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Fundamental Study of Flotation Behaviors and Oxidation Mechanisms of Polymorphic Pyrrhotite and Pentlandite
DownloadFall 2021
This thesis is mainly concerned with understanding the flotation behaviors of the polymorphic pyrrhotite (Fe1-xS, 0 < x ≤ 0.125) and pentlandite ((Ni,Fe)9S8) to find better measures for their flotation separation. The flotation separation of pentlandite from pyrrhotite is a complicated issue due...
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Fall 2021
Pentlandite is very important to the mining industry since it is the main source of metallic nickel. However, its separation from hexagonal pyrrhotite is a challenge for processing engineers due to the similar floatabilities of these sulfide minerals. An inefficient separation of these minerals...
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The Effect of High Intensity Conditioning on Surface Oxidation with Processed Sudbury Nickel Ore
DownloadFall 2019
In the Sudbury Basin, froth flotation is commonly used to recover Pentlandite (Pn), and Chalcopyrite (Cp), while rejecting Pyrrhotite (Po), and other gangue minerals typically found in the region. However, as the sulfide minerals flow through the plant the surfaces continually oxidize, allowing...
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Understanding Surface Forces and Interaction Mechanisms in Mineral Flotation by Atomic Force Microscopy
DownloadFall 2019
Bubble-particle interactions are ubiquitous and crucial to mineral fotation. The bubble-particle attachment process is mainly governed by three surface forces: van der Waals (vdW), electrical double-layer (EDL), and hydrophobic (HB) forces. Atomic Force Microscopy (AFM) has become the most...