Thermodynamic analysis of the effect of oxygenation on the low-temperature chlorination selectivity of carbonized slag

Yue Dong; Wen Liangying; Chen Rong; Wang Jianxin; Yang Yangjun

doi:10.7513/j.issn.1004-7638.2023.05.009

Volume 44 Issue 5

Oct. 2023

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Yue Dong, Wen Liangying, Chen Rong, Wang Jianxin, Yang Yangjun. Thermodynamic analysis of the effect of oxygenation on the low-temperature chlorination selectivity of carbonized slag[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(5): 53-60. doi: 10.7513/j.issn.1004-7638.2023.05.009

Citation:

Yue Dong, Wen Liangying, Chen Rong, Wang Jianxin, Yang Yangjun. Thermodynamic analysis of the effect of oxygenation on the low-temperature chlorination selectivity of carbonized slag[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(5): 53-60. doi: 10.7513/j.issn.1004-7638.2023.05.009

Citation:

Yue Dong, Wen Liangying, Chen Rong, Wang Jianxin, Yang Yangjun. Thermodynamic analysis of the effect of oxygenation on the low-temperature chlorination selectivity of carbonized slag[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(5): 53-60. doi: 10.7513/j.issn.1004-7638.2023.05.009

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Thermodynamic analysis of the effect of oxygenation on the low-temperature chlorination selectivity of carbonized slag

doi: 10.7513/j.issn.1004-7638.2023.05.009

1.
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
2.
Pangang Group Panzhihua Iron and Steel Research Institute Co., Ltd., Panzhihua 617000, Sichuan, China

Received Date: 2023-08-11
Available Online: 2023-11-04
Publish Date: 2023-10-31

Abstract

Abstract

Based on the Factsage thermodynamic software and database, the effects of introducing oxygen on the TiC and calcium magnesium oxide chlorination in titanium carbide slag are analyzed, and the regulatory scheme of adding oxygen to selectively enhance the chlorination reaction of TiC in the slag while reducing or inhibiting the chlorination reaction of calcium and magnesium oxides are studied. The results show that the oxygenated low-temperature chlorination can promote the chlorination process and increase the chlorination rate of TiC in the slag. When the low-temperature chlorination reaction temperature is 500 ℃ and the molar ratio of Cl₂/TiC is 1.80～3.50, MgO does not chlorinate, and the introduction of oxygen can inhibit the CaO chlorination reaction and reduce the CaO chlorination rate. When the molar ratio of chlorine-oxygen gas is 4.00:1.00, and the mass fraction of TiC with chlorination reaction in carbonization slag is reduced to 4.02%, the chlorinated gas can be switched to a mixture of chlorine gas and nitrogen gas to further chlorinate the residual TiC in the slag to less than 2.50%. Compared with direct chlorination without adding oxygen, the total chlorine consumption can be reduced by 25.69% and the total chlorination rate of CaO can be reduced by 37.74%.
- carbonized titanium slag,
- oxychlorination,
- low temperature chlorination,
- selectivity,
- thermodynamic analysis

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References(11)

References

[1]	Ahmadi E, Rezan S A, Baharun N, et al. Chlorination kinetics of titanium nitride for production of titanium tetrachloride from nitrided ilmenite[J]. Metallurgical and Materials Transactions B, 2017,48(5):2354−2366. doi: 10.1007/s11663-017-1011-z
[2]	Yang F, Wen L Y, Yue D, et al. Study on reaction behaviors and mechanisms of rutile TiO₂ with different carbon addition in fluidized chlorination[J]. Journal of Materials Research and Technology, 2022,18:1205−1217. doi: 10.1016/j.jmrt.2022.02.131
[3]	Zhu F X, Qiu K H, Sun Z H. Preparation of titanium from TiCl₄ in a molten fluoride-chloride salt[J]. Electrochemistry, 2017,85(11):715−720. doi: 10.5796/electrochemistry.85.715
[4]	Shi J J, Qiu Y C, Yu B, et al. Titanium extraction from titania-bearing blast furnace slag: A review[J]. American Journal of Respiratory and Critical Care Medicine, 2022,74(2):654−667.
[5]	Qin J, Wang Y, You Z X, et al. Carbonization and nitridation of vanadium–bearing titanomagnetite during carbothermal reduction with coal[J]. Journal of Materials Research and Technology, 2020,9(3):4272−4282. doi: 10.1016/j.jmrt.2020.02.053
[6]	Peng Yi. Thermodynamic analysis on the selective chlorination of carbonized Pangang BF slag at low temperature[J]. Titanium Industry Progress, 2005,6:45−49. (彭毅. 碳化攀钢高炉渣低温选择氯化的热力学分析[J]. 钛工业进展, 2005,6:45−49. doi: 10.3969/j.issn.1009-9964.2005.01.013 Peng Yi. Thermodynamic analysis on the selective chlorination of carbonized Pangang BF slag at low temperature [J]. Titanium Industry Progress, 2005, 6: 45-49. doi: 10.3969/j.issn.1009-9964.2005.01.013
[7]	刘晓华. 改性含钛高炉渣高温碳化低温氯化的研究[D]. 沈阳: 东北大学, 2009. Liu Xiaohua. Study on high-temperature carbonization and low-temperature chlorination on modified titanium bearing blast furnace slag[D]. Shengyang: Northeastern University, 2009.
[8]	Taki T, Komoto S, Otomura K, et al. Chloride pyrometallurgy of uranium ore (II)[J]. Journal of Nuclear Science and Technology, 1996,33(4):327−332. doi: 10.1080/18811248.1996.9731912
[9]	Hiroyuki M, Fumitaka T. Chlorination kinetics of ZnO with Ar-Cl₂-O₂ gas and the effect of oxychloride formation[J]. Metallurgical and Materials Transactions B, 2006,37(3):413−420. doi: 10.1007/s11663-006-0026-7
[10]	Hiroyuki M, Tasuku H, Fumitaka T. Chlorination kinetics of ZnFe₂O₄ with Ar-Cl₂-O₂ gas[J]. Materials Transactions, 2006,47(10):2524−2532. doi: 10.2320/matertrans.47.2524
[11]	Jungshin K, Toru H O. Removal of iron from titanium ore by selective chlorination using TiCl₄ under high oxygen chemical potential[J]. International Journal of Mineral Processing, 2016,149:111−118. doi: 10.1016/j.minpro.2016.02.014