MIXING EDUCTOR NOZZLE AND FLOW CONTROL DEVICE

摘要

Techniques are disclosed for reducing macrosegregation in cast metals. Techniques include providing an eductor nozzle capable of increasing mixing in the fluid region of an ingot being cast. Techniques also include providing a non-contacting flow control device to mix and/or apply pressure to the molten metal that is being introduced to the mold cavity. The non-contacting flow control device can be permanent magnet or electromagnet based. Techniques additionally can include actively cooling and mixing the molten metal before introducing the molten metal to the mold cavity.

主权项

1. A system comprising:
a feed tube couplable to a source of molten metal; a primary nozzle located at a distal end of the feed tube, wherein the primary nozzle is submersible in a molten sump for delivering the molten metal to the molten sump; and a secondary nozzle submersible in the molten sump and positionable adjacent the primary nozzle, wherein the secondary nozzle includes a restriction shaped to generate a low pressure area to circulate the molten sump in response to the molten metal from the source passing through the restriction.