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Articles 1321 - 1350 of 1350
Full-Text Articles in Metallurgy
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.
Metallurgical Operations Of Pyritic Smelting As Carried On At Ducktown, Tennessee, Byron John Snyder
Metallurgical Operations Of Pyritic Smelting As Carried On At Ducktown, Tennessee, Byron John Snyder
Professional Degree Theses
"The Practice of Pyritic Smelting is a comparatively new method. It has made possible the extraction of metals from very low grade ores economically. In fact, the direct smelting of sulphide ores of any sort is a very modern metallurgy. This method is extensively used in the United States and British Columbia and will prove to be very valuable in the future development of other regions. Pyritic smelting may be considered as the oxidizing smelting of pyritic ores in a blast furnace with the view to producing matte which collects the values. A short discussion of copper smelting in general, …
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.
Laboratory Methods For Copper-Nickel Ores, Walter Irving Phillips
Laboratory Methods For Copper-Nickel Ores, Walter Irving Phillips
Professional Degree Theses
"The Sudbury nickel field, situated in the Province of Ontario, Canada, near the northern shore of Lake Huron, was practically discovered when building the Canadian Pacific Railway. The method of deposit is unusual in that it is not a vein filling but a true igneous deposition. The magma carried besides rock making constituents three principle sulphides, viz. - those of iron as pyrrhotite; of copper as chalcopyrite; and of nickel as pentlandite. These three sulphides, being heavier than the rock matter, and, favored by the slow rate of cooling of the magma, had sufficient time to settle into the lowest …
The Design And Installation Of An Apparatus For Dehydrating The Air Which Is Used In The Blast Furnaces Of The Hanyang Iron And Steel Works And Other Suggested Improvements, Hanyang, Hupei, China, Andrew Jackson Seltzer
The Design And Installation Of An Apparatus For Dehydrating The Air Which Is Used In The Blast Furnaces Of The Hanyang Iron And Steel Works And Other Suggested Improvements, Hanyang, Hupei, China, Andrew Jackson Seltzer
Professional Degree Theses
"The Hanyang Iron and Steel Works is located in the city of Hanyang, Hupei Province, inland on the mighty Yangste Kiang, a distance of one thousand seventy-five kilometers from Shanghai. The Works is at the junction of the Yangste and Han Rivers and covers several acres. The Works was established by the Viceroy Tchan and was to have been located at Shanghai, but His Excellency, the Viceroy, was transferred to Wuchang, so he decided to locate the Works in Hanyang - just on the opposite bank of the Yangste, from Wuchang ... The Works originally consisted of two blast furnaces …
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 Cyanidation Of High Grade Gold And Silver Concentrate, Reginald Henry Brinton Butler, John Warren Beard
The Cyanidation Of High Grade Gold And Silver Concentrate, Reginald Henry Brinton Butler, John Warren Beard
Bachelors Theses
"The cyanidation of high grade gold and silver concentrate is a subject that has lately been attracting the attention of metallurgists in different parts of the world, and offers an interesting field for investigation and research. The inducements are especially strong in districts at log distances from the smelter, and where high freight rates and excessive treatment charges obtain"--page 1.
The History And The Development Of The Cyanide Industry, Horace T. Mann
The History And The Development Of The Cyanide Industry, Horace T. Mann
Masters Theses
"The accompanying thesis is a compilation from articles published n the magazines and from books. Where no references are given, the statements are the impressions gained from reading several articles on the same subject. None of the work originated with myself"--page [ii].
Chemical And Physical Analysis Of Steel And Iron, John T. E. Ericson
Chemical And Physical Analysis Of Steel And Iron, John T. E. Ericson
Bachelors Theses
No abstract provided.
The Composition And Analysis Of Zinc-Lead Pigment, Evans Walker Buskett
The Composition And Analysis Of Zinc-Lead Pigment, Evans Walker Buskett
Professional Degree Theses
"Zinc is present as oxide and sulphate. There are also probably zinc and lead sulphites. It has been suggested that there may be carbonates in this pigment, but this is not probable as the high temperature of the furnace, the complete combustion of the fuel to CO2 and the large excess of SO2 gas in the bagroom would tend to prevent their formation. There is also a chemical combination between the zinc oxide and the lead oxide which is probably a zinc plumbate. Some light can be thrown on the subject by the following experiments:"--page 1.
Design Of A Lead Blast Furnace, Walter Irving Phillips, Andrew Jackson Seltzer
Design Of A Lead Blast Furnace, Walter Irving Phillips, Andrew Jackson Seltzer
Bachelors Theses
"In order to get the approximate size of the Furnace we made the following assumptions, being guided as far as possible by the practice of the Globe Smelting Works at Denver, Colorado whenever that could be ascertained"--page 1.
