Sintered refractory zircon mullite composite, process for its preparation and its use

摘要

The present invention relates to a 55 wt .-% to 65 wt .-% Al2O3, 15 wt .-% to 25 wt .-% SiO2, 15 wt .-% to 25 wt .-% ZrO2 and less than 3 wt. % raw material contaminants comprising sintered zirconium mullite refractory composite, wherein the mineralogical composition of the composite comprises 65% to 85% mullite and 15% to 35% zirconia by weight.