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(?T) and the softening start temperature(T_(10%)) 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·SiO_2 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%. 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, With increasing Ore-A ratio, the tumbler index and the reduction index (RI) of the sinter first increase and then decrease, while the softening interval (? T ) and the softening start temperature (T_ (10%)) 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. -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 2 CaO · SiO 2 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 6% by weight.