Effect of replacing Australian low-alumina iron ore fines with specific high-alumina iron ore fines on high-temperature sintering properties

LIU Yongjun; XING Yapu; LUO Yaosheng; LIU Huayang; KOU Mingyin; WU Shengli; ZHOU Heng

doi:10.7513/j.issn.1004-7638.2026.02.018

Volume 47 Issue 2

Apr. 2026

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LIU Yongjun, XING Yapu, LUO Yaosheng, LIU Huayang, KOU Mingyin, WU Shengli, ZHOU Heng. Effect of replacing Australian low-alumina iron ore fines with specific high-alumina iron ore fines on high-temperature sintering properties[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(2): 164-171. doi: 10.7513/j.issn.1004-7638.2026.02.018

Citation:

LIU Yongjun, XING Yapu, LUO Yaosheng, LIU Huayang, KOU Mingyin, WU Shengli, ZHOU Heng. Effect of replacing Australian low-alumina iron ore fines with specific high-alumina iron ore fines on high-temperature sintering properties[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(2): 164-171. doi: 10.7513/j.issn.1004-7638.2026.02.018

Citation:

LIU Yongjun, XING Yapu, LUO Yaosheng, LIU Huayang, KOU Mingyin, WU Shengli, ZHOU Heng. Effect of replacing Australian low-alumina iron ore fines with specific high-alumina iron ore fines on high-temperature sintering properties[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(2): 164-171. doi: 10.7513/j.issn.1004-7638.2026.02.018

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Effect of replacing Australian low-alumina iron ore fines with specific high-alumina iron ore fines on high-temperature sintering properties

doi: 10.7513/j.issn.1004-7638.2026.02.018

1.
Shougang Jingtang United Iron and Steel Co.，Ltd.，Tangshan 063210，Hebei，China
2.
School of Metallurgical and Ecological Engineering，University of Science and Technology Beijing，Beijing 100083，China

More Information

Received Date: 2026-01-19
Accepted Date: 2026-02-25
Rev Recd Date: 2026-01-23

Available Online: 2026-04-29

Publish Date: 2026-04-29

Abstract

Abstract

A type of high-quality low-aluminum iron ore fines（OE）from Australia has been served as one of the core raw materials in the production of domestic iron and steel enterprises. However, its reserves are gradually being depleted. OA iron ore fines have emerged as one of the potential alternatives to OE due to their favorable price advantage and abundant reserves. Nevertheless, OA iron ore fines exhibit a relatively high Al₂O₃ content. Therefore, how to efficiently utilize OA iron ore fines as a substitute for the low-aluminum OE has become a key research focus in the iron and steel industry. In this study, the mini-sintering method was employed to systematically investigate the variation patterns of the liquid phase fluidity index, intrinsic strength of bonding phase, and formation characteristics of calcium ferrite and high-alumina brittle phases in sintered blended ore after partial or complete replacement of OE with OA. Compared with OE iron ore fines, OA iron ore fines exhibit a higher assimilation temperature and better liquid phase fluidity, whereas their bonding phase strengths are relatively similar. As the OA replacement ratio for OE increases, the liquid phase fluidity index and intrinsic strength of bonding phase of the blended ore increase progressively, whereas the calcium ferrite content decreases correspondingly. X-ray diffraction (XRD) mineral phase analysis reveals that an increase in the OA replacement ratio results in a reduction in calcium ferrite content but an increase in high-alumina brittle phases. Given the high Al₂O₃ content of OA iron ore fines, excessive incorporation of OA tends to inhibit calcium ferrite formation and promote the formation of high-alumina brittle phases. Therefore, in practical production, precise control of the OA replacement ratio is essential to improve the sintering performance of high-aluminum blended ore and enhance the stability of subsequent blast furnace smelting.
- liquid phase fluidity index,
- intrinsic strength of bonding phase,
- calcium ferrite,
- high-alumina brittle material

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References(27)

References

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