Molten steel pouring nozzle

B - Operations – Transporting – 22 – D

Patent

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B22D 41/54 (2006.01)

Patent

CA 2086392

A molten steel pouring nozzle having, along the axis thereof, a bore through which molten steel flows. At least part of an inner portion of the molten steel pouring nozzle, which inner portion forms the bore, is formed of a refractory consisting essentially of: zirconia clinker comprising calcium zirconate : from 40 to 89 wt.%, where, a content of calcium oxide in the zirconia clinker being within a range of from 6 to 35 weight parts relative to 100 weight parts of the zirconia clinker; graphite : from 10 ko 35 wt.%, and crystal stabilized calcium silicate comprising dicalcium silicate (2CaO~SiO2) and tricalcium silicate (3CaO~SiO2) : from 1 to 30 wt.%.

Busette de coulée d'acier en fusion comportant le long de son axe un trou par lequel coule l'acier. Au moins une partie de la portion interne de la busette de coulée, avec le trou intérieur, est formée d'une matière réfractaire constituée essentiellement : de zirconate de calcium, à raison de 40 à 89 % en poids, la teneur en oxyde de calcium dans le clinker de zircone étant de 6 à 35 parties en poids par rapport à 100 parties en poids de clinker de zircone; de graphite, à raison de 10 à 35 % en poids; de silicate de calcium cristallisé stabilisé, composé de silicate dicalcique (2CaO~SiO2) et de silicate tricalcique (3CaO~SiO2), à raison de 1 à 30 % en poids.

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