Refractory product having a high content of zirconia
AssigneeSaint-Gobain Centre De Recherches Et D'Etudes Europeen
InventorsIsabelle Cabodi, Pierrick Fabien Vespa
Life of this patent
Estimating the term…
Abstract
Fused cast refractory product including, as weight percentages on the basis of the oxides and for a total of 100%: ZrO2: balance to 100%, Hf2O: <5%, SiO2: 8.1% to 12.0%, B2O3: 0.20% to 0.90%, Na2O+K2O: 0.40% to 0.80%, Al2O3: 0.3% to 2.0%, Y2O3: <2.0%, Fe2O3+TiO2: <0.6%, and other species: <1.5%.
Claims11
A glass melting furnace comprising a block positioned in the superstructure and made of a fused cast refractory product comprising, as weight percentages on the basis of the oxides and for a total of 100%:
- ZrO2:
- balance to 100%
- Hf2O:
- <5%
- SiO2:
- 8.1% to 12.0%
- B2O3:
- 0.20% to 0.90 %
- Na2O + K2O:
- 0.40% to 0.80%
- Al2O3:
- 0.3% to 2.0%
- Y2O3:
- <2.0%
- Fe2O3 + TiO2:
- <0.6%
- other species:
- <1.5%.
A glass melting furnace comprising a block positioned in the superstructure and made of a fused cast refractory product comprising, as weight percentages on the basis of the oxides and for a total of 100%:
- ZrO2:
- balance to 100%
- Hf2O:
- <5%
- SiO2:
- 8.1% to 12.0%
- B2O3:
- 0.20% to 0.90%
- Na2O + K2O:
- 0.40% to 0.80%
- Al2O3:
- 0.3% to 2.0%
- Y2O3:
- <2.0%
- Fe2O3 + TiO2:
- <0.6%
- other species:
- <1.5%,
- wherein the block has been manufactured according to a process comprising the following successive steps:
- melting a mixture of raw materials to obtain a molten material,
- casting the molten material in a mold,
- solidifying the molten material in the mold, to obtain a solidified material, and
- controlled cooling the solidified material in order to bring a temperature of the solidified material to ambient temperature without fracturing.
Dependencies are inferred from the claim text.