Solid phase reaction and diffusion behavior of V2O5/Cr2O3-CaO system based on calcification roasting of chromium–containing vanadium slag

Sun Hongyan; Wen Jing; Chen Bojian; Yu Tangxia; Jiang Tao

doi:10.7513/j.issn.1004-7638.2021.03.003

Volume 42 Issue 3

Jun. 2021

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Sun Hongyan, Wen Jing, Chen Bojian, Yu Tangxia, Jiang Tao. Solid phase reaction and diffusion behavior of V2O5/Cr2O3-CaO system based on calcification roasting of chromium–containing vanadium slag[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(3): 17-24. doi: 10.7513/j.issn.1004-7638.2021.03.003

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Sun Hongyan, Wen Jing, Chen Bojian, Yu Tangxia, Jiang Tao. Solid phase reaction and diffusion behavior of V₂O₅/Cr₂O₃-CaO system based on calcification roasting of chromium–containing vanadium slag[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(3): 17-24. doi: 10.7513/j.issn.1004-7638.2021.03.003

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Solid phase reaction and diffusion behavior of V₂O₅/Cr₂O₃-CaO system based on calcification roasting of chromium–containing vanadium slag

doi: 10.7513/j.issn.1004-7638.2021.03.003

School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China

Received Date: 2021-03-12
Publish Date: 2021-06-10

Abstract

Abstract

The difference in combining ability with calcium between vanadium and chromium in the calcification roasting process of chromium-containing vanadium slag was investigated by V₂O₅-CaO and Cr₂O₃-CaO diffusion couples which were prepared by roasting at constant temperature with V₂O₅, Cr₂O₃ and CaO as raw materials. The microstructure of the diffusion interface and the element distribution of the product layer were observed and detected by SEM-EDS. The effect of roasting time on solid phase interface reaction were analyzed, and the diffusion coefficient was calculated by Wagner equation. The results show that a recognizable product layer at the interface of the V₂O₅-CaO diffusion couple can be found by roasting at 873 K for 9 h in air atmosphere. The thickness of the product layer is linearly related to the square root of roasting time, indicating a diffusion-controlled process for the solid phase reaction, with the product layer mainly composed of CaV₂O₆. Under the same roasting condition, no obvious product layer is formed in Cr₂O₃-CaO diffusion couple. It suggests that the solid-solid interface reaction ability between vanadium and calcium is stronger than that of chromium and calcium. The order of magnitude of diffusion coefficient of V₂O₅-CaO diffusion couple is 10⁻¹⁰ cm²·s⁻¹.
- vanadium extracaction,
- chromium-containing vanadium,
- calcification roasting,
- diffusion behavior,
- diffusion couple,
- solid phase

