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Articles 3241 - 3270 of 3279
Full-Text Articles in Mining Engineering
Geological Conditions And Genesis Of The Ore Deposits Of The Rush Creek District, Marion County, Arkansas, William Melvin Weigel
Geological Conditions And Genesis Of The Ore Deposits Of The Rush Creek District, Marion County, Arkansas, William Melvin Weigel
Bachelors Theses
No abstract provided.
The Determination Of The Fusing Point Of A Few Igneous And Metamorphic Rocks, Fred H. Perkins
The Determination Of The Fusing Point Of A Few Igneous And Metamorphic Rocks, Fred H. Perkins
Bachelors Theses
"There are two methods of arriving at the refractoriness of a rock. One is the physical, the other is the chemical. The physical methods attempt to determine it directly by subjecting it to heat, and the temperature obtained is registered by use of numerous methods, a type of each kind I will describe in this paper. The chemical methods attempt to arrive at the result by calculations based upon a chemical analysis, though one or more physical determinations have to be made as a basis for these calculations. As the former method is direct, my operations are based upon this …
Thesis For Degree Of Bachelor Of Science In Mining Engineering [A Fire Clay Of Missouri], Howard Joshua Taylor
Thesis For Degree Of Bachelor Of Science In Mining Engineering [A Fire Clay Of Missouri], Howard Joshua Taylor
Bachelors Theses
"The clay examined is a fire clay of Missouri, varying in color from white, in pure specimens, to yellow or brown when stained with iron. It is opaque with a luster, varying from dull to pearly, an argillaceous odor and unctous feel"--page 1.
The Mining & Construction Of A Smelter For The Production Of Zinc-White From Western Lead-Zinc Ores, Hector George Sylvester Anderson, V. B. Hinsch
The Mining & Construction Of A Smelter For The Production Of Zinc-White From Western Lead-Zinc Ores, Hector George Sylvester Anderson, V. B. Hinsch
Bachelors Theses
"On account of the high price of the old Dutch process of making white lead and the undesirability of sublimed white-lead as the bulk of the pigment, the use of zinc-white as an adulterant of the lead-white made by the old Dutch process is new extensively used by all paint manufacturers. The advantages of its use in conjunction with white-lead in the manufacture of white paints is the fact that it does not combine with sulphur as does white-lead itself. The specifications of the U. S. Light-house Dept. require 75% of zinc-oxide and 25% of white lead as a mixture. …
Design Of A Mining Plant, George C. Clark
Design Of A Mining Plant, George C. Clark
Bachelors Theses
"It is to be hoped that in the perusal of this short discussion, the idea will not be lost sight of that the work has been done by a novice - probably a needless caution as the fact is patent at every step. Again, while the work is supposed to be laid along practical lines, no attempt has been made to abbreviate and show merely what is absolutely necessary. As the subject is treated as a thesis and not as a proposition to contractors, the attempt has been made to show the method of arriving at conclusions, and when necessary …
Gold Chlorination, Edwin Thompson Perkins
Gold Chlorination, Edwin Thompson Perkins
Bachelors Theses
"In a process of gold chlorination recently introduced and apparently used with success in Southern Australia, potassium permanganate, common salt and sulphuric acid were used as the generators of the chlorine. A series of experiments was made to determine the efficisacy of these reagents and for developing chlorine as compared with other methods in use"--page 1.
Electrolysis Of Water In A Copper Sulphate Solution, Hermann Otto Schulze
Electrolysis Of Water In A Copper Sulphate Solution, Hermann Otto Schulze
Bachelors Theses
No abstract provided.
Some Quantitative Experiments On The Electro-Deposition Of Copper, Jerrold Roscoe Underwood
Some Quantitative Experiments On The Electro-Deposition Of Copper, Jerrold Roscoe Underwood
Bachelors Theses
"The object of these experiments was to determine in a quantitative way the effect or effects, if any, of these various metals on the purity of the copper precipitated electrolytically. The material worked with was from a copper anode from ( ) carrying a silver, a trace of gold, arsenic and antimony as well as other metalic sic impurities"--Object, page 1.
Pennsylvania Coal Fields, Arthur D. Terrell
Pennsylvania Coal Fields, Arthur D. Terrell
Bachelors Theses
"The use of mineral coal dates back before the Christian Era.
