Shroud for steel making electric-arc furnace

In a shroud for a steel making electric-arc furnace comprising insulating and dust proofing walls surrounding sides and a top of a steel making electric-arc furnace main body, and doors provided in a side wall of said sound insulating and dust proofing walls to allow a scrap bucket which is suspended to pass through from the side;

• the improvement which comprises an opening provided in the top wall of said sound insulating and dust proofing walls, a dust collecting suction duct on the top wall covering said opening and having an opening therein in registry with the opening in the top wall, said openings being of a minimum width enough for a suspending device of said scrap bucket to move transversely to the center of said electric-arc furnace main body, said suction duct having its suction port in communication with said openings of minimum width, and a movable top door provided over said dust collecting suction duct and adapted to open or close said openings of minimum width.