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References

[1]	Chu Mansheng, Tang Jue, Liu Zhenggen, et al. The extraction of vanadium from fired titanovanadium-bearing magnetite pellets with sodium sulphate addition[J]. Journal of Iron and Steel Research, 2017,29(5):335−344. (储满生, 唐珏, 柳政根, 等. 高铬型钒钛磁铁矿综合利用现状及进展[J]. 钢铁研究学报, 2017,29(5):335−344.
[2]	Tang Jue, Zhang Yong, Chu Mansheng, et al. Preparation of oxidized pellets with high chromium vanadium-titanium magnetite[J]. Journal of Northeastern University (Natural Science), 2013,34(4):545−550. (唐珏, 张勇, 储满生, 等. 以高铬型钒钛磁铁矿制备氧化球团[J]. 东北大学学报(自然科学版), 2013,34(4):545−550. doi: 10.3969/j.issn.1005-3026.2013.04.022
[3]	Gao Shimin. Discussion on smelting technology of a high chromium vanadium titanium magnetite[J]. Iron Steel vanadium Titanium, 2020,41(5):27−36. (高师敏. 一种高铬型钒钛磁铁矿冶炼工艺探讨[J]. 钢铁钒钛, 2020,41(5):27−36.
[4]	（高官金. 高铬钒渣的综合利用[D]. 北京: 中国科学院大学, 2017.） Gao Guanjin. Study on comprehensive utilization of high-chromium vanadium slag[D]. Beijing: Unversity of Chinese Academy of Sciences, 2017.
[5]	Jiang Tao, Wen Jing, Zhou Mi, et al. Phase evolutions, microstructure and reaction mechanism during calcification roasting of high chromium vanadium slag[J]. Journal of Alloys & Compounds, 2018,742:402−412.
[6]	Wen Jing, Jiang Tao, Xv Yingzhe, et al. Efficient separation and extraction of vanadium and chromium in high chromium vanadium slag by selective two-stage roasting-leaching[J]. Metallurgical and Materials Transactions B, 2018,49(3):1471−1481. doi: 10.1007/s11663-018-1197-8
[7]	Wang Mingyu, Zhou Shengfan, Wang Xuewenw, et al. Recovery of iron from chromium vanadium-bearing titanomagnetite concentrate by direct reduction[J]. Journal of the Minerals Metals & Materials Society, 2016,68(10):2698−2703.
[8]	（李晓军. 钒渣中尖晶石生长规律及钒渣钙化焙烧机理的研究[D]. 重庆: 重庆大学, 2011.） Li Xiaojun. Research on spinels growth law and calcification roasting mechanism of vanadium slag[D]. Chongqing: Chongqing Unversity, 2011.
[9]	Yang Yang, Mao Huahai, Selleby Malin, et al. An assessment of the Ca-V-O system[J]. Calphad: Computer Coupling of Phase Diagrams and Thermochemistry, 2017,56:29−40. doi: 10.1016/j.calphad.2016.11.005
[10]	Wang Zhenghao, Chen Liang, Aldahrib Tahani, et al. Direct recovery of low valence vanadium from vanadium slag―Effect of roasting on vanadium leaching[J]. Hydrometallurgy, 2020:191.
[11]	Wen Jing, Jiang Tao, Wang Junpeng, et al. An efficient utilization of high chromium vanadium slag: Extraction of vanadium based on manganese carbonate roasting and detoxification processing of chromium-containing tailings[J]. Journal of Hazardous Materials, 2019:378.
[12]	Cao Peng. Research on vanadium slag roasted with calcium salt[J]. Iron Steel vanadium Titanium, 2012,33(1):30−34. (曹鹏. 钒渣钒渣钙化焙烧试验研究[J]. 钢铁钒钛, 2012,33(1):30−34. doi: 10.7513/j.issn.1004-7638.2012.01.006
[13]	Zhang Juhua, Zhang Wei, Yang Yongxia, et al. Influencing factors of vanadium slag roasting with calcium and oxidation kinetics for roasting process[J]. Journal of Northeastern University (Natural Science), 2014,35(6):831−835. (张菊花, 张伟, 杨勇霞, 等. 钒渣钙化焙烧的影响因素及焙烧氧化动力学[J]. 东北大学学报(自然科学版), 2014,35(6):831−835. doi: 10.3969/j.issn.1005-3026.2014.06.016
[14]	Fu Nianxin, Zhang Lin, Liu Wuhan, et al. Behavior of phase transformations in oxidation of vanadium slags with participation of limestone[J]. The Chinese Journal of Process Engineering, 2017,17(2):285−291. (付念新, 张林, 刘武汉, 等. 钒渣添加石灰石氧化焙烧过程物相转化行为[J]. 过程工程学报, 2017,17(2):285−291. doi: 10.12034/j.issn.1009-606X.216297
[15]	Akira Shimizu, Saitou Junji, Hao Yujun, et al. Effect of contact points between particles on the reaction rate in the Fe₂O₃-V₂O₅ system[J]. Solid State Lonics, 1990,38(3−4):261−269. doi: 10.1016/0167-2738(90)90431-P
[16]	Chen Bojian, Zhou Mi, Jiang Tao, et al. Observation of diffusion behavior between Cr₂O₃ and calcium ferrite based on diffusion couple method for 1373K[J]. Journal of Alloys & Compounds, 2019,802:103−111.
[17]	Wu Dousi, Lu Shuqin, Lu Jinsuo. The hydrogenoid calculation formula of cation radius[J]. Chinese Science Bulletion, 1987,(3):195−199. (吴斗思, 卢淑琴, 卢锦梭. 阳离子半径的类氢化计算公式[J]. 科学通报, 1987,(3):195−199.
[18]	Ren Zhongshan, Hu Xiaojun, Xue Xiangxin, et al. Solid state reaction studies in Fe₃O₄-TiO₂ system by diffusion couple method[J]. Journal of Alloys & Compounds, 2013,580:182−186.
[19]	Jin Mingfang, Li Guangsen, Chu Mansheng, et al. Diffusion between MgO and hematite during sintering[J]. Iron and Steel, 2008,43(3):10−14. (金明芳, 李光森, 储满生, 等. 烧结过程中MgO在赤铁矿中的扩散行为的研究[J]. 钢铁, 2008,43(3):10−14. doi: 10.3321/j.issn:0449-749X.2008.03.002
[20]	Wagner C. The evaluation of data obtained with diffusion couples of binary single-phase and multiphase systems[J]. Acta Metallurgica, 1969,17(2):99−107. doi: 10.1016/0001-6160(69)90131-X