The Manufacture Of Coal Gas In St. Louis, Albert Dyke Wilson
The Manufacture Of Coal Gas In St. Louis, Albert Dyke Wilson
Professional Degree Theses
"Coal gas is made by heating Bituminous Coal in closed fire-clay retorts, for four or five hours, at a bright red heat. An exhauster pulls the gas from the retort as fast as it is generated in order to prevent, as much as possible, the breaking up of the hydrocarbons into carbon and hydrogen by the hot molls of the retort"--page 2.
Analytical Determination Of Copper Products, Charles Dosh Smith
Analytical Determination Of Copper Products, Charles Dosh Smith
Bachelors Theses
"It is a well known fact that the presence of impurities in copper products has been a source of annoyance to the Chemist. The object of this thesis was to make myself familiar with the actions of different impurities in copper products, and the methods for the determination of Arsenic in the same"--page 1.
Neutralization Of Free Acid (H₃P O₄) In Commercial Mono-Calcium Phosphate (Ca H₄ (Po₄), George William Harris, Harry Adam Grine
Neutralization Of Free Acid (H₃P O₄) In Commercial Mono-Calcium Phosphate (Ca H₄ (Po₄), George William Harris, Harry Adam Grine
Bachelors Theses
"The object of this thesis has been a systematic research based on the characteristic properties and reactions of mono-calcium phosphate, Ca H₄ (PO₄)₂, tending towards the development of a process for neutralizing the free phosphoric acid, H₃PO₄ formed during its manufacture"--page 1.
Influence Of Time And Temperature In The Roasting Of Sulphides, Roger Hanson Hatchett
Influence Of Time And Temperature In The Roasting Of Sulphides, Roger Hanson Hatchett
Bachelors Theses
"The original object of this work was to determine the relation between the quantities of oxide and sulphate formed in roasting a sulphide under known conditions of temperature, time and supply of air. But difficulties arose in constructing apparatus, which in the short time allotted could not be overcome. These are mentioned in description of apparatus, and were of such a nature that the relations between products and conditions are for the most part qualitative"--page 1.
Action Of Caustic Hydroxides Upon Aluminum, Herbert Fordyce. Rogers
Action Of Caustic Hydroxides Upon Aluminum, Herbert Fordyce. Rogers
Bachelors Theses
No abstract provided.
Assay Of Copper Matte For Gold And Silver, Walter E. Soest
Assay Of Copper Matte For Gold And Silver, Walter E. Soest
Bachelors Theses
"Ores containing copper, and especially copper matte, have always been very annoying in assaying for the precious metals. In assaying copper matte, and ores containing much copper, by the usual method of scorification, the losses of silver an gold are considerable, owing to the fact that in order to obtain lead buttons, which are soft and free from copper, repeated scorifications are necessary, and moreover it is impossible to obtain lead buttons which are entirely free from copper"--page 1.
White Lead, Evans Walker Buskett
Producer Gas, Edward P. Dwyer
Producer Gas, Edward P. Dwyer
Bachelors Theses
"Producer gas, so named owing to being produced in special forms of apparatus known as Producers. The fuel is decomposed into combustible gases, whereby most of the C is burnt to CO, whilst the H either remains free, or is converted into carburretted Hydrogen. Directly above the grate carbonic anhydride is formed but thus is rapidly converted into carbonic oxide; reaction as follows: CO₂ + C = 2CO.
Amongst these heavy carburetted hydrogen (C₂H₄) is that which principally increases the value of the gas as fuel and the drier the fuel used the more of the gas is produced. A …
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.
Aluminum, Edward Mackey Johnson
Aluminum, Edward Mackey Johnson
Bachelors Theses
"Ores: Cost of Production: Alloys. It is not the purpose of this thesis to discuss all the ores in which Al is found, but to describe rather fully the ores from which Al is obtained: such as Bauxite and cryolite. In regard to the alloys only the principal ones will be considered and described, especially the Al-bronze which is a very important alloy of copper and Al"--page 1.
Problem For Examination In Metallurgy, Herman H. Schwarz
Problem For Examination In Metallurgy, Herman H. Schwarz
Professional Degree Theses
"It is required to furnish plans, specifications and estimate for a Flintshire furnace, capable of smelting 2100 pounds of good galena, per shift of 8 hours. Give two drawings showing elevation and plan, drawn to a scale of 1/2 inch to the foot.
Fire brick, red brick and iron to be shown in colors. Estimates must cover both iron and brick work"--Problem to be Solved, page 2.
