应用M-MIVM预测含钛渣系组元活度

doi:10.13228/j.boyuan.issn0449-749x.20200110

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Abstract A large number of titanium bearing slag is produced in the process of steel smelting with the application of titanium protecting material and titanium bearing iron ore, while the depth development of titanium resource comprehensive utilization technology is limited due to the lack of thermodynamic data of the multi-component titanium bearing slag system. Using the modified molecular interaction volume model (M-MIVM (FII)), the activity of each component in Al₂O₃-CaO-SiO₂, FeO-MnO-SiO₂, FeO-MnO-TiO₂, FeO-SiO₂-TiO₂, MnO-SiO₂-TiO₂, and Al₂O₃-CaO-FeO-TiO₂ was predicted and compared with the experimental values. The results show that the predicted values of M-MIVM (FII) are in good agreement with the experimental data. The average relative error in activity prediction of the six systems is 11%, which is within the experimental error range of 30% proposed by Turkdogan. M-MIVM (FII) is better than MIVM both in parameter fitting and activity prediction, which has a better prediction effect on the component activity of multi-element titanium bearing slag system. On this basis, M-MIVM (FII) was used to predict the activities of TiO₂ in Al₂O₃-CaO-SiO₂-TiO₂ melt, and the influencing factors were analyzed. The results show that the predicted activities of TiO₂ are in good agreement with the experimental data, and decrease with the increase of slag basicity and Al₂O₃ content, which is consistent with the experimental law. A significant advantage of the M-MIVM(FII) lies in its ability to predict thermodynamic properties of multicomponent melt by only using the component activities or infinite activity coefficients in their sub-binary systems.

Key words： M-MIVM titanium bearing slag TiO₂ activity thermodynamic properties

Received: 17 March 2020

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	Articles by authors
	LIU Zhen-nan
	TAO Dong-ping
	YAO Chun-ling
	LIU Cong
	ZHANG Song-yuan
	HUANG Hui

Cite this article:

LIU Zhen-nan,TAO Dong-ping,YAO Chun-ling等. Prediction of component activity of titanium bearing slag system by M-MIVM[J]. Iron and Steel, 2020, 55(11): 16-29.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20200110 OR http://www.chinamet.cn/Jweb_gt/EN/Y2020/V55/I11/16

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