Effect of Reduction Parameters on the Size and Morphology of the Metallic Particles in Carbothermally Reduced Stainless Steel Dust

In this work, we explored the possibility of producing fine near-spherical metallic particles via carbothermal reduction stainless steel dust. For purpose, carbothermally reduced dust under different temperatures and times by using a vertical tube furnace, with special focus on size morphology particles. High temperature long time favored reduction. The was almost completed after 10 min at 1300 °C. obtained 1000 °C 1200 were very irregular. At °C, however, more than half (> 55.0%) became (aspect ratio < 1.5), especially when extending to 30 min. Long reaction greatly promoted growth Both primary M7C3 carbide residual oxides contribute irregularity Chemical composition affected surrounded SiO2-rich much larger MgO-rich oxides.