Highly efficient separation of titanium minerals from a modified bauxite residue through direct reduction: A comparison study

Zhang, Yuguan; Wang, Yilin; Yi, Lingyun; Qi, Tiangui; Zhou, Qiusheng; Peng, Zhihong; Liu, Guihua; Li, Xiaobin

doi:10.1016/j.jmrt.2023.09.017

Journal of Materials Research and Technology

2023

DOI: 10.1016/j.jmrt.2023.09.017

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Highly efficient separation of titanium minerals from a modified bauxite residue through direct reduction: A comparison study

Yuguan Zhang,

Yilin Wang,

Lingyun Yi

et al.

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2024

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Integrated Recycling of Red Mud for Iron Ore Sinter Manufacturing: Interfacial Bonding Regulation of the Sintering Process

Yi,

Hao,

et al. 2024

ACS Sustainable Chem. Eng.

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Recycling of red mud (RM) has posed an enduring challenge for the alumina industry. This work offers a comprehensive investigation into the fundamental and applied research of RM blend into the iron ore sintering process. Microsintering test was employed to investigate the formation and properties of bonding phase affected by RM. It resulted in impairment of bonding phase infiltration onto the iron ore surface and a decrease in the interfacial bonding strength. The interfacial interaction mechanism showed that the excessive TiO 2 and Al 2 O 3 brought by RM leads to the transformation of calcium ferrite (the target bonding phase) into perovskite and spinel with high melting points, resulting in the evolution of bonding phase from original dense strip-crystallized structure to fine-grained porous. Incorporation of CaO in conjunction with RM facilitates the formation of calcium ferrite within the bonding phase and enhances its infiltration on the iron ore surface, thereby augmenting interfacial bonding strength. Pilot-scale sintering was successfully conducted with 6% RM and 1.5% quicklime. The sinter yield of 76.68% and a tumbling index of 64.98% can be obtained, which were comparable to those achieved without RM, offering a feasible approach for large-scale recycling of RM in the steel industry.

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Integrated Recycling of Red Mud for Iron Ore Sinter Manufacturing: Interfacial Bonding Regulation of the Sintering Process

Yi,

Hao,

et al. 2024

ACS Sustainable Chem. Eng.

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show abstract

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Highly efficient separation of titanium minerals from a modified bauxite residue through direct reduction: A comparison study

Cited by 1 publication

References 19 publications

Integrated Recycling of Red Mud for Iron Ore Sinter Manufacturing: Interfacial Bonding Regulation of the Sintering Process

Integrated Recycling of Red Mud for Iron Ore Sinter Manufacturing: Interfacial Bonding Regulation of the Sintering Process

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