VERBESSERTE VORRICHTUNG ZUR FILTRIERUNG UND VERTEILUNG VON METALLSCHMELZE

摘要

There is provided a filtration and distribution device for a molten metal, which is in the form of a bag having parts made of a solid heat-resistant fabric and open areas made of an open weave heat-resistant fabric. At least some of the parts made of the solid heat-resistant fabric are replaced by rigid parts made of a moldable or thermo-formable composite consisting of an open weave heat-resistant fabric embedded into a matrix made of a heat-resistant inorganic material compatible with the open weave heat-resistant fabric. Preferably, the open weave heat-resistant fabric forming the open areas of the bag, is made of yarns that are rigidified and protected by application thereto of a heat-resistant coating. This coating is preferably made of a heat-resistant inorganic material applied by spraying or dipping after the yarns are weaved. The rigidification can be achieved naturally or by thermal treatment. There is also provided a distribution device for a molten metal, which comprises a hollow body provided with an outlet connectable to a molten metal feed pipe and at least one outlet through which the molten metal fed into the body may escape. This hollow body is made of the very same moldable and thermo-formable composite already mentioned hereinabove.