Refractory parts for devices for regulation or interruption of a jet of steel, made of refractory material

摘要

The invention relates to a refractory part for a device for regulation or interruption of a jet of steel, characterized in that it is formed from a refractory material essentially consisting of a) 61 to 77% by weight of grains having an alumina content of more than 50% by weight and a melting point higher than 1800 DEG C., and b) 39 to 23% by weight of a binding phase having a X-ray diagram in which the most intense lines are the lines characteristic of a sialon of the formula Si6-zAlzN8-z where z ranges from 2.5 to 4. Application in particular as plate in a slide closing device.