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公开(公告)号：US4179046A
公开(公告)日：1979-12-18
申请号：US893690
申请日：1978-04-05
申请人： Peter Jeschke , Gunter Gelsdorf
发明人： Peter Jeschke , Gunter Gelsdorf
CPC分类号： B22D41/32
摘要： A refractory plate for use in slide closures for metallurgical vessels includes a basic plate element adapted to face a liquid metal melt. The basic plate element is formed of a moldable refractory concrete material including 70 to 95% by weight of alumina and 5 to 30% by weight of a cement containing approximately 80% by weight alumina. Alternatively, the 70 to 95% by weight of alumina may be replaced by an alumina-containing raw material containing more than 70% by weight of alumina, for example at least one raw material selected from the group consisting of sintered bauxite, synthetic mullite, corundum, and grinding disk fragments. The basic plate element has embedded therein a ceramic oxide insert having a cold bending strength higher than 300 kp/cm.sup.2, a hot bending strength at 1500.degree. C. higher than 40 kp/cm.sup.2, a cold compressive strength higher than 2000 kp/cm.sup.2, and a permeability to gas lower than 1.0 nanoperm. The basic plate element and the insert have extending therethrough a throughflow opening. The width of the insert, in a direction transverse to the direction of movement of the refractory plate, is from 1.3 to 3.5 times the diameter of the throughflow opening.
摘要翻译： 用于冶金容器的滑动封闭件的耐火板包括适于面对液态金属熔体的基本板元件。 基本板元件由可模制的耐火混凝土材料形成，其包含70至95重量％的氧化铝和5至30重量％的含有约80重量％氧化铝的水泥。 或者，70〜95重量％的氧化铝可以由含有70重量％以上的氧化铝的含氧化铝原料代替，例如选自烧结铝土矿，合成莫来石， 刚玉和磨盘碎片。 碱性板元件内嵌有冷弯曲强度高于300kp / cm 2，高于40kp / cm 2的1500℃的热弯曲强度，高于2000kp / cm 2的冷抗压强度的陶瓷氧化物嵌件， 气体渗透率低于1.0纳米。 基本的板元件和插入件已经穿过其中穿过通孔。 在横向于耐火板的运动方向的方向上，插入件的宽度是通流开口直径的1.3至3.5倍。
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公开(公告)号：US4212926A
公开(公告)日：1980-07-15
申请号：US714196
申请日：1976-08-13
IPC分类号： C04B28/06 , B22D37/00 , B22D41/32 , C04B35/101 , C04B35/105 , C04B35/66 , C04B7/32 , B32B15/04 , C04B7/34 , C04B9/00
CPC分类号： C04B35/6303 , B22D41/32 , C04B35/101 , C04B35/105 , C04B35/66 , C04B41/009 , C04B41/478 , C04B41/82 , C04B2111/00887 , C04B2235/3206 , C04B2235/3217 , C04B2235/3241 , C04B2235/422 , C04B2235/9676 , Y10T428/2993 , Y10T428/31717
摘要： Parts subject to wear, which come into contact with metal melts, are formed with a hydraulically setting high-alumina refractory concrete having a compression strength when cold, measured on dried crude product, of at least 400 kp/cm.sup.2. The compression strength is at least 700 kp/cm.sup.2 after firing at 1400.degree. C. The refractory concrete has a dimensional stability at 1400.degree. C. of at least plus or minus 0.2%. The refractory concrete contains corundum and active alumina as aggregates, an alumina concrete containing less than 22% lime and, as required, a thinning agent. Up to 5% of the aggregates can be replaced by a spinel-forming substance preferably MgO or MgO-yielding compounds; or up to 5% of the aggregates can be replaced by carbon black, pitch or graphite; or up to 7% of the aggregates can be replaced by chromium oxide. Aggregates under 0.5 mm can be present in the refractory concrete as round grains. Preferably, the refractory concrete is used for slide-valve plates and/or base plates of slide-valve closure members on containers containing steel melts. The moulded parts can be impregnated with tar.
摘要翻译： 与金属熔体接触的磨损零件由具有至少400kp / cm 2的在干燥粗产品上测得的冷压缩强度的水硬性高铝耐火混凝土形成。 抗压强度在1400℃焙烧后的压缩强度至少为700kp / cm2。耐火混凝土在1400℃下的尺寸稳定性至少为±0.2％。 耐火混凝土含有刚玉和活性氧化铝作为聚集体，含有少于22％石灰的氧化铝混凝土，以及根据需要的稀释剂。 高达5％的聚集体可由尖晶石形成物质代替，优选MgO或产生MgO的化合物; 或高达5％的聚集体可以被炭黑，沥青或石墨代替; 或高达7％的聚集体可被氧化铬代替。 0.5mm以下的骨料可以作为圆形颗粒存在于耐火混凝土中。 优选地，耐火混凝土用于容纳钢熔体的容器上的滑阀闭合件的滑阀板和/或底板。 模制件可以用焦油浸渍。
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公开(公告)号：US4508504A
公开(公告)日：1985-04-02
申请号：US492001
申请日：1983-05-05
CPC分类号： C21B9/06
摘要： A blast heating apparatus includes an inner metal shell having therein a refractory lining. An outer metal shell surrounds at least a portion of the inner metal shell and defines therewith a double shell structure. Spacers are positioned between the outer and inner metal shells to define therebetween a gap. At least a portion of such gap is filled with a pourable dry material having a grain size of up to 8 mm and a heat conductivity of at least approximately 1.5 W/Km.
