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Thermodynamic Assessment of the Chemical Durability of Refractory Lining in Anode Baking Furnaces

Trond Brandvik, Arne Petter Ratvik

2001enrefractoryanodebakingchemicaldurability

Abstract

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The aluminosilicate refractory lining in anode baking furnaces undergoes thermal cycling and is exposed to harsh chemical environments, affecting its thermal stability and chemical durability. This study presents a thermodynamic assessment of the stability of aluminosilicate materials relevant to the chemical environment of anode baking furnaces. We identify volatile species from anodes, based on their typical chemical composition, and evaluate the most likely chemical reactions involving these volatiles and the oxide components of the lining. The research particularly focuses on the volatility of substances due to thermal cycling and reducing conditions present during anode baking. We predict changes in the mineralogical composition of the lining using thermodynamic calculations, summarized through isothermal predominance phase diagrams. Our findings suggest that the formation of sodium aluminosilicate phases and volatile SiF4 represent significant consequences of chemical degradation of the lining, primarily due to the presence of cryolite traces in the green anodes.

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Cite This Work

@article{1fb67ee2-036f-4953-8de3-47194513c457,
  title={Thermodynamic Assessment of the Chemical Durability of Refractory Lining in Anode Baking Furnaces},
  author={Trond Brandvik and Arne Petter Ratvik},
  year={2001},
  language={en}
}
TY  - JOUR
TI  - Thermodynamic Assessment of the Chemical Durability of Refractory Lining in Anode Baking Furnaces
AU  - Trond Brandvik
AU  - Arne Petter Ratvik
PY  - 2001
LA  - en
ER  -

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