| abstract |
Pressed or cast carbonaceous oxide-based refractory products containing at least 5% by weight of a refractory oxide consisting of a mixture of carbonaceous binders, additional carbonaceous supports having a high carbon content and other oxides and / or non-oxides, and having an oxidation protective surface glaze, characterized in that in the molding compositions additionally 1 to 20 wt .-% finely powdered metals or alloys based on silicon, 1 to 10 wt .-% finely ground flux and 1 to 20 wt .-% of fine silica are included and in addition after coking an outer glaze is applied. |