INVESTIGADORES
TOMBA MARTINEZ Analia Gladys
congresos y reuniones científicas
Título:
ADVANCES IN THERMODYNAMIC SIMULATION OF Al2O3-MgO CASTABLE CORROSION
Autor/es:
ANA P. LUZ ; VICTOR C. PANDOLFELLI ; MARIANA A.L. BRAULIO; ANALÍA G. TOMBA MARTINEZ
Reunión:
Congreso; 55th International Colloquium on Refractories 2012; 2012
Resumen:
In this work, the chemical corrosion of two Al2O3-MgO castables
(containing hydratable alumina or calcium aluminate cement as
binder sources) was evaluated via thermodynamic calculations.
Besides that, a critical analysis of three simulation models were
carried out, considering: (1) the slag-castable interaction as a
function of the reaction rate , (2) the changes in the slag composition due to its reaction with the castable components, assuming
the direct contact between the liquid and the overall castable
compositions, and (3) the slag-matrix and slag-aggregates interactions
evaluated separately. The theoretical results were further
compared with experimental corrosion cup-tests data. Although
the thermodynamic evaluation of the overall castable compositions
was able to correctly identify the phase transformations, a
two-step analysis of the liquid interaction with the matrix components
and later with the aggregate particles, seems to be the best
alternative to predict the different corrosion performance of the
two designed refractory materials.