Method for modifying iron ore raw material for direct reduction of fluidized bed

The invention discloses a method for modifying an iron ore raw material for direct reduction of a fluidized bed. The method mainly comprises the working procedures of crushing and ball-milling, mixing and wet-milling, extruding and granulating, low-temperature roasting, high-temperature consolidation, dust removal and the like, and specifically comprises the following steps: crushing and ball-milling an iron ore raw material to obtain fine iron ore powder, adding an additive and water, mixing and wet-milling, and then carrying out extruding and granulating to obtain a granulated material in a target size fraction range in one step, and carrying out low-temperature roasting and high-temperature consolidation to obtain high-temperature iron ore modified particles which are directly used for fluidized bed direct reduction. The granularity and the structure of the iron ore raw material are regulated and controlled through grinding and granulation, and the raw material adaptability and the reduction efficiency of