Controlling the emissions of PM2.5 (particulate matters with aerosol dynamic diameter =2.5 m) from sintering flue gas is of great significance for green iron and steel making. This investigation mainly focused on the physicochemical emission profile of PM2.5 and proposed some suggestions for abating PM2.5 emissions as well. Results showed that PM2.5 emissions were characterized by high concentrations in specific sintering areas, ie, sintering stage-4 to stage-5, which corresponded to the latter part of the whole sintering process, while considerably lower emission concentrations were exhibited in the early stages of sintering, ie, stage-1 to stage-3. The chemical composition of PM2.5 from the early stages was characterized by high contents of Fe, Ca, Al and Si, while in the later stages the PM2.5 was characterized by high concentrations of K, Pb, Cl and S. Consequently, the PM2.5 emitted from the later part of the sintering process posed a greater threat to the environment because of its high content of heavy (alkali) metals, and it was difficult to remove using electrostatic precipitators due to its high resistivity. Based on these properties, in-bed and end-of-pipe emission reduction suggestions were proposed. Taking the properties of PM2.5 into consideration, strengthening the absorption capacity of the sintering bed by spraying binder solutions can be a potential in-bed reduction technique, with its main purpose being to trap the PM2.5 from the flue gas when it passes downwards through the sintering bed. As for the high resistivity of PM2.5, spraying conditioning reagents into the flue gas from the later stages of the sintering process to lower the resistivity of PM2.5 is a potential end-of-pipe measure for efficient PM2.5 reduction, with its main purpose being to regulate the resistivity of PM2.5 to the required range for electrostatic precipitators. CITATION:Ji, Z, Fan, X, Gan, M, Chen, X, Huang, X, Lv, W, Wang, G and Jiang, T, 2019. Physico-chemical profile of PM2.5 emitted from the iron ore sintering process and emission reduction suggestions, in Proceedings Iron Ore 2019, pp 537543 (The Australasian Institute of Mining and Metallurgy: Melbourne).