| 摘要 |
<p>A method and apparatus for the casting of molten metals and particularly molten lead and wide-freezing range lead alloys as strip for use in battery grids. The strip (10) is cast on a chilled casting surface of a rotating drum from a pool of said molten metal contained in a tundish (14) having a graphite lip insert seated therein cooperating with the casting surface adjacent to the tundish (14) to form and contain the pool of said molten metal. The tundish (14) preferably contains a feed chamber, a return chamber, and a diverting chamber, said feed chamber and the diverting chamber effectively removing turbulence from the molten feed and said 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 (10) and is subjected to a heat treatment (98) 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 of growth.</p> |
