Patent ID: 7276205
Filing Date: 2007-10-02
Classification: B22D,C21C

Abstract:
1. Injection device for the introduction of a fluid into a metallurgical vessel having a refractory lining, the device being removably insertable in the lining and including a refractory first body comprising a refractory first material fittingly assembled to a refractory second body comprising a refractory second material, the first material less permeable to the fluid than the second material, the first and second bodies each comprising a contact surface adapted to contact molten metal and a plurality of fluid passages extending from a fluid feeder to the contact surface, the fluid passages of the second body having a higher relative flow resistance than the fluid passages of the first body, the fluid passages of the first body being independent from the fluid passages of the second body, and the fluid passages of the first body comprising at least one geometry selected from the group consisting of slots and bores.