Study on the behavior of unburnt pulverized coal and reduction productions of TiO<sub>2</sub> in high-titanium blast furnace slag

Xie Hong’en; Zheng Kui; Hu Peng; Tang Wenbo; Ling Xinke

doi:10.7513/j.issn.1004-7638.2024.06.016

Volume 45 Issue 6

Dec. 2024

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Article Navigation > IRON STEEL VANADIUM TITANIUM > 2024 > 45(6): 119-126

Xie Hong’en, Zheng Kui, Hu Peng, Tang Wenbo, Ling Xinke. Study on the behavior of unburnt pulverized coal and reduction productions of TiO2 in high-titanium blast furnace slag[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(6): 119-126. doi: 10.7513/j.issn.1004-7638.2024.06.016

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Xie Hong’en, Zheng Kui, Hu Peng, Tang Wenbo, Ling Xinke. Study on the behavior of unburnt pulverized coal and reduction productions of TiO₂ in high-titanium blast furnace slag[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(6): 119-126. doi: 10.7513/j.issn.1004-7638.2024.06.016

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Study on the behavior of unburnt pulverized coal and reduction productions of TiO₂ in high-titanium blast furnace slag

doi: 10.7513/j.issn.1004-7638.2024.06.016

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

Received Date: 2023-08-24
Available Online: 2024-12-30
Publish Date: 2024-12-30

Abstract

Abstract

In this study, the viscosity of high-titanium blast furnace slags uniformly mixed with unburnt pulverized coal (UPC) was measured by using the method of rotating cylinder firstly. Then the distribution and behavior of the residual UPC and the reduction products were analyzed according to the macro morphology of these samples and their microscopic morphology of different parts. It was found that TiO₂ would inevitably be reduced by UPC, the high melting point reduction products such as Ti(C,N), TiC_xO_y and unburnt UPC distributed nonuniformly in the slag. As the initial UPC content increased from 0% to 5.51%, the total content of TiC and TiN increased from 0.456% to 2.515%. The high melting point reduction products deposited downwards and aggregated, while the unburnt UPC floated upwards and continued to react with TiO₂ to form foam slag, resulting in a significant increase in both viscosity and its fluctuation. However, there were negligible residual unburnt UPC and high melting point reduction products in the middle of the slag.
- high-titanium blast furnace slag,
- unburnt pulverized coal,
- reduction behavior,
- viscosity,
- titanium carbonitride

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References

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