Efficient metallurgical extraction of vanadium slag: Sodium-magnesium composite roasting vanadium extraction process

CAO Shuai; XIANG Junyi; HUANG Qingyun; SHEN Biao; HE Wenyi; WEI Linsen; LÜ Xuewei

doi:10.7513/j.issn.1004-7638.2025.06.004

Volume 46 Issue 6

Dec. 2025

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CAO Shuai, XIANG Junyi, HUANG Qingyun, SHEN Biao, HE Wenyi, WEI Linsen, LÜ Xuewei. Efficient metallurgical extraction of vanadium slag: Sodium-magnesium composite roasting vanadium extraction process[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(6): 40-46. doi: 10.7513/j.issn.1004-7638.2025.06.004

Citation:

CAO Shuai, XIANG Junyi, HUANG Qingyun, SHEN Biao, HE Wenyi, WEI Linsen, LÜ Xuewei. Efficient metallurgical extraction of vanadium slag: Sodium-magnesium composite roasting vanadium extraction process[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(6): 40-46. doi: 10.7513/j.issn.1004-7638.2025.06.004

Citation:

CAO Shuai, XIANG Junyi, HUANG Qingyun, SHEN Biao, HE Wenyi, WEI Linsen, LÜ Xuewei. Efficient metallurgical extraction of vanadium slag: Sodium-magnesium composite roasting vanadium extraction process[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(6): 40-46. doi: 10.7513/j.issn.1004-7638.2025.06.004

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Efficient metallurgical extraction of vanadium slag: Sodium-magnesium composite roasting vanadium extraction process

doi: 10.7513/j.issn.1004-7638.2025.06.004

1.
School of Metallurgy and Power Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
2.
Pangang Group Research Institute Co., Ltd., State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Panzhihua 617000, Sichuan, China
3.
Pangang Group Vanadium Titanium Resources Co., Ltd., Panzhihua 617067, Sichuan, China
4.
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China

More Information

Received Date: 2025-04-07
Accepted Date: 2025-05-07
Rev Recd Date: 2025-04-28

Available Online: 2025-12-31

Publish Date: 2025-12-31

Abstract

Abstract

Alkaline earth metals can easily form water-insoluble calcium/magnesium vanadates during sodium roasting of vanadium slag, leading to a decrease in vanadium recovery rate. However, the moderate MgO addition facilitates the formation of a highly soluble sodium-magnesium vanadate (Na₆Mg₂V₄O₁₅). Based on this discovery, we propose an innovative sodium-magnesium composite roasting process for the vanadium extraction from vanadium slag. Experimental results reveal that Na₆Mg₂V₄O₁₅ exhibits superior dissolution performance under the alkaline leaching conditions (pH~11) of the typical sodium-roasted vanadium slag. The highest vanadium leaching efficiency of 85.30% is obtained under the conventional sodium roasting conditions (20% Na₂CO₃ dosage, 875 ℃). By using the composite roasting process with 3% MgO addition, the Na₂CO₃ dosage is reduced to 18% and the leaching rate is increase to 90.38%. Phase composition analysis of the roasted samples and leached residues indicates that composite roasting promotes the formation of sodium-magnesium vanadate and its subsequent dissolution. This cost-effective strategy of partially substituting sodium salts with magnesium salts provides a novel approach for optimizing conventional sodium roasting processes, leading to the reduction of costs and increase of efficiency in the sodium vanadium extraction process.
- vanadium slag,
- sodium-magnesium composite roasting,
- sodium roasting,
- vanadium extraction

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References(21)