Ore Of Certain Composition, Walter W. Wishon
Ore Of Certain Composition, Walter W. Wishon
Professional Degree Theses
The metallurgic treatment of an ore having the following composition:
SiO2 20.10
PbS 9.90
ZnS 40.25
CuS 19.75
Sb2S3 4.95
Ag2S 3.10 or 787.48 oz per ton
Undeter. 1.95
100.00
To obtain the Silver by the Chlorination and Amalgamation process. The discussion of the subject consists of the following sections:
1st Preparation of the Ore
2nd Roasting
3rd Amalgamation
4th Retorting
5th Fusion in the Bars
The Metallurgic Treatment Of An Ore For Lead And Silver, Arthur C. Carson
The Metallurgic Treatment Of An Ore For Lead And Silver, Arthur C. Carson
Bachelors Theses
"The metallurgic treatment of an ore for Lead and Silver….
The discussion of which will consist of the following steps;
- Preparation of ore for smelting, which consists in roasting, and of the addition of fluxes such as will produce an easy flowing slag as the ... silicate
- The Production of Crude Lead, which will contain the Silver
- Extraction of Silver from the Crude Lead, which includes the retorting of the zinc-silver alloy and the cupellation of the rich lead
- The Refining of the desilverized lead"--page 1.
The Production Of Spelter From Zinc Blende, Lee R. Grabill
The Production Of Spelter From Zinc Blende, Lee R. Grabill
Bachelors Theses
"The problem which has been assigned to me for discussion as examination in metallurgy, is the treatment of a zinc blende from Sevier County, Arkansas; using the common Missouri or Illinois coal for fuel and the Spadra coal of Johnson County, Arkansas, as a reducing agent in the distillation process; and as clay for the manufacture of retorts, etc. that from the works at Cheltenham, Missouri, furnished by Parker, Russell & Company. Analysis of the materials used are to be given with details of processes and drawings & descriptions of machinery used; also approximate cost of furnaces, and approximate cost …
Metallurgy Of Gold, Wilton R. Brown
Metallurgy Of Gold, Wilton R. Brown
Bachelors Theses
"Metallurgy of Gold: Problem
Required, description of processes and machinery used in Extraction of Gold (and Silver) from earthy or siliceous ores as found in California
Ores represented by following:--SiO₂ 91.44; S(Zn,Pb)-Cu₂S 1.38; Al₂O₃, FeO &c 6.39; Au .0017, Ag₂S .12, variable in 1st and 2nd class ores
1⁰--The methods &c. employed in treating 1⁰ class ore (i.e. such as exceed in value $150 per ton)
2⁰--The methods &c. in treating 2⁰ class ore, such as contain less than $150 per ton.
Give in detail the chemistry of each process described; also illustrated by drawings of machinery for …
Treatment Of Gold And Silver Ores As Found In The Comstock Lode, Lee R. Grabill
Treatment Of Gold And Silver Ores As Found In The Comstock Lode, Lee R. Grabill
Professional Degree Theses
"Statement of Problem: Metallurgy of Gold, etc.
Required, description of process and machinery used in the extraction of Gold and Silver from earthy and siliceous ores as found in California, the ores being represented by the following- SiO2, 91.44; (Zn,Pb)+Cu2S, 1.38; Al2O3, Fe2O3, etc. 6.39; Au, .0017, Ag2S .12, Variable in 1st, 2nd, and 3rd class ores.
1° - The methods, etc. employed in treating 1st class ores, -such as exceed in value $150 per ton.
2° - Methods, etc. in treating 2nd class ores, such …
Silver Amalgamation, James A. Pack
Silver Amalgamation, James A. Pack
Professional Degree Theses
"The process of amalgamation is one of the oldest known methods of extracting silver from its ores. The process arose from the finding of rich silver ores in districts where little or no fuel existed.
This method of silver extraction has been known and used for over three hundred years; but the method of pan amalgamation which came into use much later and has been so fully developed under American management is the one which we will here consider.
The process of pan amalgamation is peculiarly adapted to certain mining districts of the western territory of the United States"--page 2.
Project For The Treatment Of An Iron Ore, James A. Pack
Project For The Treatment Of An Iron Ore, James A. Pack
Professional Degree Theses
"So great is the degree of perfection that marks the various processes of iron production that it seems almost useless to essay to further study a subject which has received the best thoughts and lifetime labors of the greatest metallurgists of all ages. Yet as we believe that there are still isolated cases whose various conditions have not received that consideration necessary to the most economical production of the pug; and believing that a most perfect knowledge of these conditions is essential to the final perfection of the metallurgy; and knowing further that a wide extended interchange of experience and …