Abstract:
A gas injected upper tundish nozzle comprising: a protective can; a ceramic inner portion disposed within said protective can, said ceramic inner portion having gas flow pathways therein; a gas injection port attached to said protective can allowing for the injection of gas through the protective can and into the gas flow pathways within the ceramic inner portion. A gas flow seal is formed between the protective can and the ceramic inner portion. The gas flow seal blocks gas leakage from the gap between the protective can and the ceramic inner portion. The gas flow seal is formed of nickel or an alloy of nickel.
Abstract:
본 발명에 따른 노즐은 용강이 이동할 수 있는 내공부를 갖고, 용강이 상기 내공부의 외측으로 이동할 수 있는 토출구가 형성되는 노즐 몸체 및 산화칼슘(CaO) 안정화 지르코니아(CSZ) 및 상기 산화칼슘(CaO) 안정화 지르코니아(CSZ)의 소결을 유도하는 소결 첨가제를 포함하는 원료로 제조되어, 노즐 몸체의 내벽의 적어도 일부를 둘러싸도록 설치된 라이너를 포함한다. 따라서, 본 발명의 실시형태들에 의하면, 고체 전해질에 소결 첨가제를 이용하여 라이너로 제조함으로써, 고체 전해질의 소결을 유도함에 따라, 산소 이온 전도도의 저하를 방지 또는 산소 이온 전도도를 종래에 비해 향상시킬 수 있다. 또한, 본 발명의 실시형태들에 따른 라이너 제조용 원료에 흑연(C)이 포함되지 않으므로, 내벽면에 산화 방지제를 도포할 필요가 없다. 따라서, 산화 방지제의 에 의해 산소 이온 전도도가 저하되는 문제가 발생되는 것을 방지할 수 있다.
Abstract:
Gegenstand der Erfindung ist ein einen flüssigphasengesinterter Werkstoff auf Basis von Siliziumnitrid sowie die Verwendung des Werkstoffes in der Gießereitechnik, insbesondere der Gießerei von Nichteisenmetallen, beispielsweise Edelmetallen, Leichtmetallen, Schwermetallen, Halbmetallen oder Legierungen aus diesen Metallen. Der Werkstoff enthält bevorzugt eine amorphe Korngrenzphase und hat eine Enddichte größer 90 %.
Abstract:
An inductively heated drain tube fashioned of high temperature, electrically conducting materials is disclosed. An inductor (11) surrounds the drain tube (12). The inductor and drain tube are cast within a refractory material (14). The drain tube is then placed in communication with the side of a bath of molten materials. When power is supplied to the inductor, the inductor couples with the drain tube, heating the drain tube and allowing it to act as a drain for high temperature molten materials (13). When power is removed from the inductor, a flow of cooling liquid through the inductor cools the drain tube, solidifying the molten materials and stopping their flow through the drain tube. The refractory material encases the inductor, acting as a thermal barrier and preventing damage from molten materials.
Abstract:
An article (1), for example a nozzle or shroud, or a stopper rod, for use with molten metal, especially molten steel, comprising a body (3) formed from carbon-bonded refractory material (4), a surface layer (15) of the body being porous, the porous surface layer having a coating of glaze (17).
Abstract:
A basic refractory ceramic hollow body for use in metallurgy, characterized by the following characteristics: a) the hollow body is monolithically created from a material; b) the material is based on a mixture of 10-40 mass per cent of carbon, 50-89 mass per cent of MgO, 1-35 mass percent of other constituents; c) the hollow body has an open pore volume of between 5 and 20 volume per cent with a substantially constant proportion of pores ranging from 0.1-15 DEG m.
Abstract:
A molten steel pouring nozzle (10) having a bore (22) therethrough, at least a portion (26) of the nozzle (10) forming the bore (22) being comprised of a refractory having calcium zirconate: from 20 to 75 weight %, graphite: from 5 to 30 weight %, and calcium silicide: from 0.5 to 15 weight %.