Basic characteristics of Australian iron ore concentrate and its effects on sinter properties during the high-limonite sintering process

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Abstract

The basic characteristics of Australian iron ore concentrate (Ore-A) and its effects on sinter properties during a high-limonite sintering process were studied using micro-sinter and sinter pot methods. The results show that the Ore-A exhibits good granulation properties, strong liquid flow capability, high bonding phase strength and crystal strength, but poor assimilability. With increasing Ore-A ratio, the tumbler index and the reduction index (RI) of the sinter first increase and then decrease, whereas the softening interval (ΔT) and the softening start temperature (T10%) of the sinter exhibit the opposite behavior; the reduction degradation index (RDI+3.15) of the sinter increases linearly, but the sinter yield exhibits no obvious effects. With increasing Ore-A ratio, the distribution and crystallization of the minerals are improved, the main bonding phase first changes from silico-ferrite of calcium and aluminum (SFCA) to kirschsteinite, silicate, and SFCA and then transforms to 2CaO·SiO2 and SFCA. Given the utilization of Ore-A and the improvement of the sinter properties, the Ore-A ratio in the high-limonite sintering process is suggested to be controlled at approximately 6wt%.

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Liu, D. hui, Liu, H., Zhang, J. liang, Liu, Z. jian, Xue, X., Wang, G. wei, & Kang, Q. feng. (2017). Basic characteristics of Australian iron ore concentrate and its effects on sinter properties during the high-limonite sintering process. International Journal of Minerals, Metallurgy and Materials, 24(9), 991–998. https://doi.org/10.1007/s12613-017-1487-1

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