References

[1]	DONG Z H, YANG R L, YANG R C, et al. Research progress on the comprehensive utilization of converter vanadium slag[J]. Sustainable Mining and Metallurgy, 2024, 40(4): 18-23,31. (董自慧, 杨瑞兰, 杨瑞臣, 等. 转炉钒渣综合利用研究进展[J]. 绿色矿冶, 2024, 40(4): 18-23,31. DONG Z H, YANG R L, YANG R C, et al. Research progress on the comprehensive utilization of converter vanadium slag[J]. Sustainable Mining and Metallurgy, 2024, 40（4）: 18-23,31.
[2]	GAO F, OLAVIWOLA A U, LIU B, et al. Review of vanadium production part I: primary resources[J]. Mineral Processing and Extractive Metallurgy Review, 2022, 43(4): 466-488. doi: 10.1080/08827508.2021.1883013
[3]	NASIMIFAR A, MEHRABANI J V. A review on the extraction of vanadium pentoxide from primary, secondary, and co-product sources[J]. International Journal of Mining and Geo-Engineering, 2022, 56(4): 361-382.
[4]	JIA L, ZHANG Y, TAO L, et al. A methodology for assessing cleaner production in the vanadium extraction industry[J]. Journal of Cleaner Production, 2014, 84: 598-605. doi: 10.1016/j.jclepro.2013.05.016
[5]	SIMANDL G J, PARADIS S. Vanadium as a critical material: economic geology with emphasis on market and the main deposit types[J]. Applied Earth Science, 2022, 131(4): 218-236. doi: 10.1080/25726838.2022.2102883
[6]	RODBY K E, JAFFE R L, OLIVETTI E A, et al. Materials availability and supply chain considerations for vanadium in grid-scale redox flow batteries[J]. Journal of Power Sources, 2023, 560: 232605. doi: 10.1016/j.jpowsour.2022.232605
[7]	BLEECKER W F. Process of producing copper, lead, or iron vanadate from vanadiferous ores: U. S. Patent 1, 015, 469[P]. 1912-1-23.
[8]	JENA P K, BROCCHI E A. Halide metallurgy of refractory metals[J]. Mineral Processing and Extractive Metullargy Review, 1992, 10(1): 29-40. doi: 10.1080/08827509208914073
[9]	LI H Y, FANG H X, WANG K, et al. Asynchronous extraction of vanadium and chromium from vanadium slag by stepwise sodium roasting–water leaching[J]. Hydrometallurgy, 2015, 156: 124-135. doi: 10.1016/j.hydromet.2015.06.003
[10]	LI L J, CHEN D H, BAI R G, et al. Research progress of extraction technology for vanadium & chromium from vanadium slags[J]. Multipurpose Utilization of Mineral Resources, 2013(2): 7-11. (李兰杰, 陈东辉, 白瑞国, 等. 钒渣中钒铬提取技术研究进展[J]. 矿产综合利用, 2013(2): 7-11. doi: 10.3969/j.issn.1000-6532.2013.02.003 LI L J, CHEN D H, BAI R G, et al. Research progress of extraction technology for vanadium & chromium from vanadium slags[J]. Multipurpose Utilization of Mineral Resources, 2013（2）: 7-11. doi: 10.3969/j.issn.1000-6532.2013.02.003
[11]	WANG Y. Low-temperature reduction degradation behavior of vanadium-titanium pellet in H₂-CO mixtures[D]. Chongqing: Chongqing University, 2022. (王月. H₂-CO作用下钒钛矿球团低温还原粉化行为研究[D]. 重庆: 重庆大学, 2022. WANG Y. Low-temperature reduction degradation behavior of vanadium-titanium pellet in H₂-CO mixtures[D]. Chongqing: Chongqing University, 2022.
