Extreme temperature in refractory applications: some examples from the field

Reference Presenter Authors
14-039 Frédéric Roulet Roulet, F.(Saint-Gobain CREE); San-Miguel, L.(Saint-Gobain CREE); Francy, O.(Saint-Gobain CREE); Boumahdi, N.(Saint-Gobain CREE); Cabodi, I.(Saint-Gobain CREE); The general purpose of refractory materials is to confine hot chemical reactions or hold hot liquids at various temperatures. The contact temperature spectrum can greatly vary from some hundreds of Celsius to more than 2200°-2500°C in peak for the hottest ones. On top of the intrinsic local temperatures, refractory materials are subjected to various solicitations such as mechanical load, solid abrasion, gas ablation, thermal shock and chemical attacks. This mix of various and often combined solicitations leads to adapt the refractory solutions on a case-by-case basis and in a cost effective manner, as well as to design them as globally engineered systems for the longest possible life time. This paper will describe some case studies of refractory applications operating at very high temperature, above 1600°C, in various environments where materials are pushed to their limits. These case studies will be looked into from the field of carbon black reactors, tuyere area of blast-furnace, chromium melting in induction furnace and a specialty glass furnace. On top of these case studies, a special emphasis will show the extreme importance of understanding better and taking care of the thermal transfer in refractory lining with the need to provide better insulating solutions.
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