Ultra-short-process low-carbon steelmaking system based on cold-bonded pellets and using method of ultra-short-process low-carbon steelmaking system

The invention discloses an ultra-short process low-carbon steelmaking system based on cold-bonded pellets and a using method, and belongs to the technical field of steelmaking. The ultra-short process low-carbon steelmaking system comprises an electric arc furnace, a flue gas preheating channel, a continuous feeding reduction channel and a metal material feeding system. One side of the electric arc furnace communicates with the smoke preheating channel, the upper portion of the end, away from the electric arc furnace, of the smoke preheating channel communicates with the continuous feeding reduction channel, and the tail of the end, away from the electric arc furnace, of the smoke preheating channel communicates with the metal material feeding system. Through combination of device structure arrangement and a use method, various problems existing in direct reduction iron produced by electric arc furnace steelmaking in the prior art are solved, for example, the problems that the reduction time of electric arc f