During operation, the drive device installed above the load trolley drives the trolley to move in a plane along the track. When it reaches the predetermined grid slag removal position, the gripper (arc slag removal tooth rake) moves downward under the traction of the wire rope. When the tooth harrow reaches the bottom of the grille, the control system turns off the arc tooth harrow, and at the same time raises the slag removing tooth harrow to start slag removal. When the tooth harrow reaches the predetermined lifting height, the load trolley is instructed to move to the designated point for unloading.

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