According to an embodiment of the invention, a descaling system is provided that includes multiple descaling headers, a common pipe, a connection pipe, a pump, a drive device, a branch pipe, a valve, and a control device. The multiple descaling headers are provided in a rolling line. The common pipe is connected to each of the multiple descaling headers. The connection pipe is connected to the common pipe. The pump is connected to the connection pipe and supplies high pressure water to each of the multiple descaling headers via the connection pipe and the common pipe. The drive device controls the driving of the pump. The branch pipe is connected to the connection pipe. The valve is provided in the branch pipe and controls the opening/closing of the branch pipe. The control device includes a data collector, a pressure calculator, a pump controller, and a protector. The data collector collects common pipe pressure information indicating the pressure inside the common pipe, rolling material position information indicating the position on the rolling line of a rolling material, and rolling material property information indicating a material property of the rolling material. The pressure calculator calculates the pressure inside the common pipe to satisfy the desired scale removal performance for the rolling material based on the common pipe pressure information, the rolling material position information, and the rolling material property information. The pump controller calculates the operation pattern of the pump to maintain the calculated pressure inside the common pipe and inputs the operation pattern to the drive device. The protector calculates the operation amount of the valve based on the operation pattern and controls the opening/closing of the valve according to the operation amount. Thus, a descaling system, a control device of the descaling system, and a method for controlling the descaling system are provided, in which higher energy conservation is realized and the descaling system has a long life while maintaining the scale removal performance of the descaling system.

The descaling device (100) of the interior of a tube (1) comprises a supporting structure (9), a conveyor (2) for conveying the tube (1) with an inclinable stretch to arrange the tube in an inclined position by an angle with respect to the horizontal plane, a lance (3) with nozzles (4) to spray a fluid inside the tube (1) to carry out the operation of descaling the inner surface. The lance (3) is fixed to guides (7) above the conveyor (2) in an inclined position with respect to the horizontal plane, and may axially slide within the tube (1) during the descaling operation by spraying water into the tube.

The descaling device (100) of the interior of a tube (1) comprises a supporting structure (9), a conveyor (2) for conveying the tube (1) with an inclinable stretch to arrange the tube in an inclined position by an angle with respect to the horizontal plane, a lance (3) with nozzles (4) to spray a fluid inside the tube (1) to carry out the operation of descaling the inner surface. The lance (3) is fixed to guides (7) above the conveyor (2) in an inclined position with respect to the horizontal plane, and may axially slide within the tube (1) during the descaling operation by spraying water into the tube.

An oscillating descaler (1) for semi-finished metallurgical products comprises:a passageway (2) delimited by two opposite input and output sections (3, 4) crossable by a semi-finished product (10) to be descaled according to a rectilinear crossing direction (X) oriented from the input section (3) to the output section (4),a manifold (20) for a pressurized fluid extended according to a longitudinal direction (Y) defined between first and second longitudinally opposite ends (21, 22), arranged so that the longitudinal direction (Y) is not parallel to the crossing direction (X),at least one nozzle (30) for spraying a jet (31) according to a spray direction (Z) which is coaxial to a hole (30a) of the nozzle (30) and inclined towards the input section (3) and towards one of the ends (21, 22) of the manifold (20, 20b),motor means (M) for generating a rectilinear oscillating motion of the jet (31) along the longitudinal direction (Y).

An oscillating descaler (1) for semi-finished metallurgical products comprises:a passageway (2) delimited by two opposite input and output sections (3, 4) crossable by a semi-finished product (10) to be descaled according to a rectilinear crossing direction (X) oriented from the input section (3) to the output section (4),a manifold (20) for a pressurized fluid extended according to a longitudinal direction (Y) defined between first and second longitudinally opposite ends (21, 22), arranged so that the longitudinal direction (Y) is not parallel to the crossing direction (X),at least one nozzle (30) for spraying a jet (31) according to a spray direction (Z) which is coaxial to a hole (30a) of the nozzle (30) and inclined towards the input section (3) and towards one of the ends (21, 22) of the manifold (20, 20b),motor means (M) for generating a rectilinear oscillating motion of the jet (31) along the longitudinal direction (Y).

A cold state metal plate strip surface treatment system and a treatment method thereof, used for high-pressure jet-flow descaling and rinsing metal plate strips, includes a high-pressure jet-flow descaling section. A tension unit and a stabilizing roller are provided in front of the high-pressure jet-flow descaling section, and a stabilizing roller, a compressed air drying device and a tension unit are provided after the high-pressure jet-flow descaling section; at least one descaling unit is provided in the high-pressure jet-flow descaling section, wherein the descaling unit includes first and second bending rollers used for bending a metal plate strip, and correspondingly first and second jet-flow descaling nozzles, and first and second rinsing nozzle sets. The present invention can be used for replacing the prior cold state continuous descaling pickling sets for metal plate strip, to meet the requirements of the rapidness and continuousness of modern cold-state metal plate strip, without affecting the original productivity of the production line. The present invention not only performs the synchronous and continuous descaling for both obverse and reverse surfaces of the metal plate strips, but also meets the requirements for the plate surfaces in the following procedure.

A cold state metal plate strip surface treatment system and a treatment method thereof, used for high-pressure jet-flow descaling and rinsing metal plate strips, includes a high-pressure jet-flow descaling section. A tension unit and a stabilizing roller are provided in front of the high-pressure jet-flow descaling section, and a stabilizing roller, a compressed air drying device and a tension unit are provided after the high-pressure jet-flow descaling section; at least one descaling unit is provided in the high-pressure jet-flow descaling section, wherein the descaling unit includes first and second bending rollers used for bending a metal plate strip, and correspondingly first and second jet-flow descaling nozzles, and first and second rinsing nozzle sets. The present invention can be used for replacing the prior cold state continuous descaling pickling sets for metal plate strip, to meet the requirements of the rapidness and continuousness of modern cold-state metal plate strip, without affecting the original productivity of the production line. The present invention not only performs the synchronous and continuous descaling for both obverse and reverse surfaces of the metal plate strips, but also meets the requirements for the plate surfaces in the following procedure.

Device for the removal of scale from the surface of a metal product (11) by delivering water under pressure, said device comprising a box-like structure (20) defining an internal space (22) for the passage of the water under pressure, connected to an exit fissure having a gap (23) with a gap value of less than a millimeter, the gap extending continuously for at least the entire width of the metal product (11).

Device for the removal of scale from the surface of a metal product (11) by delivering water under pressure, said device comprising a box-like structure (20) defining an internal space (22) for the passage of the water under pressure, connected to an exit fissure having a gap (23) with a gap value of less than a millimeter, the gap extending continuously for at least the entire width of the metal product (11).

Provided is an apparatus of removing foreign substances from a hot-rolled steel strip, including a reverse direction injection unit provided to inject high-pressure water in the reverse direction of a moving direction of the strip toward the strip moving to the entrance of the winder by the side guide, wherein the reverse direction injection unit includes a plurality of upper reverse direction injection nozzles arranged along a width direction of the strip to inject high-pressure water to an upper surface of the strip, and the plurality of upper reverse direction injection nozzles is arranged such that an interval of the upper reverse direction injection nozzles located in a central area along the above arrangement direction is narrower than an interval of the upper reverse direction injection nozzles located in both edge areas.