Development of a cleaner technology for obtaining ZnO from wastes generated in steel manufacturing
Keywords:Wastes, Electric arc furnace dusts, Waelz process, Reducing roasting
In Spain the company ASER, S.A. is currently treating electric arc furnace dust (EAFD) in order to recover its ZnO content. Several alternatives are studied for improving the obtainment of ZnO by the Waelz process, paying attention to the preparation of the charge before the reducing process. Agglomeration of the EAFD in pellet form is a fundamental alternative, and consideration is also made of washing the EAFD in order to remove chlorides, fluorides and alkalines. Good results are obtained in the heat treatment of the EAFD in pellet form with and without incorporated reducing agent. A study is made of zinc volatilization, controlling the reducing time and temperature. After the reducing process, metallic iron enriched pellets are obtained which contain fluxing elements susceptible to recycling in the EAF.
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How to Cite
García-Carcedo, F., Ayala, N., Hernández, A., Palacios, M. A., García, E., Goicoechea, N., & Dañobeitia, I. (1998). Development of a cleaner technology for obtaining ZnO from wastes generated in steel manufacturing. Revista De Metalurgia, 34(Extra), 432–435. https://doi.org/10.3989/revmetalm.1998.v34.iExtra.787
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