Apparatus for removing foreign matter on hot-rolled steel strip

An apparatus for removing foreign substances from a hot-rolled steel strip, the foreign substances generated by friction between the strip and a side guide provided to guide a movement of the strip toward an entrance of a winder in a hot rolling process,

• wherein the apparatus comprises the side guide, the winder, and a reverse direction injection unit configured 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,
• the reverse direction injection unit comprises 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 width direction is narrower than an interval of the upper reverse direction injection nozzles located in both of edge areas along the width direction,
• the apparatus further comprising a lateral direction injection unit configured to inject high-pressure water between the side guide and the strip and to regulate a high-pressure water injection flow rate to increase a flow rate of high-pressure water to be injected in proportion to a threshold temperature at which sparks occur in the strip depending on a steel type thereof.

An apparatus for removing foreign substances from a hot-rolled steel strip, the foreign substances generated by friction between the strip and a side guide provided to guide a movement of the strip toward an entrance of a winder in a hot rolling process,

• wherein the apparatus comprises the side guide, the winder, and a reverse direction injection unit configured 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,
• the reverse direction injection unit comprises 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 width direction is narrower than an interval of the upper reverse direction injection nozzles located in both of edge areas along the width direction,
• the apparatus further comprising a forward direction injection unit configured to inject high-pressure water in the moving direction of the strip from an upstream side of the side guide toward the upper surface of the strip,
• wherein the side guide comprises a first side guide configured to support one side in the width direction of the strip, and a second side guide configured to support the other side in the width direction of the strip, and
• the forward direction injection unit is capable of biasedly injecting a high-pressure water injection flow rate to any one of the first side guide and the second side guide.