Showing papers in "Canadian Metallurgical Quarterly in 2017"

TL;DR: In this article, a computational fluid dynamic (CFD) model was developed to incorporate pulp and froth zones into one model by tracking the formation and destruction of the froth phase.

TL;DR: In this paper, the effect of repetitive intercritical annealing on the mechanical properties and work-hardening response of a typical C-Mn dual-phase (DP) steel was studied by consideration of different pre-intercritical microstructures and martensite volume fractions.

TL;DR: In this article, an attempt is made to join nickel-based alloy 825 by employing CO2 laser beam welding, and a successful full penetration weld joint of a 5'mm thick plate is achieved with a very low heat input of 120'J-mm−1.

TL;DR: In the early 1980s, these industrial operations were closed and pyrrhotite containing up to 1%Ni became a wastage as mentioned in this paper, and the Ni industry would then have a more sustainable process, which would liberate a valuable smelting capacity for higher value Pn and recover Ni, Fe, S and energy.

TL;DR: In this article, a one-step gravity casting technique was used to synthesize in situ composites of pure Al, Mg and Si using one-stage gravity casting techniques.

TL;DR: An interdisciplinary approach is presented, using MP to incorporate basic notions of mass balancing into an optimisation framework, and may assist plant managers to make tactical decisions based on incoming feed data.

TL;DR: In this paper, the results showed that the vanadium extraction percentage can reach up to 97% and the iron extraction percentage less than 10% in a thirteen-stage countercurrent simulation test and the separation coefficient between vanadium and iron can reach to 1098.

TL;DR: In this article, a hydrometallurgical method is discussed to selectively extract base metals such as copper, cobalt, nickel and iron from the copper granulated slag (0.53% Cu) at atmospheric pressure.

TL;DR: In this paper, a diffusion joining of commercially pure titanium was successfully prepared via transient liquid phase bonding in vacuum environment using AMS 4772 silver-based filler alloy at 900-1000°C for various holding time under the vacuum of 6'×'10−7'7'Torr.

TL;DR: In this paper, a comparative study of micro-structural transformations and tribological properties of the friction stir processed AZ91-D magnesium alloy in normal friction stir processing (NFSP) and submerged friction Stir Processing (SFSP) conditions was carried out.

TL;DR: In this paper, the authors explored the dehydration kinetics of colemanite ore using thermogravimetric analysis techniques (thermograimetric (TG)/derivative thermograbimetry (DTG)) in the range of 0-1000°C at heating rates of 2, 5, 10 and 20°C min−1 in an inert (N2) atmosphere.

TL;DR: In this paper, a new process for magnesium production was proposed in which both the calcination stage and the reduction stage are performed in one retort, and thermal analysis and vacuum reduction experiments were carried out for evaluating the feasibility of the process.

TL;DR: In this paper, the authors developed a novel solution for the transient heat transfer problem during the startup phase of a direct-chill casting (DCC) process by using the element-free Galerkin method (EFGM).

TL;DR: In this paper, the carbon and sulphur contents of the sample carbonised at 800°C for 1440 min were 94.68 and 0.05%, respectively, with increasing temperature, carbon ratio of the carbonised samples increased and their sulphur ratio decreased.

TL;DR: In this article, the authors showed that the mass balance of pyrrhotite and pentlandite in the presence of Fe(III) and oxygen, in contrast to the preferential dissolution in the absence of Fe (III), showed that Ni mass balance increased with increasing temperature.

TL;DR: In this paper, a 1/5 scaled physical slice model of a bottom blown oxygen copper smelting furnace was established to investigate the flow field characteristics in the pool and in the freeboard above the pool.

TL;DR: In this article, phase relationships and liquidus in the Cu-O-ZnO-SiO2 system in air were experimentally determined using the equilibration/quenching/EPMA technique at temperatures 1473, 1573 and 1673

TL;DR: In this paper, the authors analyzed the start of the martensitic transformation in 4140 steel from the point of view of six definitions, and discussed in detail the implications based on the better understanding of progression of the transformation.

TL;DR: In this paper, the melting temperature, viscous properties, slag structure and crystalline phases with different w(CaO)/w(Al2O3) were investigated.

TL;DR: In this paper, a constitutive equation, using the extrapolation of dynamic recovery (DRV) flow stress curve and Avrami kinetics equation for dynamic recrystallisation (DRX), has been developed.

TL;DR: In this article, a thermogravimetric investigation was performed to evaluate the kinetic and thermodynamic parameters and the influence of mechanical activation on oxidation of vanadium-bearing LD (Linz-Donawitz) converter slag.

TL;DR: In this article, the effect of plasma nitriding parameters on corrosion susceptibility of 17-4 PH stainless steel in 3.5 wt-% NaCl solution was investigated.

TL;DR: In this article, a cylindrical consolidates in dry nitrogen atmosphere at various temperatures ranging from the solidus-to-liquidus temperatures for 30 min at a heating rate of 10°C/min−1.

TL;DR: In this paper, the SPS-forge product exhibited tensile yield strength of 603 MPa coupled with a ductility of 9.1% and a hardness of 93 HRB.

TL;DR: In this paper, the acid leaching of reductively roasted zinc calcine was studied on sample particles with a fine-grained sediment structure, and it was concluded that selective leaching is favored at a high acidity above 90 g/L−1 and a low temperature.

TL;DR: In this article, Ni-Al2O3 multilayer nanocomposite coatings were pulse electroplated on mild steel at a constant frequency of 500 Hz and alternative duty cycles of 20 and 80, assisted with ultrasound agitation.

TL;DR: In this article, the properties of the composites processed using the combination of separate and combined milling laid in between the two conditions of combined and separate milling were compared, showing that the combined milled powders achieved excellent electrical properties combined with moderate hardness and flexural strength.

TL;DR: In this article, the authors used the same experimental setup to investigate the time that it takes for a bubble to form; for a known system power input, the energy to form a bubble can then be estimated from the time, which can be interpreted as an added energy component being derived from the solute.

TL;DR: In this article, the effect of the proportion of coal and wood charcoal on the mechanical strength and CO2 reactivity in briquettes of mixtures of coal with wood charcoal was investigated.