Glassification of electric arc furnace dust by using fly ash or bagasse ash
Keywords:EAF dust, Zinc ferrite, Fly ash, Bagasse ash, Treatment
AbstractElectric arc furnace (EAF) dusts contain significant quantities of iron and zinc found almost entirely as iron oxide, zinc oxide and zinc ferrite. The dust has been classified as a hazardous waste due to the relative high lead, cadmium and hexavalent chromium contents. An option for treating EAF dust with an economic and uncomplicated process is by using ashes. Silica in ashes has the ability to incorporate a variety of elements in a nonleachable form in the dust. In this study, the EAF dust was mixed with fly ash or bagasse ash in several ratios. All mixed samples were heated to 1500Â°C in the muffle furnace and held for 120 minutes and then were examined by XRD and SEM-EDS. It was found that all mixed samples are incorporated into an amorphous glassy structure. In silica-based glassy structures with silica levels of more than 50 wt%, iron and zinc in the EAF dust are incorporated as zinc ferrite in the form of spherical particles on glassy structures.
Sukonthanit, S. 1998. Zinc metal recovery from electric arc furnace dust. Master’s Thesis. Department of Metallurgical Engineering, Chulalongkorn University, Thailand : 6-7.
Polsilapa, S., Sadedin, D. R., Kyllo, A. K., Gray, N. B. and Swinbourne, D.R. 2003. Zinc and Iron recovery from EAF dust by hydrogen reduction. Proceedings of International Solid Waste Association (ISWA) 2003 World Congress. Melbourne, Australia. 9-14 November. Proceedings as CD.
Mager, K., Meurer, U., Garcia-Egocheaga, B., Goicoechea, N., Rutten, J., Saage, W. and Simonetti, F. 2000. Recovery of zinc oxide from secondary raw materials : New development of the Waelz Process. In : Stewart, D. L., Stephens, R. and Daley, J. C. (eds.), Fourth International Symposium on Recycling of Metals and Engineering Materials. (Pennsylvania : TMS-AIME) : 329-344.
Mohai, I., Szepvolguyi, J., Karoly, Z., Mohai, M., Toth, M., Babievskaya, I. Z. and Krenev, V. A. 2001. Reduction of Metallurgical wastes in an RF thermal plasma reactor. Plasma chem. plasma process. 21(4) : 547-563.
Antrekowitsch, H., Antrekowitsch, J. and Gelder. S. 2003. Investigations in different reducing agents for the pyro-metallurgical treatment of steel mill dusts. Yazawa International Symposium. (Pennsylvania: TMS-AIME). 1 : 539-549.
Robertson, D. G. C., Panda, D. K. and Deneys, A. C. 2003. The chemistry of fuming zinc from oxide slags using coke. Yazawa International Symposium. (Pennsylvania: TMS-AIME). 1 : 647-657.
Fernandez-Pereira, C., Galiano, Y. L., Rodriguez-Pinero, M. A., Vale, J. and Querol, X. 2002. Utilisation of zeolitised coal fly ash as immobilizing agent of a metallurgical waste. J. Chem. Technol. Biotechnol. 77 : 305-310.
Ionescu, D., Meadowcroft, T. R. and Barr, R. V. 1997. Glassification of EAF Dust : The limits for Fe2O3 and ZnO content and an assessment of leach performance. Can. Metall. Q. 36(4) : 269-281.
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