Device and method for descaling a workpiece in motion

A device (10) for descaling a workpiece (12), preferably a hot rolled stock, in motion in a movement direction (X) in relation to the device (10), comprising at least one rotor head (14) rotatable about an axis of rotation (R), to which multiple jet nozzles (16) are attached, wherein a liquid (18), in particular water, can be dispensed from the jet nozzles (16) onto the workpiece (12) at an angle of attack (α) inclined with respect to an orthogonal on a surface (20) of the workpiece (12),

• characterized in that the jet nozzles (16) are attached to the rotor head (14) in such a way that during rotation of the rotor head (14) about its axis of rotation (R), the spraying direction (S) of the liquid (18) dispensed from the jet nozzles (16), with respect to a projection in a plane parallel to the surface (20) of the workpiece (12), is aligned permanently opposed, i.e., at a spraying angle (β) between 170° and 190°, preferably at a spraying angle (β) of 180°, to the movement direction (X) of the workpiece (12) and at the same time the angle of attack (α) for all jet nozzles (16) remains constant, and a collection unit (22) is provided, which is arranged upstream from the rotor head (14) with respect to the movement direction (X) of the rolled stock in such a way that both the liquid (18) dispensed from the jet nozzles (16), after rebounding from the surface (20) of the workpiece (12), and also the scale removed by means of the liquid (18) from the surface (20) of the workpiece (12) are introducible in a targeted manner into the collection unit (22).