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Full-Text Articles in Engineering Science and Materials
Investigation Of Multiple Torch Paw-Based Additive Manufacturing, Nathan Huft
Investigation Of Multiple Torch Paw-Based Additive Manufacturing, Nathan Huft
Graduate Theses & Non-Theses
PAW Print 3D (PP3D), a wire and arc additive manufacturing (AM) system was developed. PP3D comprises three plasma arc welding torches arranged radially around a central wire feed. Using three torches was hypothesized to eliminate sensitivity to travel direction. Two deposition modes were developed – continuous, which deposited continuous beads, and dabber, which deposited discreet “dabs” of material. Dabber was hypothesized to provide favorable solidification conditions that would refine the as-deposited grain structure. Three sets of process parameters for each deposition mode were developed. Ineffective workpiece melting was observed and investigated during process development. Using COMSOL Multiphysics software and experimental …
Mechanism For Disodium Carboxymethyl Trithiocarbonate (Orfom® D8) Depression In Chalcopyrite-Molybdenite Flotation Systems, Simon Timbillah
Mechanism For Disodium Carboxymethyl Trithiocarbonate (Orfom® D8) Depression In Chalcopyrite-Molybdenite Flotation Systems, Simon Timbillah
Graduate Theses & Non-Theses
The chalcopyrite-molybdenite (Cu-Mo) flotation industry is increasingly turning to organic depressants as suitable replacements for inorganic reagents such as NaHS due to environmental and safety concerns as well as high consumption rates of the inorganic reagents. An opportunity arises for improving, designing and synthesizing new alternative reagents. Disodium Carboxymethyl Trithiocarbonate (Orfom® D8) depressant is an organic depressant with a carboxylate group on one end and a trithiocarbonate group at the other end. Fundamental results are shown regarding the interaction of the Orfom® D8 depressant in the bulk flotation of a Cu-Mo concentrate from an operating North American mine. …