Preparation of titanium dioxide from acid leaching solution of high titanium blast furnace slag by boiling hydrolysis

Huang Chen; He Siqi; Tang Yumei; Wang Yan; Sun Hongjuan

doi:10.7513/j.issn.1004-7638.2021.03.007

Volume 42 Issue 3

Jun. 2021

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Huang Chen, He Siqi, Tang Yumei, Wang Yan, Sun Hongjuan. Preparation of titanium dioxide from acid leaching solution of high titanium blast furnace slag by boiling hydrolysis[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(3): 44-52, 93. doi: 10.7513/j.issn.1004-7638.2021.03.007

Citation:

Huang Chen, He Siqi, Tang Yumei, Wang Yan, Sun Hongjuan. Preparation of titanium dioxide from acid leaching solution of high titanium blast furnace slag by boiling hydrolysis[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(3): 44-52, 93. doi: 10.7513/j.issn.1004-7638.2021.03.007

Citation:

Huang Chen, He Siqi, Tang Yumei, Wang Yan, Sun Hongjuan. Preparation of titanium dioxide from acid leaching solution of high titanium blast furnace slag by boiling hydrolysis[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(3): 44-52, 93. doi: 10.7513/j.issn.1004-7638.2021.03.007

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Preparation of titanium dioxide from acid leaching solution of high titanium blast furnace slag by boiling hydrolysis

doi: 10.7513/j.issn.1004-7638.2021.03.007

Huang Chen^{1, 2
,},
He Siqi³,
Tang Yumei^{1, 2},
Wang Yan^{1
,
,},
Sun Hongjuan

1.
School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621000, Sichuan, China
2.
Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Mianyang 621000, Sichuan, China
3.
College of Resources and Environmental Engineering, Mianyang Normal University, Mianyang 621000, Sichuan, China

Received Date: 2021-04-14
Publish Date: 2021-06-10

Abstract

Abstract

In order to solve the problem of incomplete treatment of high titanium blast furnace slag in Panxi area, the titanium component was extracted by sulfuric acid, and the effects of pH value of base liquid, hydrolysis temperature, feeding rate, aging time and second-boiling time on the hydrolysis rate of Ti⁴⁺ and the structure of hydrolysate were investigated. The results show that the pH value of base liquid, the hydrolysis temperature and the aging time have significant effects on the hydrolysis rate and the hydrolysate structure. pH value of base liquid, feeding rate and aging time are positively related to the size and dispersion of the hydrolysate, while the hydrolysis temperature is negatively related to them. The second-boiling time has little effect on the size and dispersion of the hydrolysate. The optimal hydrolysis conditions are pH=1.7, hydrolysis temperature of 105 ℃, feeding rate of 6.6 mL/min, aging time of 25 min and second-boiling time of 60 min. Under the optimum conditions, the hydrolysis rate of Ti component is 90.71%. After calcination at high temperature, the obtained metatitanic acid transforms into anatase titanium dioxide, meeting the national standard of non-pigment titanium dioxide.
- titanium dioxide,
- high titanium blast furnace slag,
- sulfuric acid,
- leaching solution,
- boiling hydrolysis,
- hydrolysis ratio

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References(17)

References

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