Engineering Commons^™

Crushing Machines, Samuel J. Gormly

Bachelors Theses

"Crushing machines may be divided into: crushers, rolls, and pulverizers. Ore as it comes from the mine is usually in larger lumps which require breaking up preparatory to the subsequent treatment it may receive. For this purpose mechanical means must be employed, and the following pages are intended as a rational treatment of the most approved methods, in ore crushing at the present day"--page 1.

On The Fire Assay Of Gold, Silver, And Lead, Claude D. Grove

Bachelors Theses

No abstract provided.

Russell's Lixiviation Process For Silver Ores, Frank L. Tyrrell

Professional Degree Theses

"It has long been known that there are many ores worked in which a large per cent of silver and gold are continually lost, either in tailings or slimes. As far back as 1848 Dr. Percy suggested the extraction of silver from argentiferous ores, by its conversion into the chloride. The chloride was treated with sodium hyposulphite"--Russell's Process, page 1.

The Cyanide Process For Gold, John C. Reid

Bachelors Theses

"Since the discovery of Cyanogen in the latter part of the 18th century records of many experiments are in existence, showing, that at various periods, exhaustive researches have been made, in which the point at issue was to investigate that property which now constitutes the foundation of what is known to Metallurgical Science of today as The Cyanide Process, vis. The solvent power of alkali cyanides on gold & silver"--page 2.

Production Of Spelter From Calamine, Merritt W. Yeater

Professional Degree Theses

Calamine is one of the most important ores of Zinc and together with the silicates with which it is almost always associated is extensively employed for the production of Zinc. Smithsonite formerly called calamine when pure, consists of Zinc oxide and carbonic acid containing 52 percent of Zinc. It has a specific gravity of 4.2, hardness 4.5m and color is from pale yellow to green.

The silicate when anhydrous called Willemite, contains 58 percent of Zinc, specific gravity 4, hardness 5.5, and color from white to gray or pale yellow.

When hydrous it is called Calamine, specific gravity 3.16 to …

The Ore Knob Copper Process, Oscar Lachmund

Professional Degree Theses

"The works of the Ore Knob Copper Company are situated in the County of Ashe in the north-western part of the state of North Carolina, about ten miles from the Virginia line at an elevation of 4000 feet above the sea.

The works are 45 miles from the railroad, which makes the transportation very difficult. These unfavorable conditions make it necessary for the owners of the mine to smelt their ores and to send to market nothing except the metal, which alone will bear the cost of transportation. The mine was opened previous to 1860, but has only been worked …

Mine Opening And Timbering, George W. Cole

Masters Theses

No abstract provided.

Extraction Of Silver By The Wet Way, Justo Garcia Martinez

Bachelors Theses

"The great variety of ores in which silver occurs, usually makes it necessary to employ complicated processes for its extraction.

The extraction of the precious metal admits of two general processes viz. The Dry, and Wet Way and as I have chosen the latter for the subject of my thesis, we will be dispensed with the Dry Way, and will try and give all the processes and forms in which silver is extracted by the Wet Way"--page 1.

Leaching Processes For Silver Extraction, Phil Van Frank

Professional Degree Theses

"The leaching process for the extraction of silver are comparatively modern, being introduced in 1849. They belong to a period in which the metallurgist has brought to his aid knowledge derived from chemical research. Under favorable circumstances leaching procedures process many advantages over amalgamation or smelting. For successful use the ores treated for silver must not contain large per cents of lead, zinc, antimony or arsenic. The objections to these bodies will be named later on. When silver is extracted by smelting or amalgamation, a costly plant is necessary, which requires constant repair and in time wear out and be …

Smelting Processes For Silver Extraction, John R. D. Owen

Professional Degree Theses

"The base metals used for the extraction of silver from its ores by smelting are lead and copper, and the different methods employed may be accordingly classified under the general headings of "extraction by means of lead" and "extraction by means of copper"--page 3.

The Metallurgic Treatment Of An Ore For Gold, Silver, Lead, And Copper, William M. Claypool

Professional Degree Theses

No abstract provided.

The Production Of Spelter As Practiced At The Glendale Zinc Works, Arthur Neustaedter

Professional Degree Theses

"Description of the Zinc Works. The "Glendale Zinc Works" are situated in the southern part of the city of St. Louis, on the line of the St. Louis Iron Mountain and Southern R. R. and among the iron manufacturing districts they are the only zinc works now in operation and produce a large quantity of spelter"--page 2.

Metallurgic Industries Of South Missouri, Philip Gallaher

Professional Degree Theses

"The metallurgic industries of South Missouri consist chiefly of iron, lead and zinc industries. These are widely distributed over the southern counties and in many localities the works are extensive, proving in many cases to be great sources of wealth. In the production of Iron the profit is small. Yet this industry, owing to a growing demand, is steadily increasing"--page 2.

The Systems Of Amalgamation, Floyd Davis

Bachelors Theses

"Mineralogists have shown that gold, with few exceptions, occurs in the metallic state, disseminated in ores or scattered throughout alluvial deposits of old river basins. Silver is quite similar in its occurrence, but it is almost universally found in combination with other elements. The means in which these metals occur forms a large factor in determining the most economical and efficient systems of metallurgical treatment"--page 1.

