Analysis of results from a PFC measurement campaign

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Mots clés : Voltage measurement;Gas measurement;Anode effect;PFC emissions
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Sommaire: In the Bayer process, flocculants are introduced in the feed well to enhance the aggregation of red mud particles. To gain a better understanding of the flocculation process taking place in the feed well, shear-induced flocculation was achieved using concentric rotating cylinders (Couette system). Our previous work has shown the effect of the shear rate on the aggregate’s settling rate and on residual turbidity of the Bayer liquor. In this study, the data demonstrated that the aggregates at...
Publication: CIM Bulletin
Auteur(s): M.J. Gagnon, G. Simard, A. Charette, G. Péloquin
Mots clés: Flocculants, Aggregates, Shear conditions, Red mud particles
Numéro: 1062
Volume: 95
Année: 2002
Texte
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: 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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