product will find its market, and to follow up a satisfactory showing at that end by determining the power capacity of the source, the feasibility of harnessing the same, and the cost of accomplishing this. This program would be adopted in any commercial enterprise to insure a reliable conclusion, and will be followed as closely as possible in the work covered …

The Decreasing Of City Garbage And Sewage Sludge, O. Henry Babcock

Bachelors’ Theses

At the present time there seems to be no general solution of the problem of garbage and sewage sludge disposal, and the chances are that there never will be. The problem in each city is different so that no set rule can be given that will apply to every city. Therefore it is an original problem with each city, governed by cer­tain conditions existing there.

Design Of A 12-Story, Structural Steel Building, Frank Lankauf

Bachelors’ Theses

The aim in writing this thesis has been to give as completely as possible, methods, data, and details for the design, of a twelve story, structural, steel building. The plan is one hundred and fifty-seven and a half by one hundred feet, with a fronting on two streets. As mentioned before, the building is twelve stories plus a basement or approximately one hundred and slxty feet above the sidewalk.

Transportation And Street Design And Its Application To The City Of Milwaukee, Eugene A. Howard

Bachelors’ Theses

No abstract provided.

Valuation Of Proposed Railroad From Grand Forks, N.D. To Bismarck, N.D. By Way Of Aneta And Carrington, Anthony Swendseid

Undergraduate Theses and Senior Projects

No abstract provided.

The Voice Of The Phi Sigma -- 1916 --, Phi Sigma

The Voice of the Phi Sigma

This item is part of the Phi Sigma collection at the College Archives & Special Collections department of Columbia College Chicago. Contact [email protected] for more information and to view the collection.

Design Of A Wooden Roof Truss Materials, William Herman Meyer

Bachelors’ Theses

No abstract provided.

Pneumatic Ore Concentration, Robert Winters Johnson, Walter William Weissbach

Bachelors Theses

"The concentration of lead and zinc ores by means of air is practically an unexplored field, although the subject is by no means a new one. Considerable research work has been done and several methods, processes and machines have been developed, but little or nothing has been accomplished towards making air separation a success. the lack of success has been due mainly to two reasons:- (1) That very little has been known about the internal conduct of air currents, and (2) that nearly all methods and machines so far worked out have presupposed the fact that the ore to be …

Mining Methods Of The Calumet And Arizona Mining Company, Warren District, Cochise County, Arizona, James Lawrence Head

Bachelors Theses

No abstract provided.

An Investigation Of Blended Cements, Byron Lee Ashdown

Bachelors Theses

"It is generally accepted to be a fact that the coarser particles of a cement are practically inert, and that it is only the finest particles that possess the cementing qualities. Exactly what percentage of the whole is active, or possesses the cementing properties, is not known. Since but few experiments pertaining to such have been performed there is consequently little data to be found"--Introduction, page 3.

Flotation Applied To Silicate Sludge, Yaro Klepel, Greene Erskine

Bachelors Theses

"Within the past few years great success has been made of the flotation of sulfids, and to a certain extent of carbonates.

Since sulfids are easily recovered by flotation it seems practicable that silicates could be made to float by first sulfidizing them, and then subjecting them to ordinary flotation treatment.

This problem involves the treatment of a silicate sludge obtained from the Joplin district, the sludge will easily pass through a 250 mesh screen. At the present time this sludge is being sent to the tailings pond.

The experimental work of this thesis was done along the line of …

The Flotation Of A West Joplin, Mo. Slime, John Stone Hoffman, James Joseph Dowd

Bachelors Theses

"Owing to the high price of zinc and the success attending flotation in other districts, intense interest was aroused in the flotation of slimes of the South-West Missouri District. These slimes are the accumulation of the finer particles of the ore during the milling process and their metallic content is generally higher than that of the original ore. They have been disposed of, in the past, by sluicing them to the tailings ponds because no economical method of saving the zinc had been discovered. The object of our experiments was to economically extract from these slimes, by flotation, a product …

An Investigation In Concrete, Don H. Morgan

Bachelors Theses

"It is the purpose of this investigation to determine the effect of blending a portland cement with a fine silica sand. A blended cement such as this has been used successfully and economically in several important works. The United States Reclamation Service and the Los Angeles Aqueduct commission have made use of such a blended cement in several important structures. This dilution, so to say, of the cement results is a decrease in cost without a loss of strength. In this investigation it has been assured that the cement retained on a #200 sieve is inert and may be replaced …

Construction And Maintenance Of Kansas City Boulevard Pavements, Ralph Robert Benedict

Professional Degree Theses

"In the first years of the history of the Park and Boulevard System of this city, road surfaces for boulevards received careful consideration for people were not satisfied with a good earth road well maintained. As the years have passed and the great changes have come in the methods of transportation, the evolution of pavements has had to keep pace with these changes"--page 1.

Comparison Of Operating Expenses And Capital Expenditures Of Two Different Types Of Boiler Rooms Covering Extensions Expected During The Next Twenty Years, George Hewitt Boyer

Professional Degree Theses

"This thesis applies to a central power station located in a rapidly growing manufacturing city with a present population of 40,000. The station is connected by high voltage transmission lines with six hydro and steam generating stations located in other cities. These transmission lines are mainly for emergency purposes so that this report considers that the station here studied will carry its full load. The boiler room is the only part of the station considered in this thesis as a previous study showed that there was ample space in the engine room for turbo-generator for years to come"--Introduction, page 1.

Cyaniding The Buckhorn Clay, Paul Richardson Cook

Professional Degree Theses

"The Buckhorn, Nevada, gold mine is peculiar in being a shallow kaolinized mass of material with basalt walls, having no direct connection with any of the usual gold bearing rocks, the average ore containing 16% water of hydratum. the cyaniding of this hydrant clayey material offered unusual difficulties compared with the usual gold quartz ore of Nevada. The ore body was thoroughly developed; then the mill was built according to the latest cyanide practice, with such changes as was thought the peculiar nature of this ore demanded. Upon starting the mill, the ore proved more difficulty to handle than had …

A Wet Process For The Extraction Of Mercury, Robert Glenn Sickly

Professional Degree Theses

"In this paper it will be the aim of the writer to deal as exclusively as possible with the Mercury Extraction Process as applied at the High-Grade Plant of the Buffalo Mines, Limited, Cobalt, Ontario, Canada. it will be necessary at times to refer to the treatment of the ore for the extraction of silver"--Introduction, page 2.