Showing papers in "Canadian Metallurgical Quarterly in 2007"

TL;DR: In this paper, the effect of frother type from that of bubble size, gas holdup is used as the correlating variable, and it is shown that the common frothers can be grouped into four families based on the water carrying rate-gas holdup relationship.

TL;DR: The adsorption of both dextrin and xanthate ions at the pyrite/aqueous solution and the galena-aqueous interface interfaces have been studied through batch adsorization tests through batch flotation tests as mentioned in this paper.

TL;DR: In this article, a study of the interfacial properties of the basal plane and the edge surfaces of talc is described, and the results show that the edge is much less hydrated than the base plane.

TL;DR: The scratch test consists of a diamond stylus moving over the surface of a sample under a normal force which is increased either stepwise or continuously until a critical normal force is reached as mentioned in this paper.

TL;DR: In this paper, a way to characterize (classify) frothers using gas hold-up as a surrogate for bubble size was explored, where nine surfactants with a range in chemical structures were selected and tested in a bubble column instrumented to measure gas holdup and superficial gas velocity.

TL;DR: In this article, the authors show that the conventional processes using a single flocculant, a single coagulant or a coagulate-flocant-combination combination are ineffective for transition and marine ore tailings.

TL;DR: In this paper, the effects of FSP parameters including forge force and traverse speed on the microstructure of an AZ31B-H24 magnesium alloy after friction stir processing (FSP) were examined.

TL;DR: In this paper, the synthesis and stability evaluation of mansfieldite (AlAsO4·2H2O) is described, which involves hydrothermal precipitation at 160 °C from equimolar (CAl = CAs = 0.3 M) Al (III) -As (V) nitrate solutions over a period of 24 hours.

TL;DR: In this article, the effect of electrolyte concentration on the Krafft point (KP) of dodecylammonium chloride was investigated in a potash ore flotation carried out in NaCl-KCl saturated brine.

TL;DR: In this article, high temperature flow behaviour and recrystallization kinetics of two high Mn Al-bearing twinning induced plasticity (TWIP) steels, 25Mn6Al and 30Mn4.5Al4Cr (in wt%) have been investigated using hot compression testing and compared with 25m and 25m3Al steels which were tested previously.

TL;DR: In this paper, the rheological properties of mineral suspensions are used to study the differences in behaviour of anisotropic talc and isotropic zircon minerals as a function of pH and polymer dosage (carboxymethyl cellulose, CMC).

TL;DR: In this paper, the effect of Al and flux additions on titanium recovery, ferrotitanium yield, and Ti/Al ratio were studied, and it was found that an increase in Al amount led to a decrease in Ti recovery and Ti /Al ratio.

TL;DR: In this paper, the role of bubbles in the transportation of hydrophobic particles to a froth phase in flotation is well established, and it is shown that bubbles are the primary means of transportation of flotation agents to the points of bubble-to-particle attachment.

TL;DR: In this paper, three novel dextrin polymers of varying functional group chemistry but similar molecular weight have been used to depress talc in single and mixed mineral studies and the results revealed a distinct hierarchy of effectiveness of the polymers in the depression of talc.

TL;DR: In this paper, the performance of a clay binding agent developed by Georgia-Pacific Resins, Inc. in enhancing coal and mineral flotation performance was evaluated using coal and potash samples.

TL;DR: In this article, a vision-based sensor for analyzing ladle eye dynamics in real time using a multivariate image analysis (MIA) technique based on principal component analysis (PCA).

TL;DR: In this paper, the effects of time, the concentration of the titanium dioxide and temperature were investigated by spectrophotometer, scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques.

TL;DR: In this article, a study of batch tests using stockpile samples and fresh samples oxidized in the lab showed that both the stockpile and the lab samples produced significantly inferior nickel grade recovery compared to the fresh sample due to a significant dilution effect by excessive flotation of pyrrhotite and non-floatability of some pentlandite.

TL;DR: In this paper, the effects of temperature and strain rate and the Zener-Hollomon parameter (Z) on the flow behavior and peak strain were investigated by continuous tests and the equation ϵ p = 4.3 × 10−4Z0.14 was proposed.

TL;DR: In the late 19th century, the discovery of rich nickel-copper sulphide ore bodies in Sudbury and the need for tonnage quantities of the metal to be used in nickel steel armour provided the foundation for establishing the Canadian nickel industry as discussed by the authors.

TL;DR: In this article, the atmospheric corrosion of Ni-bearing low alloy steels was investigated by wet/dry cyclic corrosion tests (CCT) in a 0.3% NaCl solution at 30 degrees C and 60% relative humidity (RH).

TL;DR: In this article, a thermogravimetric method was used to obtain the kinetic parameters of the reaction in the temperature range of 580 to 675 °C and under atmospheric pressure.

TL;DR: In this paper, the microstructure of a laser beam welded directionally solidified Inconel 738 (DS IN738) superalloy was studied and the results indicated that an increase in grain size produced by directional solidification processing can cau...

TL;DR: In this article, Fourier transform infrared spectroscopy studies show that sodium hexametaphosphate interacts with the Al sites on the diaspore and silicate minerals to form P-O-Al bonds through PO2 groups.

TL;DR: In this paper, the deposition of octadecylamine (ODA) at the KCl crystal/NaCl-KCl brine interface was investigated using atomic force microscopy (AFM).

TL;DR: In this article, the role of flotation reagents including activator, depressant and collector in tuning surface forces was investigated, and the measured long range forces were described with the classical or extended Derjaguin, Landau, Verwey and Overbeek (DLVO) theory.

TL;DR: A sessile drop investigation on the kinetics of carbon dissolution from an alumina-carbon composite and a commercial refractory (28.3% C, 66.67% alumina, 5% binder) into liquid...

TL;DR: In this article, the authors characterize the high temperature behavior of direct reduced iron (DRI) fines, which could potentially be injected into liquid steel to reduce the nitrogen nitrogen consumption.

TL;DR: In this paper, the influence of pre-bending on the characteristics of aluminum alloy tubes for the hydroforming process was investigated, where tube bending experiments were performed on 2 and 3.5 mm wall thicknesses with 76.2 mm outer diameter EN-AW5018 tube.

TL;DR: In this article, the authors used the equilibrium module of Outokumpu HSC Chemistry® 5.1 to calculate the composition of the products resulting from the reaction of a control dust composition with hydrogen over the temperature range from 1273 to 1873 K and at atmospheric pressure (1 bar).