Study on leaching kinetics of titanium from waste denitrification catalyst with salt roasting-acid leaching

Wang Luping; Mei Guangjun; Wu Min; Yuan Qinzhi; Yu Mingming

doi:10.7513/j.issn.1004-7638.2022.03.002

Volume 43 Issue 3

Jun. 2022

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Wang Luping, Mei Guangjun, Wu Min, Yuan Qinzhi, Yu Mingming. Study on leaching kinetics of titanium from waste denitrification catalyst with salt roasting-acid leaching[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(3): 9-13. doi: 10.7513/j.issn.1004-7638.2022.03.002

Citation:

Wang Luping, Mei Guangjun, Wu Min, Yuan Qinzhi, Yu Mingming. Study on leaching kinetics of titanium from waste denitrification catalyst with salt roasting-acid leaching[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(3): 9-13. doi: 10.7513/j.issn.1004-7638.2022.03.002

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Study on leaching kinetics of titanium from waste denitrification catalyst with salt roasting-acid leaching

doi: 10.7513/j.issn.1004-7638.2022.03.002

1.
School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China
2.
School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China

Received Date: 2022-03-30
Publish Date: 2022-06-30

Abstract

Abstract

Titanium from waste denitrification catalyst was recovered by salt roasting-acid leaching method. The leaching kinetics of titanium in sulfuric acid was studied by nuclear shrinkage model of liquid-solid multiphase reaction. The effects of sulfuric acid concentration and acid leaching temperature on the leaching rate of titanium were investigated. The results show that when the temperature is lower than 60 ℃ or the mass fraction of sulfuric acid is less than 45%, the leaching process is controlled by chemical reaction and solid film diffusion. The leaching process of heating up and increasing sulfuric acid concentration is controlled only by chemical reaction. The apparent activation energy is 30.23 kJ/mol under mixed control at low temperature, and 92.92 kJ/mol under chemical control at high temperature, and the apparent reaction order is 4.932. Increasing the reaction temperature and sulfuric acid concentration can accelerate the leaching rate of titanium and improve the leaching rate of titanium.
- spent denitrification catalyst,
- titanium recovery,
- salt roasting-acid leaching,
- leaching,
- kinetics

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References(10)

References

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