refractory ceramic product mix cooked and components for production.

refractory ceramic product cooked, comprising the following mineralogical phases: 1.1 70-98% by weight of spinel MgO-Al2O3 stoichiometric with 28.33 ± 0.5% by weight MgO and 71,67 ± 0 , 5% by weight of Al2O3 1.2 1-15% by weight of forsterite 1.3 1-15% by weight of periclase 1.4 to 10% by weight of other mineralogical phases, their sum being 100% by weight.