Method of continuous steel casting

Details Method of continuous steel casting Method of continuous steel casting

B - Operations, Transporting

22

D

B22D 11/108 (2006.01) B22D 11/10 (2006.01) B22D 11/111 (2006.01) B22D 41/54 (2006.01)

Patent

CA 2454946

A method for continuous casting of steel, characterized in that use is made of a combination of a mold powder having a fluorine content of less than 3 wt % and exhibiting a viscosity at 1300 ~C of 4 to 10,000 poise and an immersion nozzle comprising a refractory material containing alumina as a primary component (specifically, an alumina refractory and/or alumina-carbon refractory). The method allows the stable production of a clean cast steel product with little melting loss and with no deposit of alumina, also in the case when an immersion nozzle comprising a refractory material containing alumina as a primary component is used.

L'invention concerne un procédé de coulée en continu d'acier caractérisé en ce qu'il consiste à utiliser une combinaison comprenant une poudre de lingotière possédant une teneur en fluorine inférieure à 3 % en poids et présentant une viscosité à 1300 ·C comprise entre 4 à 10'000 poises, ainsi qu'une buse d'immersion comprenant un matériau réfractaire renfermant de l'alumine comme composant principal (notamment, un matériau réfractaire à base d'alumine et/ou d'alumine-carbone). Le procédé permet d'obtenir une production stable de produit en acier coulé propre avec une faible perte au feu et sans dépôt d'alumine, même dans le cas où on utilise une buse d'immersion renfermant un matériau réfractaire comprenant de l'alumine comme composant principal.

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