ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Thermodynamics of Phosphorus in CaO-CaF2-SiO2 and CaO-CaF2-CaCl2 Melts Saturated with CaO
Nobuo SanoFumitaka TsukihashiAtsuko Tagaya
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1991 Volume 31 Issue 11 Pages 1345-1347

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Abstract

The phosphate capacities of CaO-CaF2-SiO2 melts saturated with CaO were reexamined by measuring the phosphorus partition ratio between the slag and carbon saturated iron at 1300°C, because the previous data were not compatible with their sulfide capacity values which have been recently measured. New results show a good correlation between the two capacities as the theory predicts.
The influence of replacement of CaF2 by CaCl2 on the phosphate capacity of the CaO saturated CaO-CaF2 melts was also studied by equilibrating the slag and silver at 1400°C. It was confirmed that thermodynamically CaF2 is more effective for dephosphorization than CaCl2.

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© The Iron and Steel Institute of Japan
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