C - Chemistry – Metallurgy – 21 – C
Patent
C - Chemistry, Metallurgy
21
C
39/17, 39/80
C21C 5/40 (2006.01)
Patent
CA 1131019
Abstract The exhaust hood above a metallurgical furnace, where the furnace has an open top and is supported to move in a vertical arc beneath the hood from an upright position to tilt in one direction to a charging position and in the other direction to a tapping position, terminates in an opening which is usually circular and of a diameter such that it may receive gases and dust from the open top of the furnace when the furnace is tilted to one side or the other, as well as when it is vertical. A frame structure supported above the opening in the hood and arranged to be shifted horizontally relative to the hood has a panel suspended therefrom with operating means on the frame for swinging the panel in a vertical arc from a storage position where it is removed from the space between the top of the furnace and the hood downwardly to a level below the open end of the hood and then upwardly against the bottom of the hood to close the greater portion of the bottom of the hood and leave but a segment of the bottom open. Another operating means selectively moves the frame relative to the hood to determine which one of two segments to the right or left of the vertical axis about which the furnace tilts will be open. The panel is preferably comprised of louvers which are closed when the panel is in an operating position against the open end of the hood but which open when the panel is being moved through its arc of travel between an operating position against the bottom of the hood to its inoperative or storage position to thereby discharge from the panel accumulated dust and perhaps other solids.
329631
Grant Louis A.
Meyers Leo J.
Grant (louis A.) Inc.
Marks & Clerk
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