Abstract:
Donganshan Iron ore is rich in resources and reserves, but it is a typical refractory iron ore with low grade, complex composition, fine disseminated particle size and poor grinding characteristics.The existing beneficiation process has many problems, such as complex production process, low efficiency of coarse/fine classification and regrinding, poor effect of gravity separation and inefficient utilization of carbonate-containing iron ore and tailings.This study summarized the beneficiation technology progress of Donganshan iron ore in recent years, new technologies of "grinding-low intensity magnetic separation and high intensity magnetic separation-stirring grinding-reverse flotation" for poor hematite ore, "suspension magnetization roasting-magnetic separation" for carbonate bearing iron ore, and " preconcentration of magnetic separation-suspension magnetization roasting-magnetic separation" for the final flotation tailings were proposed, which provided a new idea for the efficient development and utilization of Donganshan iron ore.