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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 191 to 200 of 8840 (0.034 seconds)| 191 |
Alkaline Pressure Oxidation of Pyrite in the Presence of Silica – Characterization of the Passivating FilmDani, Anirudha 22 November 2013 (has links)
Alkaline pressure oxidation, particularly in the presence of trona as additive, can be used to oxidize high carbonate refractory gold ores as it prevents the formation of CO2 in the autoclave. However, the presence of silica in the ore can lead to the encapsulation of pyrite due to the formation of a passive layer. This phenomenon occurs due to the high solubility of silica in alkaline solutions and its subsequent re-precipitation on the reacting pyrite surface. The present study investigated the chemical composition and thickness of the passive layer on a rotating pyrite surface in an aqueous slurry containing silica sand, sodium carbonate and calcium carbonate at 230°C and under 7 bar of oxygen overpressure. Results obtained from XPS and SEM show that a concentration of 2.5 g/L sodium carbonate gave the maximum thickness of passivation on pyrite and that the passive layer consisted primarily of silicates and aluminosilicates.
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| 192 |
A corresponding states approach for the calculation of viscosity over a wide range of temperature and pressureThurner, Paul Alan 05 1900 (has links)
No description available.
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| 193 |
The response of a finite length tube of viscous compressible fluid to a step function in pressureMiller, John Thomas 08 1900 (has links)
No description available.
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| 194 |
A theoretical and experimental analysis of lengthwise pressure gradient for flow of air in small bore tubing considering the effect of elevated temperatureLaster, Marion Lynn 08 1900 (has links)
No description available.
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| 195 |
An analytical method for the prediction of pressure lag inherent in ballistic missile pressure sensing systems when subjected to impulse-type pressure functionsPirie, David Alexander 05 1900 (has links)
No description available.
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| 196 |
Numerical modeling of the expansion phase of vapor explosionsHwang, Moonkyu 08 1900 (has links)
No description available.
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| 197 |
Vapor explosions in thermite-generated meltsGriffith, Eric F. 12 1900 (has links)
No description available.
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| 198 |
On the behavior of exterior acoustic modes of structuresCurrey, Mary Noelle 12 1900 (has links)
No description available.
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| 199 |
The design of a pressure control system for a compressible flow test apparatusHinson, Roscoe McClendon 12 1900 (has links)
No description available.
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| 200 |
A comparison of the methods of computing the wind stresses in buildingsShahan, Maxwell Lee 05 1900 (has links)
No description available.
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