Influence of BaO on viscosity and structure of CaO–SiO₂–Fe_tO–Al₂O₃–BaO steel slag

ABSTRACT

The viscosity of steel slag has an important influence on phosphorus mass transfer in dephosphorization process and slagging–off after dephosphorization. In current work, the viscosity of steel slag was measured and the influence of BaO on viscosity and structure evolution of steel slag was studied. The results showed that the viscosity of steel slag decreased with the addition of BaO. The Fourier transform infrared spectroscopy (FTIR) analysis showed that the degree of polymerisation (DOP) of steel slag is reduced by the addition of BaO. The Raman spectra quantitative analysis revealed that the convertion of Q² and Q³ to Q⁰ and Q¹ was promoted by the addition of BaO. The X–ray photoelectron spectroscopy (XPS) analysis indicated that the general relative fraction quantity of O⁰ decreased and that of O²⁻ increased with the addition of BaO. The above analysis are agree well with the results of viscosity measurement.

KEYWORDS:

• BaO
• Al₂O₃
• viscosity
• structure evolution
• degree of polymerisation
• deconvoluted
• convertion
• molten slag

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The work was supported by the National Nature Science Foundation of China (No.52293392).