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  • 1.
    Basu, Somnath
    et al.
    KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap.
    Lahiri, Ashok Kumar
    Seetharaman, Seshadri
    KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Materialens processvetenskap.
    A model for activity coefficient of P2O5 in BOF slag and phosphorus distribution between liquid steel and slag2007Ingår i: ISIJ International, ISSN 0915-1559, E-ISSN 1347-5460, Vol. 47, nr 8, s. 1236-1238Artikel i tidskrift (Refereegranskat)
  • 2.
    Basu, Somnath
    et al.
    KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap.
    Lahiri, Ashok Kumar
    KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap.
    Seetharaman, Seshadri
    KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap.
    Distribution of phosphorus and oxygen between liquid steel and basic oxygen steelmaking slag2009Ingår i: Revue de métallurgie (Imprimé), ISSN 0035-1563, E-ISSN 1156-3141, Vol. 106, nr 1, s. 21-+Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The efficiency of dephosphorisation is governed by the thermodynamic behaviour of phosphorus and oxygen in molten metal, and P2O5 and FeO in slag. The equilibrium distribution of phosphorus and oxygen, for a wide range of chemical compositions simulating the evolution of slag composition during a typical BOF blow, has been experimentally determined. A mathematical model for estimation of the activity coefficients, as a function of the chemical composition, was also attempted.

  • 3.
    Basu, Somnath
    et al.
    KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap.
    Lahiri, Ashok Kumar
    Seetharaman, Seshadri
    KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Materialens processvetenskap.
    Phosphorus partition between liquid steel and CaO-SiO2-FeOx-P2O5-MgO slag containing 15-25 %FeO2007Ingår i: Metallurgical and materials transactions. B, process metallurgy and materials processing science, ISSN 1073-5615, E-ISSN 1543-1916, Vol. 38, nr 4, s. 623-630Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    CaO-SiO2-FeO2-P2O5-MgO bearing slags are typically used in the basic oxygen steelmaking (BOS) process. The partition ratio of phosphorus between slag and steel is an index of the phosphorus holding capacity of the slag, which determines the phosphorus content achievable in the finished steel. The influence of factors such as FeO content and basicity on the phosphorus partition ratio was investigated at two different temperatures. The partition ratio initially increased with basicity but remained constant beyond a basicity of 2.5 to 2.6. An increase in the FeO content up to 18 to 20 mass pct was beneficial for the phosphorus partition at a basicity level of 2 to 3, but a higher concentration of FeO resulted in a decrease in the phosphorus partition ratio; the FeO concentration corresponding to this transition varied with basicity and temperature. At even lower basicities, however, the equilibrium phosphorus partition showed either no change, or a marginally decreasing trend, with an increase in the FeO content.

  • 4.
    Basu, Somnath
    et al.
    KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap.
    Lahiri, Ashok Kumar
    KTH.
    Seetharaman, Seshadri
    KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Materialens processvetenskap.
    Phosphorus partition between liquid steel and CaO-SiO2-P2O5-MgO slag containing low FeO2007Ingår i: Metallurgical and materials transactions. B, process metallurgy and materials processing science, ISSN 1073-5615, E-ISSN 1543-1916, Vol. 38, nr 3, s. 357-366Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    CaO-SiO2-FeOx-P2O5-MgO bearing slags are typical in the basic oxygen steelmaking (BOS) process. The partition ratio of phosphorus between slag and steel is an index of the phosphorus holding capacity of the slag, which determines the phosphorus content achievable in the finished steel. The influences of FeO concentration and basicity on the equilibrium phosphorus partition ratios were experimentally determined at temperatures of 1873 and 1923 K, for conditions of MgO saturation. The partition ratio initially increased with basicity but attained a constant value beyond basicity of 2.5. An increase in FeO concentration up to approximately 13 to 14 mass pet was beneficial for phosphorus partition.

  • 5.
    Basu, Somnath
    et al.
    KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap.
    Lahiri, Ashok Kumar
    KTH.
    Seetharaman, Seshadri
    KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Materialens processvetenskap.
    Halder, Jayanta
    Change in phosphorus partition during blowing in a commercial BOF2007Ingår i: ISIJ International, ISSN 0915-1559, E-ISSN 1347-5460, Vol. 47, nr 5, s. 766-768Artikel i tidskrift (Refereegranskat)
  • 6.
    Shankar, Amitabh
    et al.
    KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap.
    Görnerup, Mårten
    KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap.
    Lahiri, Ashok Kumar
    KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap.
    Seetharaman, Seshadri
    KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap.
    Estimation of viscosties of high alumina blast furnace slagsIngår i: Ironmaking & steelmaking, ISSN 0301-9233, E-ISSN 1743-2812Artikel i tidskrift (Refereegranskat)
  • 7.
    Shankar, Amitabh
    et al.
    Research and Development, Tata Steel, Jamshedpur.
    Görnerup, Mårten
    KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap.
    Lahiri, Ashok Kumar
    Department of Metallurgy, Indian Institute of Science, Bangalore.
    Seetharaman, Seshadri
    KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap.
    Sulfide capacity of high alumina blast furnace slags2006Ingår i: Metallurgical and materials transactions. B, process metallurgy and materials processing science, ISSN 1073-5615, E-ISSN 1543-1916, Vol. 37, nr 6, s. 941-947Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Sulfide capacities of high alumina blast furnace slags were experimentally determined using the gas-slag equilibration technique. Two different slag systems were considered for the current study, namely, CaO-SiO2-MgO-Al2O3 quaternary and CaO-SiO2-MgO-Al2O3-TiO2 quinary system. The liquid slag was equilibrated with the Ar-CO-CO2-SO2 gas mixture. Experiments were conducted in the temperature range of 1773 to 1873 K. The effects of temperature, basicity, and the MgO and TiO2 contents of slags on sulfide capacity were studied. As expected, sulfide capacity was found to increase with the increase in temperature and basicity. At the higher experimental temperature, titania decreases the sulfide capacity of slag. However, at the lower temperature, there was no significant effect of titania on the sulfide capacity of slag. Sulfide capacity increases with the increase in MgO content of slag if the MgO content is more than 5 pct.

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