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AssigneeCominco Ltd.
InventorsAlbert M. Vincze, Theodore J. Seymour, Patrick Culkeen, Nai-Yong Tang, Gerald P. Lewis, Paul Niessen, John V. Marlow
Estimating the term…
The strip is cast on a chilled casting surface of a rotating drum from a pool of the molten metal contained in a tundish having a graphite lip insert seated therein cooperating with, the casting surface adjacent to the tundish to form and contain the pool of the molten metal. The tundish preferably contains a feed chamber, a return chamber, and a diverting chamber, the feed chamber and the diverting chamber effectively removing turbulence from the molten feed and the return chamber having a vertically adjustable weir dividing the return chamber from the diverting chamber for controlling the surface level of the pool of molten metal in the diverting chamber and the lip insert and for diverting a flow of molten metal to the return chamber. A preferred lead alloy is a low antimony-lead alloy which is cast into strip and is subjected to a heat treatment to permit expansion and shaping in subsequent production of expanded mesh battery grids. The battery grids produced by the method have improved electrochemical properties such as corrosion resistance and resistance to growth.
A method for the casting of metal strip on a moving, chilled casting surface on substantially the upper half of a rotatable casting drum from a pool of molten metal comprising:
A method for the casting of metal strip on a moving, chilled casting surface on substantially the upper half of a rotatable casting drum from a melt of said metal comprising:
A method for the casting of metal strip on a moving, chilled casting surface on substantially the upper half of a rotatable casting drum from a pool of molten metal comprising:
An apparatus for direct casting of strip from a pool of molten metal in a tundish onto a chilled casting surface adjacent thereto on substantially the upper half of a rotatable casting drum comprising a tundish including a feed chamber, a return chamber and a diverting chamber having passageways communication said chambers in sequence, said tundish having an open front in proximity to a substantially vertical portion of the casting surface, a lip insert having a floor and opposed sidewalls adapted to be inserted into the tundish adjacent the tundish open front, said lip insert having an open front defined by the lip insert floor and sidewalls for cooperation with the casting surface to contain a pool of said molten metal having a surface level within the lip insert, said pool being in pressure communication with the diverting chamber whereby the surface level of the pool in the lip insert is the same as a surface level of molten metal in the diverting chamber, means for controlling the surface level of the pool of said molten metal in the diverting chamber to control the surface level in the lip insert, and means for moving the chilled casting surface upwardly through the pool of molten metal for the casting of metal on the chilled casting surface.
An apparatus for direct casting of strip from a pool of molten metal in a tundish onto a chilled casting surface on substantially the upper half of a rotatable casting drum adjacent thereto comprising a tundish including a floor, opposed sidewalls, rear wall, an open front spaced from said rear wall, a baffle wall in proximity to said open front having an opening for passage of molten metal thereby, and a lip insert having a floor and opposed sidewalls adapted to be inserted into the tundish adjacent the tundish open end, said lip insert having an open rear edge spaced from the tundish baffle wall for ingress of molten metal, and an open front defined by the lip insert floor and sidewalls for cooperation with a substantially vertical portion of the casting surface to contain a pool of said molten metal within the lip insert, means for controlling the surface level of the pool of said molten metal, and means for moving the chilled casting surface upwardly through the pool of molten metal for casting of metal on the chilled casting surface.
Dependencies are inferred from the claim text.