Tubular water-cooled jacket for furnaces

A tubular water-cooled jacket for furnaces, comprising a tubular member having a plurality of axial apertures formed therein so as to extend axially thereof and a plurality of transverse apertures each formed therein so as to bring at least two of said axial apertures into open communication with each other, said plurality of axial apertures and said plurality of transverse apertures cooperating with one another to define a plurality of fluid passageways for cooling water isolated from one another;

• wherein said tubular member includes a tubular metal wall, castable refractory disposed on the inner peripheral surface of said metal wall, and a plurality of caster pins for securing said castable refractory to said metal wall, each of said caster pins being threaded at one end into said metal wall and embedded at the other end in said castable refractory, said caster pins being composed of the same kind of metal as said wall.

A water-cooled jacket extending in an axial direction and having a substantially annular cross-section, comprising:

• a plurality of U-shaped fluid passageways circumferentially spaced from one another, each of said U-shaped fluid passageways including a first axial aperture adapted to receive cooling water entering said water-cooled jacket, a second axial aperture substantially parallel to said first axial aperture and having a length substantially equal to the length of said first axial aperture, and a transverse aperture, substantially perpendicular to and fluidically communicating said first and second axial apertures.