Abstract
Designing high‐performance refractory castables for aluminum and petrochemical applications is not a straightforward target as at their operation temperature range (800°C–1250°C) usual refractory binders show low‐bonding effectiveness and also low sinterability. Taking this into account, colloidal binders can anticipate the castable's densification and inhibit the drawbacks regarding the calcium aluminate hydrates’ decomposition, as the former does not present the typical hydraulic setting of traditional binders. To attain even better results, sintering additives can be incorporated to induce lower temperature densification. Nevertheless, the key issue is to select a suitable additive that is able to generate a transient liquid, leading to densification but with no refractoriness drawbacks, such as low‐hot mechanical properties. Considering these aspects, the objective of this work was to design a novel refractory material able to display a high performance within a wide temperature range. High erosion, hot mechanical and thermal shock resistances were attained pointing out an outstanding potential to increase the refractory lining working life of aluminum and petrochemical equipment units.
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