Effect of cooling temperature-holding time on the crystallization of molten-separated titanium slag

LI Chenhui; DU Peipei; ZHAO Suxing; TIAN Tielei; LI Lanjie; LONG Yue

doi:10.7513/j.issn.1004-7638.2026.01.003

Volume 47 Issue 1

Feb. 2026

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LI Chenhui, DU Peipei, ZHAO Suxing, TIAN Tielei, LI Lanjie, LONG Yue. Effect of cooling temperature-holding time on the crystallization of molten-separated titanium slag[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(1): 17-27. doi: 10.7513/j.issn.1004-7638.2026.01.003

Citation:

LI Chenhui, DU Peipei, ZHAO Suxing, TIAN Tielei, LI Lanjie, LONG Yue. Effect of cooling temperature-holding time on the crystallization of molten-separated titanium slag[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(1): 17-27. doi: 10.7513/j.issn.1004-7638.2026.01.003

Citation:

LI Chenhui, DU Peipei, ZHAO Suxing, TIAN Tielei, LI Lanjie, LONG Yue. Effect of cooling temperature-holding time on the crystallization of molten-separated titanium slag[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(1): 17-27. doi: 10.7513/j.issn.1004-7638.2026.01.003

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Effect of cooling temperature-holding time on the crystallization of molten-separated titanium slag

doi: 10.7513/j.issn.1004-7638.2026.01.003

1.
College of Metallurgy and Energy Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, China
2.
HBIS Material Technology Research Institute, Shijiazhuang 050023, Hebei, China

More Information

Received Date: 2025-09-03
Accepted Date: 2025-10-14
Rev Recd Date: 2025-09-28

Available Online: 2026-02-28

Publish Date: 2026-02-28

Abstract

Abstract

To achieve efficient extraction of titanium components from molten-separated titanium slag, this study took the slag from a steel plant as the research object, and systematically investigated the crystallization behavior of the slag under synergistic control of cooling temperature (1150~1300 ℃) and holding time (0~60 min) through high-temperature melting crystallization experiment and XRD analysis. The results indicated that the optimal crystallization window for anosovite-MgTi₂O₅ is 1250~1300 ℃ with 30~50 min, and the precipitation amount reaches 51.2%~56.2%; the optimal crystallization window for pseudobrookite-Fe₂TiO₅ is 1150~1200 ℃ with 40~60 min, and the precipitation amount is 38%~40%; the optimal crystallization window for rutile-TiO₂ is 1150~1200 ℃ with 0~30 min, and the precipitation amount reaches 25%~35%. The crystallization behaviors of the three phases exhibit an obvious competitive relationship, and the optimal crystallization window of a single phase highly overlaps with the suppression regions of the other two. This provides a precise process optimization window for either directional promotion or targeted suppression of specific titanium-bearing phases, offering a theoretical basis for the directional separation and extraction of titanium components from industrial molten-separated titanium slag.
- molten-separated titanium slag,
- cooling temperature,
- holding time,
- crystallization behavior

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References(51)

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