Study on the parameters of sodium roasting process of titanium slag from Chaoyang area

YAN Jiaqi; ZHAO Liang; DONG Hui; FENG Junsheng

doi:10.7513/j.issn.1004-7638.2025.04.002

Volume 46 Issue 4

Aug. 2025

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YAN Jiaqi, ZHAO Liang, DONG Hui, FENG Junsheng. Study on the parameters of sodium roasting process of titanium slag from Chaoyang area[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(4): 8-17. doi: 10.7513/j.issn.1004-7638.2025.04.002

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YAN Jiaqi, ZHAO Liang, DONG Hui, FENG Junsheng. Study on the parameters of sodium roasting process of titanium slag from Chaoyang area[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(4): 8-17. doi: 10.7513/j.issn.1004-7638.2025.04.002

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Study on the parameters of sodium roasting process of titanium slag from Chaoyang area

doi: 10.7513/j.issn.1004-7638.2025.04.002

1.
School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China
2.
School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, Anhui, China

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Received Date: 2025-01-22
Available Online: 2025-08-31
Publish Date: 2025-08-31

Abstract

Abstract

The paper used a sodium roasting process to improve the quality of titanium slag from Chaoyang area. The controlling steps of the process were analyzed and the activation energy of the reactions between molten sodium carbonate and titanium slag were calculated. The effects of process parameters such as roasting temperature, time, and alkali to slag ratio were also discussed. Kinetic analysis shows that the controlling step of the process is the internal diffusion of reactants through the solid product layer, with a reaction activation energy of 50.13 kJ/mol. The change in Gibbs free energy with temperature indicates that the reactions can occur mostly at temperatures above 900 °C, and the change in conversion rate over time indicates that the reactions are essentially completed after 1 hour. According to the analysis of the effects of various parameters on the roasting process, the optimal process parameters for both impurity removal and cost-effectiveness are determined to be roasting at 900 °C, a sodium carbonate to titanium slag mass ratio of 1.0, and a roasting time of 1.5 hours.
- titanium slag,
- solid waste utilization,
- sodium roasting,
- reaction kinetics,
- synthetic rutile

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References(24)

References

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