Showing papers in "Canadian Metallurgical Quarterly in 2002"

TL;DR: In this paper, the authors developed a reliable and controlled experimental technique by which the transfer of heat from a high temperature droplet to a significantly cooler gas can be assessed and used to understand and improve gas atomization systems.

TL;DR: In this article, the authors studied the kinetics of the silicothermic reduction process of dolomite ore at a temperature range from 1150-1300 °C and found that the maximum reduction extent of about 92% was achieved when using charges in the form of briquettes containing 2.5 wt.% CaF2, CaO/MgO molar ratio of 1.6 and using silicon as reductant with its weight ratio/mgO equals 1.45.

TL;DR: In this article, a single fluid atomization technique (Impulse Atomization) was used to determine the effect of solidification time on the development of a solidification microstructure for a nominal Al-4.5%Cu alloy, AA6061 and AA6111 aluminum alloys.

TL;DR: In this article, the precipitation behavior of a low carbon microalloyed steel (0.08C, Nb, Ti, V and Mo) was studied by means of scanning and transmission electron microscopy using samples of industrially processed plate.

TL;DR: Calcium chloride is a very interesting electrolyte in that it is available, virtually free, in high purity form as a waste product from the chemical industry as discussed by the authors and it has a very large solubility for oxi...

TL;DR: In this article, the results of MnO reduction from manganese ore and ferromanganese slag obtained at NTNU (Trondheim) and UNSW (Sydney) were analyzed.

TL;DR: In this article, microwave radiation pre-treatment and surface activation were used to modify the surface properties of a massive ilmenite sample from Norway to improve the flotability of the mine.

TL;DR: In this paper, it has been shown that gold can be dissolved under conditions typical of those encountered during the pressure oxidation of refractory gold ores provided that the solutions contain chloride ions and that a high ratio of iron(III)/iron(II) is maintained.

TL;DR: In this paper, the effects of slag chemistry on the liquidus temperatures, sub-liquidus phase equilibria and thermodynamic properties are described by the F*A*C*T computer package with the new thermodynamic database of the ZnO-PbO-Feo-FeO-Io3-CaO-SiO2 system.

TL;DR: In this article, the authors describe the experimental details, data acquisition and data handling techniques for steel plates during water jet impingement cooling by one circulator in an industrial scale pilot runout table facility.

TL;DR: In this article, a Whitehead-based configuration with a multicircuit intercell bar is proposed to force the current balance in LIX-SX-EW (Leaching-Solvent Extraction- Electrowinning).

TL;DR: A comparative study of the copper corrosion rate and corrosion products originated by acetic and formic acid vapours at 40, 80% and 100% relative humidity (RH) using gravimetric, scanning electron microscopy, Xray powder diffraction and X-ray photoelectron spectroscopy techniques is made in this article.

TL;DR: In this paper, the modulated (spinodal) structures in Cu-32Ni-3Cr and Cu-46Ni-17Cr alloys were investigated by means of transmission electron microscopy (TEM) and X-ray diffraction (XRD).

TL;DR: The use of poly(diallyldimethylammonium chloride) as an additive in bath formulation enabled coagulation of ceramic particles near the cathodic substrates to form adherent green deposits with enhanced resistance to cracking.

TL;DR: In this article, the ligand ethylenediamine (EDA) was investigated as a potential candidate for an amine leach/electrowin process to recover base metals from toxic hydroxide sludges.

TL;DR: In this article, the fly ash taken from the Tuncbilek lignite fired power plant is characterized and separated from its byproducts, and a flowsheet is developed on the basis of differences in gravities and magnetic susceptibilities of the byproducts.

TL;DR: In this paper, a magnetic field is applied to the ball mill in order to control the energy exchange between the tumbling balls themselves and the powder particles in a traditional ball milling process.

TL;DR: In this paper, the IHCP (Inverse Heat Conduction Problem) method was used to measure interfacial heat transfer resistances during the solidification of aluminum-magnesium alloy strips.

TL;DR: In this paper, the surface tension, viscosity and self-diffusivity of liquid metals are again related to their melting point temperatures, and these regularities in the thermodynamic and kinetic properties of substances are shown to be a manifestation of the interatomic or intermolecular forces in solid, liquid and vapour phases.

TL;DR: In this paper, the effects of power input, electrode immersion, slag temperature and coke and solid revert additions on the rate of magnetite reduction and copper recovery were investigated.

TL;DR: In this article, the effect of Gelatin (G) on cathode quality during copper electrorefining has been investigated using scaled industrial cells and laboratory cells, where current densities ranged between 200 and 400 A m-2, and Gelatin concentration from 50 to 300 grams per ton of copper produced (g t-1).

TL;DR: In this paper, small amounts of aluminum (1 to 3 wt% Al) were alloyed with copper to study oxidation resistance at high temperatures, and it was found that the 3% Al-Cu samples oxidized at a rate 100 times lower than that of pure copper.

TL;DR: In this paper, the effects of cooling water temperature and impingement velocity on the heat transfer from a steel plate were studied using a two-dimensional finite element method-based transient inverse heat conduction model.

TL;DR: A survey of the literature dealing with factors behind the formation of accretions on the inner wall of the blast furnace stack is presented in this paper, where background factors of accretion are examined.

TL;DR: In this article, the impact of such misinterpretations on mean particle size and interfacial area per unit volume and even relative dispersed phase volume fraction is shown to be small and in some cases the errors can be significant.

TL;DR: In this paper, the chlorination behavior of two titania slags was studied in a laboratory chlorinator at 950 °C, and the differences operated on two time scales: within the first few minutes, nearly all of the FeO and MnO was chlorinated and then over tens of minutes the remaining material, largely TiO2, were chlorinated more slowly.

TL;DR: In this paper, the effects of alkaline (CaO and/or Na2CO3) additives, precalcination temperature, calcination time, leaching time, solution concentration, liquid/bauxite ratio and particle size on the efficiency of alumina and silica dissolution were investigated.

TL;DR: In this article, the effect of the type of carbon on β-Ta2O5 chlorination with Cl2-Ar and Cl2Ar-O2 gas mixtures was studied by isothermal and non-isothermal thermogravimetric measurements.

TL;DR: In this paper, it was shown that the activation enthalpy (Q) of self-diffusion may be considered as a direct measure of the interatomic force constant e/k = (p/R)Tm where p = Q/Tm is the activation coefficient.

TL;DR: In this article, the effects of intergranular precipitation (size of precipitates) and phosphorus grain boundary segregation on fracture and corrosion behaviors of the 18Cr-12Ni steel were investigated.