Fired refractory ceramic molded part used for lining waste incineration furnaces has a spinel matrix

摘要

Fired refractory ceramic molded part has a spinel matrix based on (Mg)<2+> (Al, Cr)2<3+>O4, in which coarser grains are based on chromium corundum and/or corundum and based on ZrO2. An Independent claim is also included for a composition used in the production of the molded part, comprising 2-35 wt.% Cr2O3 having a grain fraction of less than 0.5 mm, 1-15 wt.% ZrO2 having a grain fraction of at least 0.2 mm, 1-12 wt.% MgO having a grain fraction of less than 0.5 mm, and 38-96 wt.% Al2O3 having a grain fraction of less than 10 mm. Preferred Features: The coarser grains are made from chromium corundum and zirconium corundum having an average diameter (d50) of 0.5-10 mm. The spinel matrix makes up 10-70 wt.% of the total composition.