[12]	JIN E G, ZHOU Y, CHEN J, et al. Research progress on treatment and resource utilization technology of manure and sewage in dairy farm[J]. Animal Husbandry and Feed Science, 2019, 41(1): 82-87. (金尔光, 周源, 陈洁, 等. 奶牛场粪污处理与资源化利用技术研究进展[J]. 畜牧与饲料科学, 2020, 41(1): 82-87. JIN E G, ZHOU Y, CHEN J, et al. Research progress on treatment and resource utilization technology of manure and sewage in dairy farm[J]. Animal Husbandry and Feed Science, 2019, 41(1): 82-87.
[13]	HU P W, XIE Z C, HU B, et al. Comprehensive utilization status and development of vanadium-bearing solid wastes[J]. Conservation and Utilization of Mineral Resources, 2020, 40(5): 144-152. (胡佩伟, 谢志诚, 胡兵, 等. 含钒固废综合利用现状及发展[J]. 矿产保护与利用, 2020, 40(5): 144-152. HU P W, XIE Z C, HU B, et al. Comprehensive utilization status and development of vanadium-bearing solid wastes[J]. Conservation and Utilization of Mineral Resources, 2020, 40（5）: 144-152.
[14]	WANG X. Study on extraction of vanadium from vanadium slag through composite roasting with CaO/MgO and acid leaching process[D]. Chongqing: Chongqing University, 2022. (王鑫. 钒渣钙镁复合焙烧—酸浸提钒工艺研究[D]. 重庆: 重庆大学, 2022. WANG X. Study on extraction of vanadium from vanadium slag through composite roasting with CaO/MgO and acid leaching process[D]. Chongqing: Chongqing University, 2022.
[15]	WEN J, JIANG T, XU Y, et al. Efficient extraction and separation of vanadium and chromium in high chromium vanadium slag by sodium salt roasting-(NH₄)₂SO₄ leaching[J]. Journal of industrial and engineering chemistry, 2019, 71: 327-335. doi: 10.1016/j.jiec.2018.11.043
[16]	LI M, XIAO L, LIU J J, et al. Effective extraction of vanadium and chromium from high chromium content vanadium slag by sodium roasting and water leaching[C]//Materials Science Forum. Trans Tech Publications Ltd., 2016, 863: 144-148.
[17]	YIN Z Q, LI Q W, FU Z B, et al. Technology research on sodium salt roasting of vanadium slag pellet[J]. Iron Steel Vanadium Titanium, 2016, 37(1): 12-15, 20. (殷兆迁, 李千文, 付自碧, 等. 钒渣钠化球团化焙烧技术研究[J]. 钢铁钒钛, 2016, 37(1): 12-15, 20. doi: 10.7513/j.issn.1004-7638.2016.01.003 YIN Z Q, LI Q W, FU Z B, et al. Technology research on sodium salt roasting of vanadium slag pellet[J]. Iron Steel Vanadium Titanium, 2016, 37（1）: 12-15, 20. doi: 10.7513/j.issn.1004-7638.2016.01.003
[18]	LI W. Study on the reaction behavior in sodium roasting of high vanadium slag[D]. Shenyang: Northeastern University, 2014. (李尉. 高钒渣钠化焙烧反应行为研究[D]. 沈阳: 东北大学, 2014. LI W. Study on the reaction behavior in sodium roasting of high vanadium slag[D]. Shenyang: Northeastern University, 2014.
[19]	YANG M, YANG H, TIAN S, et al. Effect of mechanical activation on extraction of vanadium from chromium-containing vanadate solution by calcification and carbonization[J]. Hydrometallurgy, 2021, 201: 105591. doi: 10.1016/j.hydromet.2021.105591
[20]	LIU D, XUE X X, YANG H. Reaction mechanism of magnesium in roasting of vanadium slag[J]. Anais da Academia Brasileira de Ciências, 2020, 92(2): e20181062.
[21]	PEI G S. Thermodynamic modeling of CaO-MgO-R₂O-V₂O₅ (R=Li, Na, K, Rb, and Cs) systems and its applications[D]. Chongqing: Chongqing University, 2023. (裴贵尚. CaO-MgO-R₂O-V₂O₅(R=Li、Na、K、Rb和Cs)体系热力学模型构建及其应用[D]. 重庆: 重庆大学, 2023. PEI G S. Thermodynamic modeling of CaO-MgO-R₂O-V₂O₅ (R=Li, Na, K, Rb, and Cs) systems and its applications[D]. Chongqing: Chongqing University, 2023.