Research on the leaching characteristics of Ca, Mg, Al elements in high titanium blast furnace slag

Huangfu Lin; Jiang Yang; Qiu Zhengqiu; Wang Kui

doi:10.7513/j.issn.1004-7638.2023.04.003

Volume 44 Issue 4

Aug. 2023

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Huangfu Lin, Jiang Yang, Qiu Zhengqiu, Wang Kui. Research on the leaching characteristics of Ca, Mg, Al elements in high titanium blast furnace slag[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(4): 18-24. doi: 10.7513/j.issn.1004-7638.2023.04.003

Citation:

Huangfu Lin, Jiang Yang, Qiu Zhengqiu, Wang Kui. Research on the leaching characteristics of Ca, Mg, Al elements in high titanium blast furnace slag[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(4): 18-24. doi: 10.7513/j.issn.1004-7638.2023.04.003

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Research on the leaching characteristics of Ca, Mg, Al elements in high titanium blast furnace slag

doi: 10.7513/j.issn.1004-7638.2023.04.003

Huangfu Lin^{1, 2
,},
Jiang Yang^{1, 2},
Qiu Zhengqiu¹,
Wang Kui^{1, 2}

1.
State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Pangang Group Research Institute Co., Ltd., Panzhihua 617000, Sichuan, China
2.
Department of Advanced Functional Materials, Chengdu Institute of Advanced Metallic Material Technology and Industry Co., Ltd., Chengdu 610305, Sichuan, China

Received Date: 2023-05-12
Publish Date: 2023-08-30

Abstract

Abstract

To make full use of the valuable elements in high titanium blast furnace slag, the physical and chemical properties were analyzed. The method of hydrochloric acid hydrothermal leaching was proposed to separate Ca and Mg elements from high titanium blast furnace slag. And the influence of reaction condition parameters on the leaching characteristics of elements in high titanium blast furnace slag was studied. The results reveal that with the increase of hydrochloric acid concentration, hydrochloric acid amount, reaction temperature and reaction time, the leaching efficiency of Ca, Mg and Al elements in high titanium blast furnace slag all increase. Among them, the leaching efficiency of Mg and Al remain stable when they are higher than 95%, while the leaching efficiency of Ca can raise to nearly 100%. The Ca and Mg elements in high titanium blast furnace slag can be entirely dissociated when the concentration of hydrochloric acid is 4 mol/L, the amount of hydrochloric acid is 1.5 times of theoretical acid amount required for the entire dissolution of Ca, Mg and Al elements in high titanium blast furnace slag, the reaction temperature is 150 ℃, the reaction time is 10 h. Meanwhile, the amounts of both MgO and CaO in the leaching residue are all below 1%, and the aggregate amounts of TiO₂, SiO₂ and Al₂O₃ are higher than 95%, which can fulfill the requirements of preparing porous adsorption materials. The results of this research are anticipated to provide data support for the efficient utilization of high titanium blast furnace slag.
- high titanium blast furnace slag,
- resource utilization,
- hydrochloric acid,
- hydrothermal leaching,
- porous adsorption materials

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References(25)

References

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