REFRACTORY PRODUCT EXCELLENT IN RESISTANCE TO EROSION OF SLAG

摘要

PROBLEM TO BE SOLVED: To obtain an oxide-based refractory product excellent in resistance to erosion of molten slag by including an Al₂O₃-SiC-based mixture synthesized from an alumina-silica-based mineral into an oxide-based refractory material. ;SOLUTION: This oxide-based refractory product is obtained by adding 1-20 wt.% (1.0-10 wt.% expressed in terms of SiC amount) Al₂O₃-SiC-based mixture, synthesized by carbon heat-reduction method from a natural alumina-silica-based refractory mineral, being superfine powder, comprising uniform mixture of Al₂O₃ with SiC and preferably containing ≥30 wt.% Al₂O₃ to an oxide refractory material consisting mainly of electromelting alumina, sintered alumina, electromelting magnesia, sintered magnesia, electromelting spinel, sintered spinel, eletromelting mullite and sintered mullite. When the mixture of Al₂O₃ with SiC is brought into contact with liquid slag during use of the refractory product, Al₂O₃ is dissolved in the slag and simultaneously SiC is dissolved in the slag. Thereby, viscosity of the slag is increased and erosion of the slag is prevented.;COPYRIGHT: (C)1999,JPO