Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High zirconia fused cast refractory
The present invention provides a high zirconia fused cast refractory that suffers less cracks in production and on heating, has excellent productivity, is hard to form zircon crystals with the refractory solely and under conditions where the refractory is in contact with molten glass, is hard to suffer cracks on receiving heat cycles in operation of a glass melting furnace, and has durability for a prolonged period of time. A high zirconia fused cast refractory containing, as chemical components, from 85 to 95% by weight of ZrO2, from 0.4 to 2.5% by weight of A12O3, from 3.5 to 10% by weight of SiO2, from 0.05 to 1% by weight in total of Na2O and K2O, more than 0.04% by weight and 1% by weight or less of B2O3, 0.02% by weight or less of P2O5, 0.05% by weight or less of MgO, from 0.01 to 0.2% by weight of CaO, in the case where any one of SrO and BaO is contained, from 0.3 to 3% by weight of SrO or more than 0.5% by weight and 3% by weight or less of BaO, and in the case where both of them are contained, 0.3% by weight or more of SrO and from 0.3 to 3% by weight in total of SrO and BaO, from 0.01 to 0.7% by weight of Sn02, and 0.3% by weight or less in total of Fe2O3 and TiO2.
High zirconia fused cast refractory
The present invention provides a high zirconia fused cast refractory that suffers less cracks in production and on heating, has excellent productivity, is hard to form zircon crystals with the refractory solely and under conditions where the refractory is in contact with molten glass, is hard to suffer cracks on receiving heat cycles in operation of a glass melting furnace, and has durability for a prolonged period of time. A high zirconia fused cast refractory containing, as chemical components, from 85 to 95% by weight of ZrO2, from 0.4 to 2.5% by weight of A12O3, from 3.5 to 10% by weight of SiO2, from 0.05 to 1% by weight in total of Na2O and K2O, more than 0.04% by weight and 1% by weight or less of B2O3, 0.02% by weight or less of P2O5, 0.05% by weight or less of MgO, from 0.01 to 0.2% by weight of CaO, in the case where any one of SrO and BaO is contained, from 0.3 to 3% by weight of SrO or more than 0.5% by weight and 3% by weight or less of BaO, and in the case where both of them are contained, 0.3% by weight or more of SrO and from 0.3 to 3% by weight in total of SrO and BaO, from 0.01 to 0.7% by weight of Sn02, and 0.3% by weight or less in total of Fe2O3 and TiO2.
High zirconia fused cast refractory
KUBOKI TOSHIMITSU (Autor:in) / SUGIYAMA HIROSHI (Autor:in) / MISU YASUO (Autor:in) / HASHIMOTO ITARU (Autor:in)
29.04.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
/
C03B
Herstellung oder Formgebung von Glas, Mineral- oder Schlackenwolle
,
MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL
/
F27B
Industrieöfen, Schachtöfen, Brennöfen, Retorten allgemein
,
FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL
/
F27D
Einzelheiten oder Zubehör für Industrieöfen, Schachtöfen, Brennöfen oder Retorten, soweit sie nicht auf eine Ofenart eingeschränkt sind
,
DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE