Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 6 of 6
Full-Text Articles in Engineering
Optimization Of Rare Earth Leaching From Ores And Concentrates, Grant Wallace
Optimization Of Rare Earth Leaching From Ores And Concentrates, Grant Wallace
Graduate Theses & Non-Theses
The use of applied chemistry in the production and optimization of leach solutions from Rare Earth Element (REE) ores and concentrates was investigated. Ore and concentrate samples were characterized using scanning electron microscopy/mineral liberation analysis (SEM/MLA), X-ray Diffraction (XRD), and Inductively-coupled Plasma Atomic Emission Spectroscopy (ICP-AES). Multiple leach tests were performed to analyze the effects of temperature, residence time, and reagent concentration on the leaching of REEs. Analysis of leach solutions was carried out using ICP-AES. Modeling and statistical analysis of extraction behavior was carried out using DesignExpert 9. Modeling data for multiple REEs indicate that extraction is strongly influenced …
Autoclave Leaching Of Montana Chromite, Leonard S. Greely
Autoclave Leaching Of Montana Chromite, Leonard S. Greely
Bachelors Theses and Reports, 1928 - 1970
The purpose of this investigation was to determine the feasibility of caustic autoclaving of Montana chromite in order to recover the chromium in a relatively pure solution of sodium chromate.
The Application Of Amalgam Metallurgy To Copper, Barry J. Hansen
The Application Of Amalgam Metallurgy To Copper, Barry J. Hansen
Bachelors Theses and Reports, 1928 - 1970
The object of this investigation is the application of "Amalgam Metallurgy" to the extraction of copper from its ores. "Amalgam Metallurgy" as defined by Hohn is the use of liquid mercury in the extraction of metals. The ore under study was from the Kelly Mine in Butte, Montana and contains about 1.0% copper of which about 0.1% is acid soluble.
The Effect Of Strontium Sulfate Addition On The Lead Content Of Electrolytic Zinc, Arthur E. Morris
The Effect Of Strontium Sulfate Addition On The Lead Content Of Electrolytic Zinc, Arthur E. Morris
Bachelors Theses and Reports, 1928 - 1970
The production of electrolytic zinc involves the passage of an electric current through an aqueous solution of zinc sulfate and sulfuric acid. While all plants use procedures fundamentally the same, there are principal differences in the acidity of electrolyte, the zinc content of the electrolyte and the current density used.
Leaching, Purification And Precipitation Of Glen Scheelite Concentrates, Harold L. Coolidge
Leaching, Purification And Precipitation Of Glen Scheelite Concentrates, Harold L. Coolidge
Bachelors Theses and Reports, 1928 - 1970
The leaching, purification and precipitation of the Glen scheelite concentrates were performed to acquaint the student with the equipment and processes involved. The concentrates were obtained through the courtesy of the Minerals Engineering Company. Leaching was carried out in the high-pressure autoclave; whereas the purification and precipitation were carried out in laboratory beakers.
Electro-Galvanizing From A Purified Ammonium Sulphate Leach Of Anaconda Zinc Calcine, Phillip J. Mischkot Jr.
Electro-Galvanizing From A Purified Ammonium Sulphate Leach Of Anaconda Zinc Calcine, Phillip J. Mischkot Jr.
Bachelors Theses and Reports, 1928 - 1970
Ever since the introduction of metal products into our civilization, especially those of iron and steel, man has been confronted with the problems of corrosion prevention. As the agents which are conducive to corrosion cannot be completely eliminated, it has been necessary for man to develop processes and materials that will retard the degeneration of the metals that are so important to our industrialized world.