Dust removal trolley for replacing steel ladle refractory material

The dust removal trolley comprises two bottom beams, four vertical guide columns, four guide cylinders, a dust removal cover, a lifting oil cylinder and a telescopic pipe, the two bottom beams are installed on two steel rails through walking wheels respectively, and the upper portions of the two ends of each bottom beam are each provided with one vertical guide column; the lower ends of the four guide cylinders respectively sleeve the four vertical guide columns in a sliding manner, and the upper ends of the four guide cylinders are connected with the dust removal cover; a cylinder body of the lifting oil cylinder is connected with the bottom beam, a piston rod is connected with the dedusting cover or the guide cylinder, one end of the telescopic pipe is in butt joint with a dedusting pipeline in a workshop, and the other end is connected with the dedusting cover. The height of the dust removal cover is adjusted through the oil cylinder, the dust removal cover is lifted to a high position in the translation p