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US 9,284,208 B2Granted
Refractory block and glass-melting furnace
AssigneeSaint-Gobain Centre De Recherches Et D'Etudes Europeen
InventorsIsabelle Cabodi, Michel Gaubil
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Abstract
The present invention relates to a fused refractory product having the following average chemical composition, as a percentage by weight on the basis of the oxides and for a total of 100%: ZrO2: 60.0%-80.0%; SiO2: 4.0%-10.0%; Al2O3: balance to 100%; Y2O3≦5.0%; Na2O+K2O+B2O3≧0.3% and SiO2/(Na2O+K2O+B2O3)≧5.0; other oxide species: ≦2.0%; the ratio of the ZrO2/Al2O3 weight contents being between 2.0 and 6.0.
Claims16
A fused refractory product having the following chemical composition, in percentage by weight based on the oxides and for a total of 100%:
- ZrO2:
- 60.0%-80.0%;
- SiO2 :
- 4.0%-9.5%
- Al2O3:
- complement to 100%;
- Y2O3≦5.0%;
- other oxide species:
- ≦2.0%;
- and
- the ratio of the contents by weight ZrO2/Al2O3 being at least 2.0 and less than 5.0.
8 more elements
Dependencies are inferred from the claim text.