Process and flotation box for inclusion removal

摘要

A process and apparatus are disclosed for removing inclusions and inclusion clusters from a molten metal or alloy stream prior to casting. In the process, the molten metal is passed through a flotation box having a primary chamber and a secondary chamber located within the primary chamber. The primary chamber is provided with entry and exit portions, one on each side of the secondary chamber so that the stream of molten metal or alloy is directed to flow into the primary chamber, flowing beneath the secondary chamber and out the exit portion. Inclusions and inclusion clusters float to the surface of the molten metal or alloy in the secondary chamber prior to the exiting of the molten metal or alloy stream from the primary chamber through the exit portion for supply to a casting station.