Feed device for gravitationally depositing a granular...

B - Operations – Transporting – 22 – D

Patent

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Details

B22D 11/10 (2006.01) B22D 11/108 (2006.01)

Patent

CA 2155021

A feed device for gravitationally depositing a layer of granular material on the surface of a molten metal (2) in a continuous casting mould (1), including a hopper (7) containing said granular material (5) and connected to a feed pipe (8) which includes a sloping portion at an angle (.alpha.) which is neither zero nor 90~ relative to the horizontal, and has a permanently open lower discharge end (10) located above the surface of said metal (2) at a distance equal to or slightly greater than the desired layer thickness. In at least a part of said sloping portion, said feed pipe (8) consists of a straight tube (11), and the device includes an assembly for rotating said straight tube (11) about its own axis, and members (24, 25) for linking the ends (27, 28) of said straight tube (11) to the remainder of said pipe (8) to enable rotation.

L'invention concerne un dispositif d'alimentation pour le dépôt par simple gravité d'une couche d'un matériau granuleux sur la surface d'un métal liquide (2) dans une lingotière de coulée continue (1), comprenant une trémie (7) renfermant ledit matériau granuleux (5), et reliée à un conduit d'alimentation (8) comportant une portion inclinée selon un angle (.alpha.) non nul et non droit par rapport à l'horizontale, et dont l'extrémité inférieure (10) de décharge est ouverte en permanence et est située au-dessus de ladite surface du métal (2) à une distance (d) égale ou légèrement supérieure à une épaisseur de consigne de la couche, caractérisé en ce que, sur une partie au moins de ladite portion inclinée, ledit conduit d'alimentation (8) est constitué par un tube rectiligne (11), et en ce qu'il comprend des moyens pour imprimer un mouvement de rotation audit tube rectiligne (11) autour de son axe, et des moyens (24, 25) de connexion des extrémités (27, 28) dudit tube rectiligne (11) au restant dudit conduit (8) autorisant ledit mouvement de rotation.

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