Thermodynamic Analysis on the Precipitation of Crystalline Phase from LF Slag during Cooling Process

Abstract:

The precipitation of crystalline phase from LF slag during cooling process was discussed according to the thermodynamic analysis by using CaO-SiO₂-Al₂O₃ system. The results showed that when the slag basicity was low, 2CaO•SiO₂ (C₂S) was precipitated firstly during the cooling process, and then it was followed by 2CaO•Al₂O₃•SiO₂ (C₂AS) and 12CaO•7Al₂O₃ (C₁₂A₇), and the precipitated crystalline phases existed uniformly in the slag. In the case of high basicity slag, 3CaO•SiO₂ (C₃S) and 3CaO•Al₂O₃ (C₃A) with incongruent melting point temperature could be produced, and which would result in a non-uniform distribution in the slag.

• Periodical: Advanced Materials Research (Volume 460)
• Pages: 249-253
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.460.249
• Online since: February 2012
• Authors: Ning Ning Lv, Chang Su, Jin Kun Yu
• Keywords: Precipitation, Slag Phase, Thermodynamic Analysis, Waste Slag

References

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