Furnace door of submerged arc furnace

The utility model relates to the technical field of submerged arc furnaces, in particular to a furnace door of a submerged arc furnace, which comprises a sealing door, a slag stopping door, a telescopic cylinder and a furnace opening formed on a furnace body in a protruding manner, the top of the sealing door is hinged to the top of the furnace opening, crank arms are fixedly connected to two sides of the top of the sealing door, a connecting column is fixedly connected between the two crank arms, and the connecting column is connected with the telescopic cylinder. The connecting column is movably sleeved with a connector, a cylinder body of the telescopic cylinder is hinged to the furnace body, a piston rod of the telescopic cylinder is fixedly connected to the connector, the bottoms of the two sides of the sealing door are fixedly connected with lug plates, connecting shafts are rotationally connected into the two lug plates, and the opposite ends of the two connecting shafts are jointly and fixedly connect