2005 Jae Min Yoo Kinetics of the Volatilization Removal of Lead in Electric Arc Furnace Dust matertrans.46.323

The selective removal of lead and chlorine from electric arc furnace (EAF) dust is critical for recovering high purity zinc through high temperature metal recovery (HTMR) processes. This study investigates the volatilization reaction of lead in EAF dust across temperatures ranging from 973 to 1223 K in air. The primary volatilization reaction was established, demonstrating that with a reaction time of 90 minutes at 1223 K, the volatilization ratios for lead and chlorine reached approximately 98%, while zinc loss remained minimal at about 1%. The findings suggest that the volatilization reaction rate of lead is governed by solid-solid diffusion and is characterized by an activation energy of 175 kJ/mol (41.8 kcal/mol). The developed Jander rate expression accurately describes the reaction rate throughout the investigated temperature range, highlighting the efficiency of this process. Overall, the results indicate a promising method for managing EAF dust while minimizing harmful emissions, potentially benefiting environmental and metallurgical practices.