Method and Apparatus for Cleaning or Descaling of Thin Slabs and Strips in a Hot Strip Rolling Mill Train, Strip Treatment Installations or the Like

A method of descaling of thin slabs in a hot strip rolling mill train or strips in a strip treatment installation by spraying a liquid gas onto a to-be descaled surface of the strip slabs or strips,

• characterized in that
• the liquid gas is a mixture of cryogens with a carrier medium such as compressed air;
• and that a liquefied cryogen, if necessary, together with the carrier medium and scale particles are aspirated from the thin slabs or strips.

An apparatus for carrying out the method of claim 1, comprising one or more spray booms for spraying a liquid gas on an upper or lower side of thin slabs or strips,

• characterized in that
• the liquid gas is a mixture of cryogens with a carrier medium such as compressed air, and that a suction device is provided for aspirating the gas and scale particles.