Oxidation rate of solid iron using an AR-H 2O mixture through CaO-SiO 2-Al 2O 3-FeO Slag

Masahiro Shimizu, Genki Abukawa, Kimihisa Ito

    Research output: Contribution to journalArticle

    Abstract

    The oxidation of solid iron by an Ar-H 2O mixture through a slag layer was measured as a function of slag composition at 1673 K. A convenient and economical hydrogen analysis system was developed. Since the existence of oxygen is required for the sensor to work properly, the sample gas was mixed with oxygen to maintain a constant partial pressure of 0.21 atm before being introduced into the detection cell. The slag samples were prepared by melting a mixture of CaO, FeO, and SiO 2 in an alumina crucible at 1 673 K under an Ar atmosphere for 1 h. A solid iron preform, machined on a lathe for a proper fit, was placed at the bottom of the alumina crucible and 20 g of slag was kept in an electric furnace for 30-40 min to attain slag-metal equilibrium under the 1673 K Ar atmosphere. The Ar-H 2O mixture was then blown onto the slag surface. The partial pressure of water was measured for each Ar flow rate using a gravimetric analysis. The evolution rate increased with an increase in the flow rate and became constant at above 46 cm 3 s -1, where the effect of the gas phase mass transfer was eliminated.

    Original languageEnglish
    Pages (from-to)1497-1499
    Number of pages3
    JournalISIJ International
    Volume52
    Issue number8
    DOIs
    Publication statusPublished - 2012

    Fingerprint

    Slags
    Iron
    Oxidation
    Aluminum Oxide
    Crucibles
    Partial pressure
    Alumina
    Gases
    Flow rate
    Oxygen
    Electric furnaces
    Gravimetric analysis
    Hydrogen
    Melting
    Mass transfer
    Metals
    Water
    Sensors
    Chemical analysis

    Keywords

    • Oxidation of iron
    • Oxygen permeability
    • Slag foaming
    • Steelmaking slag

    ASJC Scopus subject areas

    • Mechanical Engineering
    • Mechanics of Materials
    • Materials Chemistry
    • Metals and Alloys

    Cite this

    Oxidation rate of solid iron using an AR-H 2O mixture through CaO-SiO 2-Al 2O 3-FeO Slag. / Shimizu, Masahiro; Abukawa, Genki; Ito, Kimihisa.

    In: ISIJ International, Vol. 52, No. 8, 2012, p. 1497-1499.

    Research output: Contribution to journalArticle

    Shimizu, Masahiro ; Abukawa, Genki ; Ito, Kimihisa. / Oxidation rate of solid iron using an AR-H 2O mixture through CaO-SiO 2-Al 2O 3-FeO Slag. In: ISIJ International. 2012 ; Vol. 52, No. 8. pp. 1497-1499.
    @article{27e832fbdc9643c499979a27d4f2964c,
    title = "Oxidation rate of solid iron using an AR-H 2O mixture through CaO-SiO 2-Al 2O 3-FeO Slag",
    abstract = "The oxidation of solid iron by an Ar-H 2O mixture through a slag layer was measured as a function of slag composition at 1673 K. A convenient and economical hydrogen analysis system was developed. Since the existence of oxygen is required for the sensor to work properly, the sample gas was mixed with oxygen to maintain a constant partial pressure of 0.21 atm before being introduced into the detection cell. The slag samples were prepared by melting a mixture of CaO, FeO, and SiO 2 in an alumina crucible at 1 673 K under an Ar atmosphere for 1 h. A solid iron preform, machined on a lathe for a proper fit, was placed at the bottom of the alumina crucible and 20 g of slag was kept in an electric furnace for 30-40 min to attain slag-metal equilibrium under the 1673 K Ar atmosphere. The Ar-H 2O mixture was then blown onto the slag surface. The partial pressure of water was measured for each Ar flow rate using a gravimetric analysis. The evolution rate increased with an increase in the flow rate and became constant at above 46 cm 3 s -1, where the effect of the gas phase mass transfer was eliminated.",
    keywords = "Oxidation of iron, Oxygen permeability, Slag foaming, Steelmaking slag",
    author = "Masahiro Shimizu and Genki Abukawa and Kimihisa Ito",
    year = "2012",
    doi = "10.2355/isijinternational.52.1497",
    language = "English",
    volume = "52",
    pages = "1497--1499",
    journal = "ISIJ International",
    issn = "0915-1559",
    publisher = "Iron and Steel Institute of Japan",
    number = "8",

    }

    TY - JOUR

    T1 - Oxidation rate of solid iron using an AR-H 2O mixture through CaO-SiO 2-Al 2O 3-FeO Slag

    AU - Shimizu, Masahiro

    AU - Abukawa, Genki

    AU - Ito, Kimihisa

    PY - 2012

    Y1 - 2012

    N2 - The oxidation of solid iron by an Ar-H 2O mixture through a slag layer was measured as a function of slag composition at 1673 K. A convenient and economical hydrogen analysis system was developed. Since the existence of oxygen is required for the sensor to work properly, the sample gas was mixed with oxygen to maintain a constant partial pressure of 0.21 atm before being introduced into the detection cell. The slag samples were prepared by melting a mixture of CaO, FeO, and SiO 2 in an alumina crucible at 1 673 K under an Ar atmosphere for 1 h. A solid iron preform, machined on a lathe for a proper fit, was placed at the bottom of the alumina crucible and 20 g of slag was kept in an electric furnace for 30-40 min to attain slag-metal equilibrium under the 1673 K Ar atmosphere. The Ar-H 2O mixture was then blown onto the slag surface. The partial pressure of water was measured for each Ar flow rate using a gravimetric analysis. The evolution rate increased with an increase in the flow rate and became constant at above 46 cm 3 s -1, where the effect of the gas phase mass transfer was eliminated.

    AB - The oxidation of solid iron by an Ar-H 2O mixture through a slag layer was measured as a function of slag composition at 1673 K. A convenient and economical hydrogen analysis system was developed. Since the existence of oxygen is required for the sensor to work properly, the sample gas was mixed with oxygen to maintain a constant partial pressure of 0.21 atm before being introduced into the detection cell. The slag samples were prepared by melting a mixture of CaO, FeO, and SiO 2 in an alumina crucible at 1 673 K under an Ar atmosphere for 1 h. A solid iron preform, machined on a lathe for a proper fit, was placed at the bottom of the alumina crucible and 20 g of slag was kept in an electric furnace for 30-40 min to attain slag-metal equilibrium under the 1673 K Ar atmosphere. The Ar-H 2O mixture was then blown onto the slag surface. The partial pressure of water was measured for each Ar flow rate using a gravimetric analysis. The evolution rate increased with an increase in the flow rate and became constant at above 46 cm 3 s -1, where the effect of the gas phase mass transfer was eliminated.

    KW - Oxidation of iron

    KW - Oxygen permeability

    KW - Slag foaming

    KW - Steelmaking slag

    UR - http://www.scopus.com/inward/record.url?scp=84865394987&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84865394987&partnerID=8YFLogxK

    U2 - 10.2355/isijinternational.52.1497

    DO - 10.2355/isijinternational.52.1497

    M3 - Article

    AN - SCOPUS:84865394987

    VL - 52

    SP - 1497

    EP - 1499

    JO - ISIJ International

    JF - ISIJ International

    SN - 0915-1559

    IS - 8

    ER -