Author/Authors :
Ghani, Ahsan Abdul Department of Chemical Engineering - University of Karachi - Karachi, Pakistan , Saleem, Junaid Department of Chemical Engineering - University of Karachi - Karachi, Pakistan , Hameed, Zeeshan A Department of Quality Assurance - Peoples Steel Mills Ltd - Karachi, Pakistan , Lal, Hira Department of Chemical Engineering - University of Karachi - Karachi, Pakistan , Shoaib, Muhammad Department of Chemical Engineering - University of Karachi - Karachi, Pakistan
Abstract :
During the production of steel from Electric Arc Furnace(EAF), large amount of by-product called EAF flue dust is generated. The major proportion of flue dust is comprised of Zn (41.5 % wt.). Different phases identified by XRD analysis are zincite, franklinite and magnetite with zincite being dominant. In this study, we have performed flue dust treatment using sodium hydroxide as leaching medium. Different concentrations of alkali were used to optimize maximum recovery of Zn. XRF and wet chemical methodswere used to characterize the dust samples both before and after leaching. The optimum alkali concentration for selective leaching of Znwas found to be 4 M with a Znrecovery of 90 %.
Keywords :
EAF dust , Leaching , Sustainable environment , Znrecovery
