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HIGH ZIRCONIA ELECTRICALLY FUSED CAST REFRACTORY
제조시 및 승온시의 균열이 적어, 생산성이 우수하며, 내화물 단체로도, 지르콘 결정을 생성하기 어려워, 유리 용해로 조업 중 열사이클을 받아도 균열이 발생되기 어려운, 장기간의 내구성을 갖춘 고전기저항 고지르코니아 전기용융 주조 내화물의 제공한다. 화학성분으로서 ZrO가 85∼95중량%이며, AlO가 0.1∼0.8중량% 미만, SiO가 3.5∼10.0중량%, NaO와 KO의 합계가 0.05중량% 미만, BO가 0.1∼1.5중량%, MgO가 0.1 중량% 이하, CaO가 0.01∼0.2중량%, BaO와 SrO에 관해서는, 단독으로 함유하는 경우는, BaO가 0.05∼3.0중량%, 혹은, SrO가 0.01∼3.0중량%, 쌍방 포함하는 경우는, SrO가 0.01중량% 이상이며 SrO와 BaO의 합계가 0.01∼3.0중량%, SnO가 0.1∼0.7중량%, FeO와 TiO의 합계가 0.3중량% 이하, PO가 0.01중량% 미만, CuO가 0.01중량% 미만으로 포함되고, 고온에서의 고전기저항 특성을 가지며, 또, 내화물 단체, 용융 유리와 접촉한 조건에서의 가열이라도 지르콘 결정 생성이나 성장을 현저하게 억제할 수 있는 고지르코니아 전기용융 주조 내화물.
A high zirconia electrically fused cast refractory of high electric resistance having long time durability, less suffering from cracking during production and upon temperature rising, excellent in productivity, less forming zircon crystals even upon heating the refractory in itself and when the refractory is in contact with molten glass, generating less cracks even when undergoing heat cycles during operation of a glass melting furnace is provided. A high zirconia electrically fused cast refractory has, as chemical components, 85 to 95% by weight of ZrO2, 0.1 to less than 0.8% by weight of Al2O3, 3.5 to 10.0% by weight of SiO2, less than 0.05% by weight of Na2O and K2O in total, 0.1 to 1.5% by weight of B2O3, 0.1% by weight or less of MgO, 0.01 to 0.2% by weight of CaO, in the case where any one of BaO and SrO is contained, from 0.05 to 3.0% by weight of BaO or 0.01 to 3.0% by weight of SrO, or in the case where both of them are contained, 0.01% by weight or more of SrO and from 0.01% to 3.0% by weight in total of SrO and BaO, 0.1 to 0.7% by weight of SnO2, 0.3% by weight or less of Fe2O3 and TiO2 in total, less than 0.01% by weight of P2O5, and less than 0.01% by weight of CuO.
HIGH ZIRCONIA ELECTRICALLY FUSED CAST REFRACTORY
제조시 및 승온시의 균열이 적어, 생산성이 우수하며, 내화물 단체로도, 지르콘 결정을 생성하기 어려워, 유리 용해로 조업 중 열사이클을 받아도 균열이 발생되기 어려운, 장기간의 내구성을 갖춘 고전기저항 고지르코니아 전기용융 주조 내화물의 제공한다. 화학성분으로서 ZrO가 85∼95중량%이며, AlO가 0.1∼0.8중량% 미만, SiO가 3.5∼10.0중량%, NaO와 KO의 합계가 0.05중량% 미만, BO가 0.1∼1.5중량%, MgO가 0.1 중량% 이하, CaO가 0.01∼0.2중량%, BaO와 SrO에 관해서는, 단독으로 함유하는 경우는, BaO가 0.05∼3.0중량%, 혹은, SrO가 0.01∼3.0중량%, 쌍방 포함하는 경우는, SrO가 0.01중량% 이상이며 SrO와 BaO의 합계가 0.01∼3.0중량%, SnO가 0.1∼0.7중량%, FeO와 TiO의 합계가 0.3중량% 이하, PO가 0.01중량% 미만, CuO가 0.01중량% 미만으로 포함되고, 고온에서의 고전기저항 특성을 가지며, 또, 내화물 단체, 용융 유리와 접촉한 조건에서의 가열이라도 지르콘 결정 생성이나 성장을 현저하게 억제할 수 있는 고지르코니아 전기용융 주조 내화물.
A high zirconia electrically fused cast refractory of high electric resistance having long time durability, less suffering from cracking during production and upon temperature rising, excellent in productivity, less forming zircon crystals even upon heating the refractory in itself and when the refractory is in contact with molten glass, generating less cracks even when undergoing heat cycles during operation of a glass melting furnace is provided. A high zirconia electrically fused cast refractory has, as chemical components, 85 to 95% by weight of ZrO2, 0.1 to less than 0.8% by weight of Al2O3, 3.5 to 10.0% by weight of SiO2, less than 0.05% by weight of Na2O and K2O in total, 0.1 to 1.5% by weight of B2O3, 0.1% by weight or less of MgO, 0.01 to 0.2% by weight of CaO, in the case where any one of BaO and SrO is contained, from 0.05 to 3.0% by weight of BaO or 0.01 to 3.0% by weight of SrO, or in the case where both of them are contained, 0.01% by weight or more of SrO and from 0.01% to 3.0% by weight in total of SrO and BaO, 0.1 to 0.7% by weight of SnO2, 0.3% by weight or less of Fe2O3 and TiO2 in total, less than 0.01% by weight of P2O5, and less than 0.01% by weight of CuO.
HIGH ZIRCONIA ELECTRICALLY FUSED CAST REFRACTORY
고전기저항 고지르코니아 전기용융 주조 내화물
2018-08-17
Patent
Electronic Resource
Korean