Patent ID: 7980292

Claim:
Crystalliser holding device for casting steel products from liquid steel, comprising: a tubular crystalliser defining a longitudinal casting direction X provided with a plurality of longitudinal channels for a passage of a first cooling fluid, a substantially ring-shaped casing arranged at a first end of said tubular crystalliser comprising a first chamber for feeding the first cooling fluid into said plurality of longitudinal channels, wherein the tubular crystalliser is monolithic and the longitudinal channels are made in its thickness, whereby said longitudinal channels are close to the inner walls of said crystalliser and provide a primary cooling of the liquid steel, wherein said first cooling fluid is introduced into said longitudinal channels from the top towards the bottom through said first chamber of the ring-shaped casing, wherein the inner wall of said crystalliser holding device and the external wall of the crystalliser provides at least one first re-ascent duct for the first cooling fluid, said first duct communicating with a second chamber for recycling the first fluid provided in said casing, wherein said longitudinal channels are in communication with said first duct in correspondence with a second end in correspondence of a foot of the tubular crystalliser, wherein there is provided at least one second duct communicating with a third chamber for feeding a second fluid provided in said casing.