In this paper,we began a study of the substitution of brown corundum dust collection powder to the Al2O3≥85% special grade bauxite in refractory.Firstly,the chemical analysis,the grain size analysis,XRD,SEM and EDS of Z1,Z2 and 85 bauxite were comprehensively compared.Then experiments were done to replace of bauxite with dust Z1 and Z2 in the LMG (alumina-magnesia castable).The results confirmed that there are no big differences in the major chemical composition,main phase,particle size distribution between brown corundum dust collection powder and the Al2O3≥85% special grade bauxite.However,morphology of particles and impurity component have some changes.Also,there is no more difference in physical performance at room temperature between the LMG with brown corundum dust and that with the Al2O3≥85% bauxite.Moreover,the above two samples have the similar properties in thermal shock resistance and resistance to slag corrosion.

"> Brown corundum collection powder, Al2O3≥85% special grade bauxite, Alumina-magnesia castable, Recovery and utilization, Physical performance at room temperature, Thermal shock resistance, Resistance to slag corrosion