Thermodynamics and phase relations of the Fe-O-S-Si2(sat) system at 1200 °C and the effect of copper | Zendy

Hua Li | Zendy; W. John Rankin | Zendy

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Thermodynamics and phase relations of the Fe-O-S-Si2(sat) system at 1200 °C and the effect of copper

Author(s) -

Hua Li,

W. John Rankin

Publication year - 1994

Publication title -

metallurgical and materials transactions b

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.84

H-Index - 91

eISSN - 1543-1916

pISSN - 1073-5615

DOI - 10.1007/bf02663181

Subject(s) - copper , solubility , sulfur , oxygen , chemistry , slag (welding) , phase diagram , phase (matter) , inorganic chemistry , mineralogy , metallurgy , materials science , organic chemistry

A laboratory investigation was carried out in which iron was reacted in silica crucibles with an atmosphere of controlled oxygen and sulfur partial pressures. The equilibrium compositions of the melts were determined over the range 10 to 10 atm oxygen and 10 to 10 atm sulfur and it was found that the Fe-O-S-SiO system can exist as either a slag or oxysulfide. The oxysulfide contained appreciable quantities of dissolved oxygen and silica, although the levels decreased as the sulfur content was increased. Sulfur also had the effect of reducing the solubility of silica in the slag. When copper was added to the system, the solubility of oxygen and silica in the oxysulfide phase decreased dramatically. The results are examined in terms of the thermodynamics of the relevant reactions, and the predominance area diagram for the copper-free system was established by combining the present results with those of earlier investigations.

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