The invention belongs to the technical field of
blast furnace ironmaking, and particularly discloses a
solid fuel replacement and
hydrogen-rich injection method in a
hydrogen-rich
carbon cycle oxygen blast furnace mode. According to the method, the quantitative replacement relation between the decarburized gas injection amount and the
coke consumption reduction amount is established, a composite injection plan of'gas first and
powder second and cooperative climbing 'is implemented, and
hydrogen-rich gas enhanced injection is planned, so that the
solid fuel consumption and the carbon emission are systematically reduced. The method specifically comprises the following three steps: establishing a fuel replacement reference, implementing decarburized gas dominant replacement and pulverized
coal collaborative replacement in stages, planning hydrogen-rich gas injection reinforcement, and controlling key injection parameters and crude
fuel quality at the same time. According to the method, the
coke ratio is reduced by more than or equal to 60kg / t, the
solid fuel consumption is reduced by more than or equal to 15%, the CO2 emission is reduced by more than 2%, the operation path is clear and controllable, the furnace condition is stable and smooth, the technical
extensibility is high, and the method is suitable for industrial application of a large
blast furnace HyCROF mode.