Closed furnace door of electric arc furnace

The utility model discloses a closed furnace door of an electric arc furnace, which comprises a mounting plate, the mounting plate is fixedly mounted on a furnace wall, a hydraulic column used for lifting a fixing mechanism is arranged in the mounting plate, the output end of the hydraulic column is fixedly connected with the fixing mechanism, the lower end of the mounting plate is fixedly connected with a door main body, and the door main body is fixedly connected with the door main body. A limiting plate is welded to the side face of the door body, limiting columns are slidably installed in grooves of the limiting plate and installed on the two sides of a ceramic layer, the ceramic layer is installed between a high-aluminum high-strength pouring layer and a steel plate in a clamped mode, and a circulating water pipe used for cooling is arranged in the door body. Due to the arrangement of the high-aluminum high-strength pouring layer, the ceramic layer and the steel plate, during working, the ceramic layer a