摘要翻译： 鼓风加热装置包括其中具有耐火衬里的内金属壳。 外部金属壳围绕内部金属壳体的至少一部分并且由此限定双壳结构。 间隔件定位在外金属壳和内金属壳之间，以在其间限定间隙。 这种间隙的至少一部分填充有可倾斜的干材料，其具有至多8mm的晶粒尺寸和至少约1.5W / Km的热导率。
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公开(公告)号：USRE33700E
公开(公告)日：1991-09-24
申请号：US131165
申请日：1987-12-09
IPC分类号： C04B28/06 , B22D37/00 , B22D41/32 , C04B35/101 , C04B35/105 , C04B35/66
CPC分类号： C04B35/6303 , B22D41/32 , C04B35/101 , C04B35/105 , C04B35/66 , C04B41/009 , C04B41/478 , C04B41/82 , C04B2111/00887 , C04B2235/3206 , C04B2235/3217 , C04B2235/3241 , C04B2235/422 , C04B2235/9676 , Y10T428/2993 , Y10T428/31717
摘要： Parts subject to wear, which come into contact with metal melts, are formed with a hydraulically setting high-alumina refractory concrete having a compression strength when cold, measured on dried crude product, of at least 400 kp/cm.sup.2. The compression strength is at least 700 kp/cm.sup.2 after firing at 1400.degree. C. The refractory concrete has a dimensional stability at 1400.degree. C. of at least plus or minus 0.2%. The refractory concrete contains corundum and active alumina as aggregates, an alumina .[.concrete.]. .Iadd.cement .Iaddend.containing less than 22% lime and, as required, a thinning agent. Up to 5% of the aggregates can be replaced by a spinel-forming substance preferably MgO or MgO-yielding compounds; or up to 5% of the aggregates can be replaced by carbon black, pitch or graphite; or up to 7% of the aggregates can be replaced by chromium oxide. Aggregates under 0.5 mm can be present in the refractory concrete as round grains. Preferably, the refractory concrete is used for slide-valve plates and/or base plates of slide-valve closure members on containers containing steel melts. The moulded parts can be impregnated with tar.
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公开(公告)号：US4829538A
公开(公告)日：1989-05-09
申请号：US711630
申请日：1985-03-14
CPC分类号： F27D11/10 , C21C5/5229 , F27B3/14 , H05B7/06 , Y02P10/216
摘要： A hearth for use in a furnace, which comprises an upper layer of magnesia containing chromic oxide, a lower layer containing graphite and an organic bonding agent, and an intermediate layer of a mixture of the materials forming the upper and lower layers. The hearth is particularly useful in DC arc funaces, in which steel rods embedded in the bottom act as the anode. The hearth has improved service durability.
摘要翻译： 一种用于炉的炉床，其包括含有氧化铬的上层氧化镁，含有石墨的下层和有机粘合剂，以及形成上层和下层的材料的混合物的中间层。 炉底在DC电弧炉中特别有用，其中埋在底部的钢棒充当阳极。 炉膛提高了使用寿命。
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公开(公告)号：US4648097A
公开(公告)日：1987-03-03
申请号：US793289
申请日：1985-10-31
CPC分类号： H05B7/101
摘要： An electrode for an electric arc furnace includes a cooled metal sheath covered with a refractory protective jacket. A plurality of refractory anchors are fixed to the exterior of the sheath, and the anchors are spaced from each other. The protective jacket includes an undercoat on the exterior of the sheath and a protective layer over the undercoat and extending between the anchors. The protective layer is formed of a refractory material such that, at the operating temperature of the electrode, the protective layer has an inner zone which is thermoplastic and an outer zone which is rigid or which is a high-viscosity melting phase.
摘要翻译： 用于电弧炉的电极包括用耐火保护套覆盖的冷却金属护套。 多个耐火锚固件固定在护套的外部，并且锚定件彼此间隔开。 护套包括在护套的外部的底涂层和在底涂层上的保护层，并且在锚固件之间延伸。 保护层由耐火材料形成，使得在电极的工作温度下，保护层具有热塑性的内部区域和刚性的或者是高粘度熔融相的外部区域。
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公开(公告)号：US4174970A
公开(公告)日：1979-11-20
申请号：US901837
申请日：1978-05-01
申请人： Gunter Gelsdorf , Friedhelm Wirth
发明人： Gunter Gelsdorf , Friedhelm Wirth
CPC分类号： C21B7/14
摘要： Improved refractory compositions for the production of blast furnace pouring ducts are realized by the inclusion of Cr.sub.2 O.sub.3 in said compositions.
摘要翻译： 通过在所述组合物中包含Cr 2 O 3来实现用于生产高炉浇注管道的改进的耐火材料组合物。
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