Oscillating descaler and method for descaling a semi-finished metallurgical product

An oscillating descaler for semi-finished metallurgical products comprising a passageway delimited by an input section and an opposite output section, said passageway being crossable by at least one semi-finished metallurgical product to be descaled according to a crossing direction oriented from said input section to said output section, said descaler comprising at least one manifold for a pressurized fluid, said manifold being extended according to a longitudinal direction defined between a first longitudinal end and a second opposite longitudinal end of said manifold, said manifold being arranged so that said longitudinal direction is not parallel to said crossing direction, said manifold being provided with at least one nozzle for spraying a jet of said fluid according to a spray direction which is coaxial to an outlet hole of said nozzle, said spray direction being oriented from said manifold towards said passageway so as to intercept said semi-finished product to be descaled, said descaler being provided with motor means for generating a rectilinear oscillating motion of said jet along said longitudinal direction, said nozzle being oriented so that said spray direction is inclined towards said input section and inclined towards one or the other of said first and second longitudinal ends of said manifold, wherein said jet has a laminar shape and is oriented so as to intercept said semi-finished product to be descaled according to a rectilinear trace substantially parallel to said crossing direction.