Chloride capacity in FeO-Fe2O3-SiO2 molten slag at 1523 K

Yu Yamashita, Akio Fuwa, Fumito Tanaka

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    There have been increasing in melting recycled scraps in copper smelting processes, and thus growing interests in the chlorine behavior. In this study, chloride dissolution in FeO-Fe2O3-SiO2 slag (SiO2 sat.) at 1523 K has been measured with varying in P Cl2 from 1.13×10-8 to 1.30×10-7 atm. and the oxygen partial pressures encountered in typical copper smelting furnace, i.e. Po2=10-8 to 10-10 atm. Discussion is made on the chloride capacity of FeO-Fe2O3-SiO 2 slag in terms of its characteristics and the dissolved chlorine species. It has been shown that the most reasonable dissolution reaction and chloride capacity can be expressed by the following reactions, where chlorine dissolves in the form of Cl-; here, ao2-, oxygen ion activity, is shown a function of oxygen partial pressure in the atmosphere. 1/2 Cl2 (g) + 1/2 O2- (slag) = Cl- (slag) + 1/4 O2(g) (1) Ccl- = (mass%Cl-)PO2 1/4/PCl2 1/2 = K1aO2- 1/2/fCl- (2).

    Original languageEnglish
    Title of host publication2006 TMS Fall Extraction and Processing Division: Sohn International Symposium
    Pages503-513
    Number of pages11
    Volume1
    Publication statusPublished - 2006
    Event2006 TMS Fall Extraction and Processing Division: Sohn International Symposium - San Diego, CA
    Duration: 2006 Aug 272006 Aug 31

    Other

    Other2006 TMS Fall Extraction and Processing Division: Sohn International Symposium
    CitySan Diego, CA
    Period06/8/2706/8/31

    Keywords

    • Chloride capacity
    • Copper smelting
    • FeO-FeO-SiO slag
    • Gas-slag equilibrium
    • Scrap smelting

    ASJC Scopus subject areas

    • Engineering(all)

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  • Cite this

    Yamashita, Y., Fuwa, A., & Tanaka, F. (2006). Chloride capacity in FeO-Fe2O3-SiO2 molten slag at 1523 K. In 2006 TMS Fall Extraction and Processing Division: Sohn International Symposium (Vol. 1, pp. 503-513)