Demagging Processes for Aluminum Alloy Scrap

Tiwari, Basant L.

doi:10.1007/bf03338052

Cited by 15 publications

(7 citation statements)

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“…Sensors based on this technique are used to determine the Mg concentration during Mg removal of the Al alloys. They are also used in production of aluminum [10,11].…”

Section: Introductionmentioning

confidence: 99%

Study of the Thermodynamic Properties of the Al-Mg Binary System Between 973-1073 K by the EMF Method

Aghdam¹,

Soltanieh²

2010

Canadian Metallurgical Quarterly

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The thermodynamic properties of an Al-Mg binary system with 0.07 to 12.10 at% Mg were determined at temperatures between 973-1073 K. The following Mg concentration cell was used: Mg (pure), MgCl 2 -CaCl 2 (eutectic), Al-Mg (melt). In this system, Mg shows negative deviation from Raoult's law. Alloys between 0 to 6 at% Mg obey Henry's law. The Henrian coefficient of Mg was 0.47, 0.52 and 0.53 at 973, 1023 and 1073 K, respectively. The EMF values were used for calculating the partial and integral Gibbs free energies, enthalpies, entropies, excess Gibbs free energies and Wagner's first order interaction coefficient. Résumé-On a déterminé les propriétés thermodynamiques d'un système binaire d'Al-Mg ayant de 0.07 à 12.10% at. de Mg, à des températures entre 973 et 1073 K. On a utilisé la cellule de concentration de Mg suivante: Mg (pur) | MgCl 2 -CaCl 2 (eutectique) | Al-Mg (bain). Dans ce système, le Mg montre une déviation négative de la loi de Raoult. Les alliages entre 0 et 6% at. de Mg obéissent à la loi de Henry. Le coefficient de Henry du Mg était de 0.47, 0.52 et 0.53 à 973, 1023 et 1073 K, respectivement. On a utilisé les valeurs EMF pour calculer les énergies libres de Gibbs, partielles et intégrales, les enthalpies, les entropies, les énergies libres de Gibbs en excès et le coefficient d'interaction du premier ordre de Wagner.

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“…Sensors based on this technique are used to determine the Mg concentration during Mg removal of the Al alloys. They are also used in production of aluminum [10,11].…”

Section: Introductionmentioning

confidence: 99%

Study of the Thermodynamic Properties of the Al-Mg Binary System Between 973-1073 K by the EMF Method

Aghdam¹,

Soltanieh²

2010

Canadian Metallurgical Quarterly

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“…Chlorination methods have been used in the industry for several years. 4,5 However, due to pollution problems caused by the fumes, many countries have imposed strict regulations forbidding this method of magnesium removal. Conversely, electrolytic methods are an efficient way to remove magnesium without producing environmental hazards.…”

Section: Introductionmentioning

confidence: 99%

Analysis of fluid flow in 1 : 2 physical model scale of reverberatory furnace for molten aluminium refining

Juárez¹,

Flores²

2010

International Journal of Cast Metals Research

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This work presents a detailed analysis on cycle and mixing times for a reverberatory furnace 5 t molten aluminium capacity, using physical modelling. Performance of systems with different geometrical design features and different kinds of impellers were studied while determining the velocity of the fluid along the chambers of the furnace. The results of the experiments were compared to the results at industrial level, before and after changes to the geometric design, as well as on the dynamic conditions of processing. The changes in the model consisted of attaching baffles in front of the floodgates in melting chamber and two more in the back corners. These baffles helped to break the flow patterns, while in the stagnant zones, helped to increase fluid flow velocity, reducing cycle and mixing times. From the improvements implemented, better efficiency of reaction between dissolved magnesium in molten aluminium and SiO 2 particles was found.

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“…The removal of magnesium from molten aluminum alloys can be accomplished by using one of the following methods: Chlorination injection, electrochemical process and the submerged powder injection technique. The chlorine injection method 2,3 is commonly used, but the pollution generated limits its application. The electrochemical method 4,5 is a clean but expensive treatment due to the high cost of electrical energy.…”

Section: Introductionmentioning

confidence: 99%

Application of Computational fluid dynamic in aluminum refining through pneumatic injection of powders

et al. 2014

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Magnesium removal process from molten aluminum using particles of silica sand was studied from a hydrodynamic point of view using computational fluid dynamics (CFD). The gas-liquid flow was modeled by a model of the Euler type for both gas and liquid phase transport. Newton´s law of motion was used to describe the subsurface motion of injected solid particles from the calculated flow field in one-way coupling. The kinetics of the transitory reaction was described by using the model proposed by Ohguchi and Robertson for transitory reactions. The contacting method of reaction for silica particles of 75, 210 and 425 µm was established according to its dynamic interaction with the two phases flow. When the particle size was increased, the residence time increased as well; however, the efficiency for the transitory reaction was decreased. The reaction rate simulation showed a good agreement with experimental results reported in the literature.

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Demagging Processes for Aluminum Alloy Scrap

Abstract: SUMMARY

Cited by 15 publications

References 0 publications

Study of the Thermodynamic Properties of the Al-Mg Binary System Between 973-1073 K by the EMF Method

Study of the Thermodynamic Properties of the Al-Mg Binary System Between 973-1073 K by the EMF Method

Analysis of fluid flow in 1 : 2 physical model scale of reverberatory furnace for molten aluminium refining

Application of Computational fluid dynamic in aluminum refining through pneumatic injection of powders

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