Continuous casting of lead alloy strip for heavy duty battery electrodes

摘要

An apparatus for direct casting of strip from a pool of molten metal includes a tundish having a feed chamber, a return chamber and a diverting chamber. A lip insert is inserted into the tundish and has an open front for cooperation with a casting surface. The apparatus includes a control mechanism configured to control the surface level of the pool of molten metal in the diverting chamber and in the lip insert, and a movement mechanism configured to move the casting surface upwardly through the pool of molten metal for the casting of metal on the casting surface. The casting surface is an aluminum surface of a cylindrical drum and has a coarse irregular surface formed thereon by biasing with crushed, angular silicon carbide or aluminum silicate.

主权项

1. An apparatus for direct casting of strip from a pool of molten metal comprising:
a rotatable casting drum having cooling passages for the flow of cooling fluid therethrough, the rotatable casting drum including a chilled casting surface; a tundish including a feed chamber, a return chamber and a diverting chamber having passageways in communication with said chambers in sequence, said tundish having an open front in proximity to a substantially vertical portion of the casting surface; a lip insert formed from graphite 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; a control mechanism configured to control the surface level of the pool of said molten metal in the diverting chamber to control the surface level in the lip insert; and a moving mechanism configured to move the chilled casting surface upwardly through the pool of molten metal for the casting of metal on the chilled casting surface, wherein the chilled casting surface is an outer circumferential surface of a cylindrical drum having a longitudinal axis about which the casting surface rotates and the said casting surface has material worn away creating a coarse irregular surface formed thereon by biasing with crushed, angular silicon carbide or aluminum silicate.