Acta Chimica Slovaca (ACS) publishes papers on fundamental and applied aspects of chemistry, biochemistry, chemical technology, chemical engineering and process control, biotechnology and food technology. Welcome are also topics which include chemical aspects of materials, physical chemistry and chemical physics, analytical chemistry, macromolecular chemistry and biomedical engineering.

A new type of Aluminium Smelting Baths Electrical Conductivity

Dalibor Uher, Ľuboš Čirka a, Ján Kamenár, Ján Híveš *

Department of Inorganic Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovak Republic
a Department of Information Engineering and Process Control, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovak Republic

E-mail: * jan.hives@stuba.sk

Abstract: The electrical conductivity of low-melting electrolytes (AlF3-rich, e.g. n(NaF)/n(AlF3) = 1.4, with additives Al2O3 and CaF2) was determined using a pyrolytic BN tube type cell. AC — techniques with a sine wave signal with 10 mV amplitude in the high frequency range were applied. Basic melt contained 58.33 mol % NaF and 41.67 mol % AlF3. To this melt 2 wt % alumina and/or 5 wt % calcium fluoride were added. The electrical conductivity data in the molten system can be described by a simple equation of the Arrhenius type:
κ = A e -B / T
where κ represents the electrical conductivity (Ω-1 cm-1), T is the temperature (K), A and B are constants for the measured system.

Keywords: acid melts, aluminium, cryolite-based melts, electrical conductivity, low temperature

Full paper in Portable Document Format: acs_0033.pdf

Acta Chimica Slovaca, Vol. 2, No. 1, 2009, pp. 25—30