Characterization of red mud aggregate populations generated under shear conditions

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Mots clés : Flocculants;Aggregates;Shear conditions;Red mud particles
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Sommaire: The recovery of additions in light metals is an important parameter influencing consistency of the finished product, which ultimately means cost. Recovery is a function of many parameters such as assimilation speed, addition density, addition practice, liquid metal processing conditions, etc. In liquid metal processing operations, it is desirable to have the maximum possible recovery at the shortest possible time. In this paper a new index will be presented, namely, the rate of recovery (RR)....
Publication: CIM Bulletin
Auteur(s): S.A. Argyropoulos, M. Pekguleryuz
Mots clés: Light metals, Additions, Recovery, Aluminum, Liquid aluminum, Alloys
Numéro: 1062
Volume: 95
Année: 2002
Texte
Sommaire: In 1999, PFC measurements were carried out at Alcan smelters as part of a large measurement campaign led by the Canadian Aluminium Association. Side worked prebake (SWPB) and horizontal stud Söderberg (HSS) plants in Arvida were the selected sites. CF4 and C2F6 emissions were measured continuously in the exhaust duct and at the roof vents for a week. In parallel, voltages from four designated cells were recorded at a high scan rate. Results were analyzed and correlations between voltage,...
Publication: CIM Bulletin
Auteur(s): A. Gosselin
Mots clés: Voltage measurement, Gas measurement, Anode effect, PFC emissions
Numéro: 1062
Volume: 95
Année: 2002
Texte
Sommaire: This paper examines the impact of the various assumptions that go into an economic evaluation, and shows how these can be combined to show an exciting result that may not really exist. An example of an embellished case (the kind that one frequently sees when projects are being promoted) is developed and the cumulative impact is analyzed to show the actual project underneath. The paper also points out some areas to watch for overly optimistic assumptions such as prices, inflation, and debt....
Publication: CIM Bulletin
Auteur(s): L.D. Smith
Mots clés: Economic evaluation, “Bare bones,” Cash flow, Discount rates, Net present value (NPV), Internal rate of return (IRR)
Numéro: 1062
Volume: 95
Année: 2002
Texte
Sommaire: Since 1975, the Aluminium Pechiney Research Centre at Saint-Jean-de-Maurienne (LRF) has been concentrating its efforts on designing, testing and perfecting the Aluminium Pechiney point-fed prebaked reduction cell. In 1979, the AP18 cell (180 kA) was industrially launched with the construction and start-up of the F line in Saint-Jean. The following generation, the AP30 (300 kA), with prototypes started in 1981, was launched in 1986 on the Saint-Jean G line. Along with cell design, efficient...
Publication: CIM Bulletin
Auteur(s): C. Vanvoren
Mots clés: Aluminum, Reduction cell, Process control, Design, Aluminum Pechiney
Numéro: 1062
Volume: 95
Année: 2002
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