Hydraulic Mining, Arthur Neustaedter

Professional Degree Theses

Hydraulic-mining has undoubtedly its origin in America and principally in the west, when gold was found in 1848 it was imbedded in strata of clay, land and gravel, the question arose how should we get it out of the clay and etc.? and here is the origin of hydraulic-mining. First there was used the simple “pan”, then something better was found, the “cradle,” and then it came to the “tom”, “sluice” and lastly to “hydraulic mining”, all of these come under the head of hydraulic-mining, but the last which bears that name is resorted to only in situations where the …

The Metallurgic Treatment Of The Iron Ores Of Southwest Missouri, Beauregard Ross

Professional Degree Theses

I can say nothing new upon the subject of the Metallurgy of Iron. The science has approached such a degree of perfection that very little, if anything, has been left to be said. The attention of the modem metallurgist should be devoted to the mechanical contrivances which will enable him to manipulate the work of his men to the best advantage rather than to an improvement in the process”—Introduction, page 6.

The Metallurgic Treatment Of Lead Ores As Carried On In South-West Missouri, Frank W. Gibb

Professional Degree Theses

No abstract provided.

Spelter From Blende, Wilton R. Brown

Professional Degree Theses

"Zinc Blende consists essentially of sulphur and zinc, and has the formula ZnS. When pure it contains 66.72% of zinc and 33.28% of sulphur. The ore usually contains varying amounts of iron, copper, and antimony as sulphides and also silica, lime, and magnesia...

In order to treat zinc blende for spelter or metallic zinc, the ore must be treated in a roasting furnace. The roasting is for the purposes of driving off the sulphur and converting the zinc to oxide. Owing to the density of the ore and the difficulty of expelling the Sulphur, the blende must be first crushed …

Illustration Of The Concentration And Flintshire Furnace Treatment Of Lead Ores At The Desloge Mines, Missouri, A. H. Ohmann-Dumesnil

Professional Degree Theses

"The Desloge Mines, the subject of the present thesis, are situated in Township 37 North and Range 4 East, St. Francois Co. Mo. and are directly north of the St. Joe mines. They are 10 miles distant, in a north-easterly direction, from Cadet, a station on the St. Louis, Iron Mountain and Southern Rail-Road 57 miles from St. Louis. hough Cadet is insignificant in point of population, still as a shipping point, it ranks high among those in South East Missouri; since it is the depôt and entrepôt for the Desloge, St. Joe and Old Mines....

The subject of lead …

Fire Clays And Refractory Materials, James A. Pack

Professional Degree Theses

“Nor did the primitive metallurgists who were the first to apply this iron rock to practical use imagine, as they toiled over their unsightly furnaces made of common sun dried clay in which there could not be generated sufficient heat to reduce the iron to a liquid form, and to the top of which the smelter might reach with his hand, that in the future this metal would need to be smelted in furnaces that would reach to the tops of their very temples, and at a temperature that would defy the resistance of the firmest granite.

But yet these …

Iron Ores And Associates At Buckland's Bank, Sec. 20. T. 37. R 8, W, Phelps Co. Missouri, Oscar Garvens

Professional Degree Theses

"The Iron deposit locally Known as "Bucklands Bank" is situated in the south half of Sec. 20. T. 37 R. 8 west Phelps County Missouri, about four (4) and a half (1/2) miles west of Rolla and on the line of the Atlantic and Pacific R.R.

It was opened by Sen. T. C. Buckland of St. Louis in 18--, but subsequently was leased to Mr. Wm. James of St. James, who shipped the ore for treatment at the Ozark Furnace five and a half (5 1/2) miles further westward on the railroad.

The deposit is classified by Schmidt* as a …

Copper Ores And Deposits Of Shannon County, Missouri, John D. Greason

Professional Degree Theses

"The deposits of copper at present opened in shannon County belong to the Consolidated Land Company of Missouri. They are situated in the N.W. 1/4, N.E. 1/4, Sec. 36, Town. 29, Range 4, about one and a half miles south-westerly from Emminence, the county seat of Shannon County. The deposits were first opened and operated upon by Jos. Slater, who took out and shipped about 1500 tons of the ores to Swansea Wales for treatment. The ores consisted chiefly of Copper Glance, with small amounts of Azurite, Malachite and Cuprite"--page 2.

Illustrations Of The Treatment Of Nickeliferous Ores At Mine La Motte, Madison County, Missouri, William C. Minger

Professional Degree Theses

"The Mine la Motte property consists of a tract of about 24000 acres situated in the counties of Madison and St. Francois, principally in the former, however. It has been worked since the year 1720, and besides its historical interest is certainly one of the most important mines in the state, as regards both the capitalist and scientist. These facts warrant a detailed description of the mines, and the methods of working which are in vogue there, these being necessary to any one who would realize their magnitude and importance. The property is situated about 100 miles southeast of St. …