Lining for a direct-current electric arc furnace

F - Mech Eng,Light,Heat,Weapons – 27 – D

Patent

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Details

F27D 1/04 (2006.01) C21C 5/52 (2006.01) F27B 3/08 (2006.01) F27D 11/10 (2006.01) H05B 7/06 (2006.01) F27B 3/12 (2006.01)

Patent

CA 2070197

A lining for a direct-current electric-arc furnace, in which at least part of that region of said furnace which receives the melt is provided on the inside with an electrically conductive, refractory brick lining and a ring-shaped current conductor, on its outside, constitutes the opposite pole to the upper electrode centrally extending into said furnace. The entire bottom area is covered with a refractory, insulating brick lining and a brick lining of graphite bricks is applied onto that brick lining in the radially outer wall region of the furnace. Located adjacent thereto in radially inward manner is an annular zone, comprising an electrically conductive, refractory brick lining. The central bottom area above said insulating brick lining is constituted by a monolithic ramming mass. Furthermore, the material of the wall of said furnace above said brick lining of graphite bricks largely corresponds to that of said insulating brick lining at the hearth bottom.

L'invention concerne un revêtement intérieur destiné à un four électrique à arc à courant continu, dans lequel au moins une partie de la région du four recevant la matière en fusion est revêtue intérieurement de briques réfractaires conductrices de l'électricité. Un conducteur en forme d'anneau, disposé à l'extérieur, constitue le pôle opposé à l'électrode supérieure plongeant au centre du four. Tout le fond est couvert d'un revêtement isolant en briques réfractaires, et un revêtement en briques de graphite est appliqué sur ce revêtement en briques réfractaires dans la partie radiale de la paroi extérieure du four. Adjacente à celle-ci, sur la partie radiale intérieure se trouve une zone annulaire comprenant un revêtement intérieur en briques réfractaires conductrices de l'électricité. La partie centrale du fond, au-dessus du revêtement isolant en briques réfractaires, est constituée d'un pisé monolithique. De plus, le matériau de la paroi du four au-dessus du revêtement en briques de graphite correspond largement à celui du revêtement isolant en briques de la sole du four.

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