Study on enhancement of acidolysis rate in ultrafine-grade titanium concentrate

WU Jianchun

doi:10.7513/j.issn.1004-7638.2025.06.008

Volume 46 Issue 6

Dec. 2025

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WU Jianchun. Study on enhancement of acidolysis rate in ultrafine-grade titanium concentrate[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(6): 72-77, 89. doi: 10.7513/j.issn.1004-7638.2025.06.008

Citation:

WU Jianchun. Study on enhancement of acidolysis rate in ultrafine-grade titanium concentrate[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(6): 72-77, 89. doi: 10.7513/j.issn.1004-7638.2025.06.008

WU Jianchun. Study on enhancement of acidolysis rate in ultrafine-grade titanium concentrate[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(6): 72-77, 89. doi: 10.7513/j.issn.1004-7638.2025.06.008

Citation:

WU Jianchun. Study on enhancement of acidolysis rate in ultrafine-grade titanium concentrate[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(6): 72-77, 89. doi: 10.7513/j.issn.1004-7638.2025.06.008

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Study on enhancement of acidolysis rate in ultrafine-grade titanium concentrate

doi: 10.7513/j.issn.1004-7638.2025.06.008

WU Jianchun

State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Pangang Group Research Institute Co., Ltd., Panzhihua 617000, Sichuan, China

More Information

Received Date: 2025-07-03
Accepted Date: 2025-07-29
Rev Recd Date: 2025-07-24

Available Online: 2025-12-31

Publish Date: 2025-12-31

Abstract

Abstract

Utilizing ultrafine-grade titanium concentrate as the raw material, this study investigated the key factors influencing its acidolysis efficiency by comparative analysis of the differences in particle size distribution, chemical composition, and phase composition between ultrafine and conventional-grade concentrates. Acidolysis process optimization was subsequently conducted. The results indicate that the phase structure of the ultrafine-grade titanium concentrate shows no significant difference from the conventional-grade titanium concentrate, with ilmenite being the dominant phase in both. However, the ultrafine-grade titanium concentrate exhibits significantly higher carbon (C) and phosphorus (P) contents. Under the standard acidolysis conditions, the acidolysis rate of the ultrafine-grade titanium concentrate was 3-4 percentage points lower than that of the conventional-grade titanium concentrate. This reduction is primarily attributed to the higher dosage of flotation reagents used during the beneficiation of the ultrafine material, which forms a dense film layer on the particle surfaces, significantly increasing the diffusion resistance of sulfuric acid into the particle interior. The study found that employing chemical intensification measures, such as increasing the reaction acid-to-ore ratio and elevating the reaction acid concentration, effectively disrupts this flotation reagent film layer, thereby substantially enhancing the acidolysis rate. The optimized acidolysis conditions were determined as follows: reaction acid concentration of 85%-86% and acid-to-ore ratio of 1.56-1.58. Under these conditions, the acidolysis rate of the ultrafine-grade concentrate reached up to 96% or higher.
- ultrafine-grade titanium concentrate,
- acidolysis rate,
- flotation agents

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References(9)

References

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