Mineralogical Transformations in Altasteel Electric Arc Furnace Dust Roasted with Na2CO3 and Secondary Ferrite-Forming Additives
Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=20508#.VNHeUCzQrzE Author(s) P. C. Holloway , T. H. Etsell Affiliation(s) Department of Chemical and Materials Engineering,University of Alberta, Edmonton, Alberta, Canada T6G 2G6 . Department of Chemical and Materials Engineering,University of Alberta, Edmonton, Alberta, Canada T6G 2G6 . ABSTRACT The effect of secondary additives, such as CaCO 3 and MnCO 3 , on the mineralogical transformations in Altasteel EAF dust (9.4% Zn, 31.9% Fe) during roasting with Na 2 CO 3 , and metal extractions during hot water and H 2 SO 4 leaching of the roasted residues, was studied using a combination of techniques, including Design of Experiments testing, x-ray diffraction, scanning electron microscope/energy dispersive xray analysis and chemical analysis. The research objective was to promote the formation of acid insoluble metal ferrites during roasting to try to lower iron ex...