Abstract:
A superduty fireclay refractory brick with at least 33 to 43 per cent by weight Al.sub.2 O.sub.3 and 1 to 3 per cent by weight alkali oxide for use as a large-format bottom block in a solder plating bath in furnaces for manufacturing flat glass according to the float technique has a compressive strength of 35 to 60 N/mm.sup.2 and a gas permeability of less than 4 nPm. The brick possesses an open porosity of approx. 20 to 25 per cent by volume, a gas permeability of less than 3 nPm, preferably 0.5 to 2 nPm, and a hydrogen diffusion of less than 150 mm H.sub.2 O, preferably 30 to 100 mm H.sub.2 O.
Abstract translation:一种超级耐火耐火砖,其具有至少33至43重量%的Al 2 O 3和1至3重量%的碱金属氧化物,用作根据浮子制造平板玻璃的炉中的焊接电镀浴中的大型底部块 技术的抗压强度为35〜60N / mm 2,气体渗透性小于4nPm。 砖具有大约的开放孔隙度。 20至25体积%,小于3nPm,优选0.5至2nPm的气体渗透性和小于150mm H 2 O,优选30至100mm H 2 O的氢扩散。
Abstract:
A large format fireclay refractory block for use in a tin bath includes a material including fine grains and large grains. The fine grains have a diameter of less than 0.075 mm and they include more than 65 percent by weight of SiO2 and less than 35 percent by weight of Al2O3. The fine grains include an increased amount by weight of alkali acid and of silicid acid and a decreased amount by weight of Al2O3 for forming a glass phase in the fine grains. The large grains have a diameter of more than 1.500 mm and they include less than 65 percent by weight of SiO2 and more than 35 percent by weight of Al2O3. The block includes a fist surface being made of the material and being adapted for contacting a tin bath. A method of producing such a large format fireclay refractory block includes the steps of preparing the fine grains and the large grains separately, preparing a material by mixing the fine grains and the large grains, forming a block of the material, drying the block, firing the block and grinding the block to its desired dimensions.
Abstract translation:用于锡槽的大型耐火砖耐火块包括细粒和大颗粒的材料。 细晶粒的直径小于0.075mm,它们包括大于65重量%的SiO 2和小于35重量%的Al 2 O 3。 细晶粒包括增加的碱金属和硅酸的重量,并且在细晶粒中形成玻璃相的Al 2 O 3重量减少。 大颗粒具有大于1.500mm的直径,并且它们包括小于65重量%的SiO 2和大于35重量%的Al 2 O 3。 该块包括由该材料制成并适于与锡浴接触的第一表面。 一种制造这种大型耐火砖的方法包括分别制备细晶粒和大晶粒的步骤,通过混合细晶粒和大晶粒来制备材料,形成块体,干燥块,焙烧 块并将块研磨到其期望的尺寸。
Abstract:
A large-format fireclay refractory brick (1), in particular bottom block in a tin bath, made of a material from the system Al.sub.2 O.sub.3--SiO.sub.2, consists of a block (2) having a top surface (3) contacting the tin bath when in use. The top surface (3) of the block (2) is covered with a coating (13) containing alkali silicate in order to form a separating layer on the top surface (3) of the block (2). The separating layer is adapted for glazing and acts as a capturing material for the sodium from the tin bath due to the decreased offer of Al.sub.2 O.sub.3 and the increased offer of alkali and silica in the coating (13) compared with the material of the block (2).
Abstract translation:由系统Al2O3-SiO2制成的大型耐火砖(1),特别是锡槽的底部块,由具有与锡槽接触的顶表面(3)的块(2)组成,块 正在使用。 块(2)的顶表面(3)被含有碱性硅酸盐的涂层(13)覆盖,以在块(2)的顶表面(3)上形成分离层。 分离层适于玻璃化,并且由于Al 2 O 3的降低,并且与块(2)的材料相比,在涂层(13)中提供的碱和二氧化硅的增加提供了来自锡槽的钠的捕获材料 )。
Abstract:
A large-format fireclay refractory brick (1), in particular bottom block for a tin bath, made of material comprising Al.sub.2 O.sub.3 and SiO.sub.2, and having a top surface (3) for contacting the tin bath, is configured to include a phase (13) extending around the periphery of the top surface (3) so that cracking of the top surface edges of abutting bricks lining the tin bath caused by thermal expansion is reduced.
Abstract translation:一种大型耐火砖(1),特别是用于锡浴的底部块,由包含Al 2 O 3和SiO 2的材料制成,并具有用于接触锡槽的顶表面(3),被构造成包括相(13 )围绕顶表面(3)的周边延伸,从而减少了由热膨胀引起的在锡槽内衬的邻接砖的顶表面边缘的破裂。
Abstract:
A fireproof wall intended, in particular, for use in a combustion furnace has a tube wall of tubes connected by webs and a fireproof and fire-tight protective lining which is arranged upstream of the tube wall at a distance therefrom and has a plurality of fireproof plates (tiles) which are arranged alongside and above each other and are fastened to the webs of the tube wall via in each case at least one plate mounting. An intermediate space is present between the tube wall and the protective lining and, at least in certain zones, contains a particulate filler material which increases the transfer of heat between the protective lining and the tube wall. Material selection and the zonal local distribution of the particulate filler material make it possible to deliberately influence the transfer of heat both quantitatively and locally and therefore to optimally adapt it to the respective operating requirements of the combustion furnace.
Abstract:
A large-format fireclay refractory brick for use as bottom block in a tin bath and a method for its manufacture, said brick formed of material of the Al2O3—SiO2 system filling material and opening material. The preferred embodiment of the brick has an upper and a lower layer with the filling and/or opening material contained only in the lower layer. The brick has an open porosity of 20 to 25 percent by volume, a gas permeability of less than 3 nPm and an H2-diffusion of less than 150 mm H2O, resulting in a brick with improved resistance to alkali attack and decreased caloric conductivity.
Abstract translation:用作锡槽底块的大型耐火砖耐火砖及其制造方法,所述砖由Al2O3-SiO2系填充材料和开口材料形成。 砖的优选实施例具有上层和下层,其中填充和/或开口材料仅包含在下层中。 该砖具有20至25体积%的开放孔隙率,小于3nPm的气体渗透性和小于150mm H 2 O的H 2扩散,导致具有改进的耐碱性和耐热导电性的砖。