Raw material suitable for direct reduction ironmaking of fluidized bed and preparation method of raw material

The invention discloses a raw material suitable for fluidized bed reduction ironmaking and a preparation method, the raw material is a nearly spherical particle material with a particle size of 0.2-5 mm, the particle material has an inner core and a coating layer structure, and the thickness of the coating layer is 0.01-0.1 mm; the inner core is composed of iron ore concentrate and a binder; and the coating layer is composed of a coating agent and a binder. The preparation method comprises the following steps: uniformly mixing and preparing the raw materials of the inner core and the coating layer according to respective proportions, pre-granulating the mixed powder of the inner core, carrying out granulation and surface coating pretreatment on the granules to form a coating thin layer, and carrying out high-temperature roasting solidification, so that the strength of the roasted granules is guaranteed, the strength requirement in a fluidized bed reactor can be met, and the service life of the fluidized bed r