STUDY ON CHANGES IN PORE SIZE ON SINGLE POWDER AND REDUCTION SWELLING INDEX DURING THE REDUCTION OF IRON MILL SCALE WITH HYDROGEN AND FORMING GAS

In this research study, we examined the impact of hydrogen content, temperature, and reaction time in reducing the mill scale and porosity formation on a single powder. Reduction reactions were carried out at temperatures ranging from 700°C to 1000°C under hydrogen and forming gas (80 vol% N<sub>2</sub>/20 vol% H<sub>2</sub>). The utilization of hydrogen as a reducing agent has been identified as leading embrittlement and the creation of porous configurations. In this study, we examined the porosity structures on the single powder formed during the reduction of iron oxides using two different reducing gases. The results indicated an increase in the degree of reduction and porosity size on the single powder with increasing temperature for both hydrogen and hydrogen/nitrogen mixtures.