Closing plate and sliding closure on the spout of a...

B - Operations – Transporting – 22 – D

Patent

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Details

B22D 41/24 (2006.01) B22D 41/28 (2006.01)

Patent

CA 2721597

A closing plate for a sliding closure on the spout of a receptacle for molten metal, especially of a converter, comprises an elongate refractory plate (11) and a sheet metal jacket (12) surrounding the same. The refractory plate (11) has a sli-ding surface (14, 16) which can be braced with a sliding surface of a refractory closure plate interacting therewith or with a sliding surface (21') of a refractory head part (21). The refractory plate (11) has a tapering section (26, 28, 29) which forms an angle (.alpha.) with the sliding surface (14, 15) on at least one side delimiting the sliding surface (14, 15), said tapering section being associated with a section of the refractory plate (11) that projects beyond the sheet metal jacket (12). The closing plate according to the in-vention allows the risk of damage to the front faces of the refractory parts to be braced with each other to be substantially reduced during bracing of the parts with each other and/or during a relative adjustment of the refractory parts that are braced with each other.

L'invention concerne une plaque d'obturation pour un obturateur à tiroir à l'ouverture de coulée d'un récipient pour bain métallique, en particulier un convertisseur, ladite plaque comprenant une plaque réfractaire (11) allongée et un revêtement métallique (12) placé sur le tour de cette dernière. La plaque réfractaire (11) comporte une surface de coulissement (14, 15) qui peut être serrée contre la surface de coulissement d'une plaque d'obturation réfractaire avec laquelle elle coopère, ou contre la surface de coulissement (21') d'une garniture d'extrémité réfractaire (21). La plaque réfractaire (11) comporte sur au moins un côté (16, 17, 18, 19) délimitant la surface de coulissement (14, 15), une partie inclinée (26, 28, 29) contenant un angle (a), et faisant partie d'une zone de la plaque réfractaire (11) déplassant du revêtement métallique (12). La plaque d'obturation selon l'invention permet de réduire de manière importante le risque d'endommagement des faces de travail des éléments réfractaires devant être serrées l'une contre l'autre lors de l'introduction de la pression de serrage et/ou pendant le déplacement relatif des éléments réfractaires serrés l'un contre l'autre.

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