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HIGH ZIRCONIA ELECTRIC MOLTEN CAST REFRACTORY
PROBLEM TO BE SOLVED: To provide a high zirconia electric molten cast refractory less in cracks during manufacturing and increasing temperature, excellent in expandability to a molten glass, hardly generation fissures even with a thermal cycle during operating a glass melting kiln and having durability for long time.SOLUTION: There is provided a high zirconia electric molten cast refractory having a chemical component containing ZrO2 of 85 to 95 wt.%. Al2O3 of 0.4 to 2.5 wt.%, SiO2 of 3.5 to 10.0 wt.%, Na2O of 0.05 wt.% or more, Na2O and K2O of total 0.05 to 0.7 wt.%, B2O3 of 0.01 to 0.04 wt.%, the content of SrO or BaO of 0.1 to 3.0 wt.% or SrO of 0.1 wt.% or more and SrO and BaO of total 0.1 to 3.0 wt.%, CaO of 0.01 to 0.2 wt.%, MnO of 0.1 wt.% or less, SnO2 of 0.01 to 0.7 wt.%, Fe2O3 and TiO2 of total 0.3 wt.% or less, P2O5 of less than 0.01 wt.% and CuO of less than 0.01 wt.%.SELECTED DRAWING: Figure 1
【課題】製造時及び昇温時の割れが少なく、溶融ガラスに対する発泡性に優れ、ガラス溶解窯操業中の熱サイクルを受けても亀裂が発生しにくい、長期間の耐久性を備えた高ジルコニア電気溶融鋳造耐火物の提供。【解決手段】化学成分として、ＺｒＯ2が８５〜９５重量％であり、Ａｌ2Ｏ3が０．４〜２．５重量％、ＳｉＯ2が３．５〜１０．０重量％、Ｎａ2Ｏが０．０５重量％以上でＮａ2ＯとＫ2Ｏの合計が０．０５〜０．７重量％、Ｂ2Ｏ3が０．０１〜０．０４重量％、ＳｒＯ或いはＢａＯの含有量が０．１〜３．０重量％、またはＳｒＯが０．１重量％以上でＳｒＯとＢａＯの合計量が０．１〜３．０重量％、ＣａＯが０．０１〜０．２重量％、ＭｇＯが０．１重量％以下、ＳｎＯ2が０．０１〜０．７重量％、Ｆｅ2Ｏ3とＴｉＯ2の合計が０．３重量％以下、Ｐ2Ｏ5が０．０１重量％未満、ＣｕＯが０．０１重量％未満である高ジルコニア電気鋳造耐火物とする。【選択図】図１
HIGH ZIRCONIA ELECTRIC MOLTEN CAST REFRACTORY
PROBLEM TO BE SOLVED: To provide a high zirconia electric molten cast refractory less in cracks during manufacturing and increasing temperature, excellent in expandability to a molten glass, hardly generation fissures even with a thermal cycle during operating a glass melting kiln and having durability for long time.SOLUTION: There is provided a high zirconia electric molten cast refractory having a chemical component containing ZrO2 of 85 to 95 wt.%. Al2O3 of 0.4 to 2.5 wt.%, SiO2 of 3.5 to 10.0 wt.%, Na2O of 0.05 wt.% or more, Na2O and K2O of total 0.05 to 0.7 wt.%, B2O3 of 0.01 to 0.04 wt.%, the content of SrO or BaO of 0.1 to 3.0 wt.% or SrO of 0.1 wt.% or more and SrO and BaO of total 0.1 to 3.0 wt.%, CaO of 0.01 to 0.2 wt.%, MnO of 0.1 wt.% or less, SnO2 of 0.01 to 0.7 wt.%, Fe2O3 and TiO2 of total 0.3 wt.% or less, P2O5 of less than 0.01 wt.% and CuO of less than 0.01 wt.%.SELECTED DRAWING: Figure 1
【課題】製造時及び昇温時の割れが少なく、溶融ガラスに対する発泡性に優れ、ガラス溶解窯操業中の熱サイクルを受けても亀裂が発生しにくい、長期間の耐久性を備えた高ジルコニア電気溶融鋳造耐火物の提供。【解決手段】化学成分として、ＺｒＯ2が８５〜９５重量％であり、Ａｌ2Ｏ3が０．４〜２．５重量％、ＳｉＯ2が３．５〜１０．０重量％、Ｎａ2Ｏが０．０５重量％以上でＮａ2ＯとＫ2Ｏの合計が０．０５〜０．７重量％、Ｂ2Ｏ3が０．０１〜０．０４重量％、ＳｒＯ或いはＢａＯの含有量が０．１〜３．０重量％、またはＳｒＯが０．１重量％以上でＳｒＯとＢａＯの合計量が０．１〜３．０重量％、ＣａＯが０．０１〜０．２重量％、ＭｇＯが０．１重量％以下、ＳｎＯ2が０．０１〜０．７重量％、Ｆｅ2Ｏ3とＴｉＯ2の合計が０．３重量％以下、Ｐ2Ｏ5が０．０１重量％未満、ＣｕＯが０．０１重量％未満である高ジルコニア電気鋳造耐火物とする。【選択図】図１
HIGH ZIRCONIA ELECTRIC MOLTEN CAST REFRACTORY
高ジルコニア電気溶融鋳造耐火物
SUGIYAMA HIROSHI (author) / KUBOKI TOSHIMITSU (author) / HASHIMOTO ITARU (author) / MISU YASUO (author)
2016-05-12
Patent
Electronic Resource
Japanese
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
HIGH ELECTRICAL RESISTANT HIGH ZIRCONIA ELECTRIC MELTING CAST REFRACTORY
| European Patent Office | 2016