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