ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Effect of basicity on the viscosity and phase structure of chromium-containing high-titanium blast furnace slag
Zhenyun TianJialong KangLiu YangJian WangGuibao Qiu
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JOURNAL OPEN ACCESS Advance online publication

Article ID: ISIJINT-2024-308

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Abstract

Vanadium-titanium magnetite boasts a formidable storage capacity within China, particularly illustrated by the Hongge ore, amounting to an astounding 1.829 billion tons ripe for extraction. Nevertheless, the intricate mineral composition of the Hongge ore, which exhibits an extraordinary concentration of Cr2O3, presents significant challenges for its effective utilization. To date, only preliminary explorations have been undertaken on the Hongge ore, and investigations into its ore phase composition, as well as the processes of beneficiation and smelting, remain decidedly limited. This study undertakes a theoretical and experimental investigation of the viscous flow characteristics of the CaO-SiO2-MgO-TiO2-Al2O3-Cr2O3 slag system, seeking to elucidate the impact of basicity on the viscous properties of the slag derived from Hongge ore. As the basicity increases, the slag's viscosity decreases, the activation energy for viscous flow initially increases and then decreases, while its melting temperature exhibits an upward trend. It is recommended that, when the Hongge ore is utilized as metallurgical raw material, the slag's basicity should not surpass 1.10.

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© 2025 The Iron and Steel Institute of Japan

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