Experimental study of the thermo-mechanical behaviour of alumina-silicate refractory materials based on a mixture of Algerian kaolinitic clays

Composition and Refractory Properties of Mixtures of Moroccan Silica-Alumina Geomaterials and Alumina

“…The firing temperature of brick made using the clays also influences properties, with higher temperatures enhancing densification by the formation of a liquid phase. The liquid phase is formed by reactions that occur in the presence of free silica, alumina and alkaline, in accordance with the ternary SiO 2 -Al 2 O 3 -R 2 O system [2]. The used clays are known for their high plasticity, which allows the introduction of a considerable quantity of silica sand to reduce the heating shrinkage and to ensure dimensional stability during thermal treatments.…”

“…Several studies carried out on refractory clay materials [1][2][3]8,9] showed that the sintered brick characteristics are influenced by the mineralogical composition of clays and the firing temperature. The firing temperature of brick made using the clays also influences properties, with higher temperatures enhancing densification by the formation of a liquid phase.…”

“…The incorporation of red clay in the mixture enables adjustment of the physical properties of the fired material. Refractoriness of a material is strongly dependent on microstructural parameters such as grain size and shape, the relative volume of solid and vitreous phases, the viscosity of the vitreous phase, and sample porosity [2]. Refractoriness can be evaluated by examining the evolution of the morphology of test samples with increasing temperature under their own weight (without any other load).…”

“…Refractory materials most commonly used for lining furnace walls are synthesized mainly from silica-alumina geomaterials [1][2][3]. The control of the quality of refractory demands a wide knowledge in various scientific fields (geology, mineralogy, geochemistry, thermodynamics, mechanics ···).…”

“…The main mineral constituent of the kaolin is the kaolinite. Its theoretical formula is Al 2 The aim of this study is to synthesize the mullite by high temperature treatment of local Moroccan silicaalumina geomaterials (kaolin clay, red clay and silica sand), as well as two varieties of alumina, pure alumina (A p ) and alumina (A R ) recovered from waste of silicaalumina refractory bricks.…”