Title

EAFD GENERATION – TERMODINAMIC ANALISYS OF Fe-Zn-O-Cl-H-C SYSTEM

EAFD GENERATION – TERMODINAMIC ANALISYS OF Fe-Zn-O-Cl-H-C SYSTEM

Authorship

ANTONIO CEZAR FARIA VILELA; NESTOR CEZAR HECK; PEDRO JORGE WALBURGA KEGLEVICH DE BUZIN

ANTONIO CEZAR FARIA VILELA

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NESTOR CEZAR HECK

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PEDRO JORGE WALBURGA KEGLEVICH DE BUZIN

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DOI

10.5151/1982-9345-24291

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Abstract

The steel production in mini mills generates several process residues, among them there is the electric arc furnace dust (EAFD). This residue has as main elements Fe, O, and Zn, being classified as hazardous by the presence of Pb and Cd. Thermodynamic studies related to the formation of mineral species containing Fe, O and Zn elements were carried on due to the influence of these compounds in hydrometallurgical EAFD recycling processes. In recent years, a rise in the chlorine content of this residue was observed, mainly motivated by the increased use of scrap with polymeric impurities containing this element. In this work, based on computational thermodynamics tool FactSage, a general overview of gaseous and minerals species (found in EAFD) formed by Fe, Zn, O, Cl, H and C is shown – representing the organic origin of chlorine. For this study, the PVC polymer was used as the chlorine carrier substance which contaminates the EAF load.

The steel production in mini mills generates several process residues, among them there is the electric arc furnace dust (EAFD). This residue has as main elements Fe, O, and Zn, being classified as hazardous by the presence of Pb and Cd. Thermodynamic studies related to the formation of mineral species containing Fe, O and Zn elements were carried on due to the influence of these compounds in hydrometallurgical EAFD recycling processes. In recent years, a rise in the chlorine content of this residue was observed, mainly motivated by the increased use of scrap with polymeric impurities containing this element. In this work, based on computational thermodynamics tool FactSage, a general overview of gaseous and minerals species (found in EAFD) formed by Fe, Zn, O, Cl, H and C is shown – representing the organic origin of chlorine. For this study, the PVC polymer was used as the chlorine carrier substance which contaminates the EAF load.

Keywords

EAFD; Fe-Zn-O-Cl-H-C system; Computational thermodynamics

EAFD; Fe-Zn-O-Cl-H-C system; Computational thermodynamics