Iron-making method adopting hydrogen-rich coal-based rotary kiln direct reduction-side blown converter melting separation

The invention discloses an iron-making method adopting hydrogen-rich coal-based rotary kiln direct reduction-side blown converter melting separation, which comprises the following steps: S1, proportioning and mixing iron ore concentrate and bentonite according to the mass ratio of 100: (3-5) to prepare pellets; s2, coke oven gas and oxygen-enriched air are introduced from the discharging end of the rotary kiln, the pellets and the coal particles are added into the feeding end of the rotary kiln, the pellets, the coal particles and the coke oven gas are subjected to a gas-solid reaction in the rotary kiln, and high-temperature metallized pellets are obtained; and S3, the high-temperature metallized pellets are directly charged into a side-blowing melt separation furnace in a hot charging mode, a flux and a reducing agent are added into the furnace, oxygen-enriched air and fuel are sprayed into a transition area between a slag layer and molten iron, the final reduction and slag-iron separation process of the hi