Wear of refractory materials for ceramic filters of different porosity in contact with hot metal

This paper deals with an investigation of the development of refractory materials for the fabrication of ceramic filters for the filtration of steel. Ceramic filters are used for increasing the cleanliness of steel and they must meet several strict requirements, such as the ability to remove impurities, a resistance to sudden changes in temperature, a resistance to corrosion and erosion by metal. The use of filters must not lead to an excessive reduction of the steel’s temperature, as this may lead to solidification of steel and thus to filter clogging. That is why a special refractory material has been developed with reduced thermal capacity caused by increased porosity. Tests were made in a laboratory of the Department of Metallurgy at V[B-TUO in order to simulate the industrial conditions of the filtration of steel with a focus on the evaluation of the erosion and corrosion effects and also on a determination of the resistance and service life of ceramic filters.