Research on Calculating Activities from Binary Phase Diagrams of Ti-Bearing Blast Furnace Slag

Chunling Yao; Zhennan Liu; Cong Liu; Ying Sun; Yadong Li

doi:10.54097/hset.v58i.9964

Authors

Chunling Yao
Zhennan Liu
Cong Liu
Ying Sun
Yadong Li

DOI:

https://doi.org/10.54097/hset.v58i.9964

Keywords:

Ti-bearing blast furnace slag, binary phase diagram, activity calculation.

Abstract

Based on Kuo-chih Chou formulae of calculating activities from binary phase diagrams, some methods are proposed to improve numerical integration for the formulae. The component activity data of CaO-SiO₂, MgO-SiO₂ and MnO-TiO₂ melts are calculated by the methods under the condition of regular solution’s assumption. The calculation results are in reasonable agreement with experimental data, and the average relative errors between calculated values by using the methods and experimental data are 18%, 18% and 11% respectively. This accuracy is within experimental error range of 10%~30% that Turkdogan proposed. The results show that the new methods are feasible in the practical application. Accordingly, the component activity data of CaO-TiO₂, Al₂O₃-TiO₂, SiO₂-TiO₂ and MgO-TiO₂melts at a given temperature and concentration are calculated by the proposed methods. The relative errors for these systems are comparable to the results of CaO-SiO₂, MgO-SiO₂and MnO-TiO₂ systems. So the activity data obtained can be used as basic data for thermodynamic study of Ti-bearing blast furnace slag.

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