公开(公告)号：EP4253347A1

公开(公告)日：2023-10-04

申请号：EP21897994.6

申请日：2021-11-24

申请人： Saint-Gobain TM K.K.

发明人： SUGIYAMA, Hiroshi ,  MISU, Yasuo ,  HASHIMOTO, Itaru

IPC分类号： C04B35/484 ,  C03B5/43

摘要： An object of the present invention is to provide a high zirconia electrically-fused cast refractory containing more than 95% by mass of ZrO 2 , which is less likely to be cracked at the time of production, has excellent corrosion resistance against molten glass, can suppress the formation of zircon crystals when heated alone or heated in contact with molten glass, and is easily mass-produced industrially; the present invention relates to a high zirconia electrically-fused cast refractory, comprising, as a chemical composition, more than 95 % by mass and 98 % by mass or less of ZrO 2 , 0.1 to 1.5 % by mass of Al 2 O 3 , 1 to 2.5 % by mass of SiO 2 , 0 to 0.1 % by mass of K 2 O, 0.01 to 0.3 % by mass of Na 2 O and K 2 O in total, 0.02 to 0.4 % by mass of B 2 O 3 , 0.01 to 0.6 % by mass of BaO, 0.01 to 0.4 % by mass of SnO 2 , 0.3 % by mass or less of Fe 2 O 3 and TiO 2 in total, and 0.04 % by mass or less of P 2 O 5 , wherein the contents of B 2 O 3 and SnO 2 satisfy the following Formulas (1) and (2):

        0.20 ≤ (SnO 2 /B 2 O 3 )

        0.14 % by mass ≤ (C SnO2 +C B2O3 /2) ≤ 0.55 % by mass     (2)

(in Formula (2), C SnO2 represents the content of SnO 2 , and C B2O3 represents the content of B 2 O 3 , expressed in % by mass in the refractory.).

公开(公告)号：EP3932889A1

公开(公告)日：2022-01-05

申请号：EP19916767.7

申请日：2019-08-13

申请人： Saint-Gobain TM K.K.

发明人： ABE, Koya ,  SUGIYAMA, Hiroshi ,  TSUCHIYA, Shinji ,  HASHIMOTO, Itaru ,  MISU, Yasuo

IPC分类号： C04B35/107 ,  C03B5/43 ,  F27D1/00

摘要： The present invention provides a high alumina fused cast refractory that is easily produced and has low porosity and high corrosion resistance, and a method of producing the same. The high alumina fused cast refractory of the present invention has the following chemical composition: 95.0 mass% to 99.5 mass% Al 2 O 3 , 0.20 mass% to 1.50 mass% SiO 2 , 0.05 mass% to 1.50 mass% B 2 O 3 , 0.05 mass% to 1.20 mass% MgO and balance. The method of producing the high alumina fused cast refractory of the present invention includes obtaining a mixture by mixing an Al 2 O 3 source material, a SiO 2 source material, a B 2 O 3 source material and an MgO source material, and fusing the mixture.

公开(公告)号：EP3253725A1

公开(公告)日：2017-12-13

申请号：EP15881134.9

申请日：2015-03-02

申请人： Saint-Gobain TM K.K.

发明人： SUGIYAMA, Hiroshi ,  KUBOKI, Toshimitsu ,  HASHIMOTO, Itaru ,  MISU, Yasuo

IPC分类号： C04B35/657 ,  C03B5/43 ,  C04B35/484

CPC分类号： C04B35/484 ,  C03B5/02 ,  C03B5/43 ,  C04B2235/3201 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3225 ,  C04B2235/3244 ,  C04B2235/3272 ,  C04B2235/3281 ,  C04B2235/3293 ,  C04B2235/34 ,  C04B2235/3409 ,  C04B2235/3418 ,  C04B2235/72 ,  C04B2235/727 ,  C04B2235/9607 ,  C04B2235/9669

摘要： 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.