There has been a growing environmental and economic concern about the final destination of industrial waste. This paper aims to evaluate the effect of incorporating iron ore tailing and steel slag on red ceramic bricks. The procedure for producing the fired bricks includes forming the bricks by compressing them into a mold under a specified pressure, and calcination (950 oC). In this study, the influence of high substitution (50%) of clay with IOT and BOF slag are investigated using flexural strength and scanning electron microscope (SEM). To the clay mass different proportions of residues were added, being: 25% of slag and 25% of tailing in T25.I25; 50% slag and 0% tailing at T50.I0; 0% slag and 50% tailing at T0.I50; 35% slag and 15% tailing in T35.I15; and, 15% of slag and 35% of tailing in T15.I35. Results show that IOT and BOF slag can be used together to produce fired clay brick with high level substitution, however some adjustments are required depending on the final application. This study contributes to the valorization of the waste, contributing to the planning and management of waste based on sustainability principles and aiming at reducing greenhouse gas emissions. Keywords: Red clay, Tailing, Waste, Sustainability