Paper Title
Innovative Processes For Zinc Oxide Recovery From Electric Arc Furnace Dust

Abstract
Electric arc furnace (EAF) dust, iron scale, and eggshell are by products from steel making and food industries respectively.EAF dust is generated from steel making process and normally collected in the bag house filter during steel scrap smelting. Zinc ferrite (ZnFe2O4) is the main compound mostly found in EAF dust. It is a very stable compound led to difficult extraction of zinc. Innovative processes used to decompose zinc ferrite by using byproducts obtained from steel deformation and food industries were investigated in this study. Iron powder (for iron scale), lime and eggshell were materials selected as reducing agents to transform zinc ferrite to zinc oxide using low temperature pyrometallurgical processes. The EAF dust was mixed with each of the reducing agents and the effects of the molar ratio of zinc ferrite in EAF dust to each ofthe reducing agents, temperature and time on the decomposition were studied. It was found that 70% of zinc ferrite decomposition could be obtained at temperature as low as 600oC for 2 hours and a molar ratio of zinc ferrite in EAF dust to iron powder of 1:3. The significant recovery of 80% of zinc ferrite decompositionalso could be achieved by lime and eggshell as reducing agents with the similar conditions of 800oC to900oCdecomposition temperatures for 2 hours and a molar ratio of zinc ferrite in EAF dust to calcium oxide in lime or eggshell of 1:2. Iron scale and eggshell have performed the potential materials to be the reducing agentsin these innovative processes to transform zinc ferrite in EAF dust to be zinc oxide. Keywords - Innovative Process, Zinc Oxide, Recovery, Electric Arc Furnace Dust