含B<sub>2</sub>O<sub>3</sub>钙铝基连铸保护渣剪切变稀特性

doi:10.13228/j.boyuan.issn1005-4006.20200155

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Abstract To take into account the performance of the calcium-aluminum-based mold flux in regions of the mold with different shear rates, the shear-thinning properties of the CaO-Al₂O₃-Li₂O-B₂O₃ mold flux were studied from the perspective of non-Newtonian fluid characteristics. The results show that in the shear-thinning temperature range, as the temperature decreased, the shear-thinning properties of the mold flux become stronger. In the calcium-aluminum-based mold flux, B₂O₃ had a significant inhibitory effect on the shear-thinning properties, which was opposite to its role in the silica-based mold flux. At 1 300 ℃, when the mass fraction of B₂O₃ increased from 4% to 6%, the shear-thinning properties gradually become weaker. When the mass fraction of B₂O₃ increased to 8%, the molten slag was transformed into a Newtonian fluid, showing no shear thinning properties.

Key words： calcium-aluminum-based mold flux shear-thinning non-Newtonian fluid viscosity high aluminum steel

Received: 29 December 2020

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	Articles by authors
	LIU Hao
	QI Jie
	LIU Cheng-jun
	JIANG Mao-fa

Cite this article:

LIU Hao,QI Jie,LIU Cheng-jun等. Shear thinning properties of calcium-aluminum-based mold flux containing B₂O₃[J]. CONTINUOUS CASTING, 2021, 40(2): 19-24.

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20200155 OR http://www.chinamet.cn/Jweb_lz/EN/Y2021/V40/I2/19

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