Carbon-free sintering method and system for iron ore powder

The invention belongs to the technical fields of iron ore sintering and energy conservation and emission reduction, and particularly relates to a carbon-free sintering method and system for iron ore powder. The system comprises a grading and proportioning device, a mixing device, a belt type sintering device and a breaking device which are sequentially arranged, wherein the grading and proportioning device is used for grading raw materials, and proportioning all levels of the raw materials separately; the mixing device is used for mixing all levels of the raw materials obtained by the grading and proportioning device; the belt type sintering device is used for sintering the mixed materials obtained by the mixing device, and provided with a material distributing device and a bottom material paving device at a charging end, and the material distributing device is provided with an edge material paving chute; and the breaking device is used for breaking the sintered materials obtained by the belt type sintering d