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| Occurrence characteristics and secondary recovery of titanium from titanium separation tailings of Panzhihua ilmenite |
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Received:November 25, 2024
Revised:January 07, 2025
Accepted:February 06, 2025
Published Online:April 30, 2026
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| DOI：10.3969/j.issn.1005-7854.2026.01.007 |
| KeyWord:ilmenite;tailings;titanium;process mineralogy;high-intensity magnetic separation;gravity separation;combined process;pre-concentration |
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| 1.Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, China;2.State Key Laboratory of Clean Utilization of Complex Nonferrous Metals, Kunming 650093, China |
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| Abstract: |
| To achieve the secondary utilization of titanium resources in the Panzhihua area, systematic process mineralogy and mineral processing test studies were conducted on the titanium separation tailings. The process mineralogy analysis indicates that the tailings have a TiO2 grade of 4.63% and an SiO2 content of 45.57%, classifying them as typical low-grade, high-silica titanium-bearing iron ore. The occurrence form of titanium is complex, with 72.57% existing as ilmenite, which is finely disseminated (mainly in the range of 0.02 ?0.36 mm). An additional 22.25% of titanium occurs in silicate minerals in an isomorphic form, increasing the difficulty of recovery. The mineral processing test results show that under the condition of a grinding fineness of 72% passing ?0.074 mm, it is difficult to achieve effective concentration of ilmenite using single methods such as high-intensity magnetic separation, shaking table gravity separation, or spiral chute gravity separation. Ultimately, a combined process of high-intensity magnetic separation and shaking table gravity separation was adopted, successfully obtaining a pre-concentrate with a TiO2 grade of 15.32% and a recovery of 53.44%. This provides a feasible technical pathway for the comprehensive utilization of titanium resources in similar complex tailings. |
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