Development of roasting-acid leaching-magnetic separation …
Fine-grained iron oxide ore is a kind of enormous refractory iron ore worldwide. Reduction roasting-magnetic separation is a common processing technique to upgrade and recover iron from this kind of iron ore, and coke/coal is the typical reducing agent used in the roasting process (Faris et al. 2017 ; Quast 2018 ; Roy et al. 2020 ).