The mining of coal, however, is much more recent.
About the 18th century coal mining began to be scientifically executed.
The area of Anthracite coal fields in Penn. is not quite 500 square miles included in outcrop lines of its lowest beds"--page 1.
The Electrolysis Of The Water Of A Copper Sulphate Solution, Ralph Barker
The Electrolysis Of The Water Of A Copper Sulphate Solution, Ralph Barker
Bachelors Theses
"The idea prevails generally, that when an electric current is passed through a copper sulphate solution, the water will be electrolysed sic when the difference of potential between the electrodes reaches about one and one-half volts. The object of the experiments detailed below was to determine whether or not the density of the solution has any effect on the electrolysis of the water, and if any such existed, to find out if there was any relation between them"--page 1.
Some Experiences With A Pan Amalgamation Mill, Guanacevi, Mexico, Arthur J. Stewart
Some Experiences With A Pan Amalgamation Mill, Guanacevi, Mexico, Arthur J. Stewart
Bachelors Theses
"The work of the chemist and assayer at a pan amalgamation mill is cheifly sic routine work. The work of one day differs, generally, very little from the work of an other day. But occasionally some contingency arises which taxes his ability to the utmost"--page 2.
Contact Plane Concentration, John A. Rogers, George Walter Dean
Contact Plane Concentration, John A. Rogers, George Walter Dean
Bachelors Theses
"Contact plane concentration depends upon the principle that a thin sheet or film of water flowing over a plane surface may be so adjusted that its quantity and velocity are just sufficient to bear away the lighter particles of gangue, leaving behind only the heavier particles of the mineral to be concentrated, adhering by friction to the plane, the concentrates being removed by any convenient method. Thus we see it is best adapted to the concentration of minerals having widely differing specific gravities but may be used for the concentration of all ores and minerals with any specific gravity whatsoever"--page …
Hydraulic Separation, Albert Edwin Eardley, John Simpson Cameron
Hydraulic Separation, Albert Edwin Eardley, John Simpson Cameron
Bachelors Theses
"Before beginning a discussion of the various experiments performed with the hydraulic separators in the Laboratory of the S. of M., a brief statement as to the principle upon which their working depends, and their functions in the dressing of ores should be given. The crude ore when first delivered from the mine is usually not of sufficient richness to be economically handled by the smelters; it therefore becomes necessary to eliminate as far as possible that part of the ore which is of no material value, and among the various forms of apparatus now in use for this purpose …
Mineral Land Survey, Claude D. Grove
Mineral Land Survey, Claude D. Grove
Professional Degree Theses
"Field notes of the survey of the mining claim of the Sylvanite Gold Mining company known as the Ready Cash, Gold Bug, Shamrock, Midland and Cyclone Lodes, Cripple Creek Mining District, El Paso and Fremont County, Colorado"--page ii.
Limitations Of Sizing In Concentration, Walter G. Martin
Limitations Of Sizing In Concentration, Walter G. Martin
Bachelors Theses
"All ore reaching the mine mouth consists of two portions, the portion containing the mineral which is valuable, and the gangue or worthless portion. The ultimate object then of concentration is the complete separation of these two portions and in the cases when more than one mineral exists with the gangue, to separate the different mineral products from each other"--page 4.
Coke, Temple Dyer
Coke, Temple Dyer
Bachelors Theses
"Coke in general is applied only to the product got from bituminous coal by driving off volatile matter and cementing the coal into a localities; a small deposit being found near Richmond Va."--page 1.
Crushing Machines, Samuel J. Gormly
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
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
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
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.
The Ore Knob Copper Process, Oscar Lachmund
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 …
Production Of Spelter From Calamine, Merritt W. Yeater
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 …
Mine Opening And Timbering, George W. Cole
Extraction Of Silver By The Wet Way, Justo Garcia Martinez
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.
Smelting Processes For Silver Extraction, John R. D. Owen
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.
Leaching Processes For Silver Extraction, Phil Van Frank
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 …
The Metallurgic Treatment Of An Ore For Gold, Silver, Lead, And Copper, William M. Claypool
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
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
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
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.