Abstract
In this article, a newly developed sensor that measures bath and liquidus temperatures is described. The accuracy and reproducibility of the sensor are discussed, and the sensor’s output is compared with results obtained using other techniques. A series of measurements in point-feed and center-worked cells are given. Finally, the evolution of bath and liquidus temperature is shown with respect to feed strategies.
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M.P. Taylor, “Static and Dynamic Energy Balance in Reduction Cells,” (paper presented at the International Course on the Process Metallurgy of Aluminium, Trondheim, Norway, 24–28 May, 1993).
B.J. Welch and X. Liu, “Thermochemistry of Electrolyte and Cell Operation,” (paper presented at the International Course on the Process Metallurgy of Aluminium, Trondheim, Norway, 3–7 June, 1996).
A. Solheim et al., “Liquidus Temperature and Alumina Solubility in the System Na3AlF6-AlF3-LiF-CaF2-MgF2,” Light Metals, ed. J.W. Evans (Warrendale, PA: TMS, 1995), pp. 451–460.
E.W. Dewing, “Loss of Current Efficiency in Aluminum Electrolysis Cells,” Met. Trans B, 22B (1991), pp. 177–182.
G.I. Kuschel and B.J. Welch, “Further Studies of Alumina Dissolution Under Conditions Similar to Cell Operation,” Light Metals, ed. E. Rooy (Warrendale, PA: TMS, 1991), pp. 299–305.
M. Segatz and C. Droste, “Analysis of Magnetohydrodynamic Instabilities in Aluminum Reduction Cells,” Light Metals, ed. U. Mannweiler (Warrendale, PA: TMS, 1994), p. 313–332.
N. Urata, “Magnetics and Metal Pad Instability,” Light Metals, ed. H.O. Bohner (Warrendale, PA: TMS, 1985), p. 581–591.
T.A. Utigard, “Density of the Na3AlF6-AlF3-Al2O3-CaF2 System: A Key to the Performance of Hall-Héroult Cells,” Light Metals, ed. S.K. Das (Warrendale, PA: TMS, 1993), pp. 239–245.
W.K. Fischer et al., “Interdependence Between Anode Net Consumption and Pot Design, Pot Operating Parameters and Anode Properties,” Light Metals, ed. E. Rooy (Warrendale, PA: TMS, 1991), pp. 681–686.
M. Sørlie et al., “Early Failure Mechanisms in Aluminium Cell Cathodes,” Light Metals, ed. S.K. Das (Warrendale, PA: TMS, 1993), pp. 299–308.
D.J. Madsen, “Temperature Measurement and Control in Reduction Cells,” Light Metals, ed. E.R. Cutshall (Warrendale, PA: TMS, 1992), pp. 453–456.
P. Verstreken and S. Benninghoff, “Bath- and Liquidus Temperature Sensor for Molten Salts,” Light Metals, ed. W. Hale (Warrendale, PA: TMS, 1996), pp. 437–444.
P. Verstreken, “Superheat Sensor for Electrolytic Hall-Héroult Cells,” Proc. 5th Int. Conf. Molten Slags, Fluxes and Salts (Warrendale, PA: ISS, 1997).
Kobbeltvedt et al., “Liquidus Probe for Hall-Héroult Baths,” Proc. 9th Int. Symp. on Light Metals Production (Norway: NTNU, 1997).
G.J. Kipouros and D.R. Sadoway, “Molten Salts: Fundamentals and Industrial Applications” (short course presented at the 1995 TMS Annual Meeting, Las Vegas, NV, 11 February, 1995).
J.L. Holm, “The Phase Diagram of the System Na3AlF6-CaF2 and the Constitution of the Melt in the System,” Acta Chem Scand., 22 (3) (1968), pp. 1004–1012.
G.P. Tarcy et al., “Systematic Alumina Measurement Errors and Their Significance in the Liquidus Enigma,” Light Metals, ed. S.K. Das (Warrendale, PA: TMS, 1993), pp. 227–232.
W. Haupin, “The Liquidus Enigma,” Light Metals, ed. E.R. Cutshall (Warrendale, PA: TMS, 1992), pp. 477–480.
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P. Verstreken earned his Met.Eng. in metallurgy at the University of Louvain, Belgium, in 1978. He is currently senior manager in the aluminum business area at Heraeus Electro-Nite. Mr. Verstreken is also a member of TMS.
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Verstreken, P. Employing a new bath- and liquidus temperature sensor for molten salts. JOM 49, 43–46 (1997). https://doi.org/10.1007/s11837-997-0011-x
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DOI: https://doi.org/10.1007/s11837-997-0011-x