Separation of iron and vanadium from titanomagnetite by thermal treatment and magnetic separation

Document Type : Research Paper

Authors

Mineral Processing Department, Mobarakeh Steel Company, Isfahan, Iran.

10.22059/ijmge.2025.395569.595252

Abstract

In this paper, the extraction of iron and vanadium from titanomagnetite sources was studied by a reduction roasting process. Titanomagnetite has a spinel structure, and roasting facilitates its decomposition, making it easier to separate iron and titanium. In the roasting stage, several key parameters including temperature, particle size, and oxidation roasting were investigated for the iron separation, and a magnetic separator was used at a field intensity of 800 G to enrich the roasted product. For iron extraction, decreasing the particle size resulted in an increase in grade, and increasing temperature and oxidation did not have a positive effect on increase in grade. The highest iron grade and recovery were 65.32% and 65.77%, respectively, and were obtained with a particle size less than 38µm and a temperature of 550°C. The tailings from the magnetic separation stage contain titanium and vanadium, so the separation of vanadium was investigated using salt roasting at a temperature of 900°C and a roasting time of 2 h followed by leaching with water. The highest grade and recovery of vanadium oxide were obtained at 67.51% and 69.4%, respectively.

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References

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International Journal of Mining and Geo-Engineering
Volume 59, Issue 2
June 2025
Pages 143-149

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