SIMULTANEOUS MULTI-MODE GAS ACTIVATION DEGASSING DEVICE FOR CASTING ULTRACLEAN HIGH-PURITY METALS AND ALLOYS

摘要

An “in-line” device to continuously remove dissolved gasses from liquid metal is described. The device described herein may contain an apparatus to create a partial vacuum, one or more ultrasonic vibrators below the surface of the liquid metal to evolve gas bubbles within the metal, and a high-frequency vibrating metal plate which the fluid must pass over at a low depth. The device may be used to create high quality metals, including aluminum and aluminum alloy for a number of demanding applications such as pharmaceutical, semiconductor, foil, and aerospace applications including Aluminum-Lithium alloys.

主权项

1. A Multi-Mode Gas Activation degassing apparatus for removing dissolved gasses from liquid metal, the apparatus comprising:
an inlet chamber configured to contain a volume of liquid metal, the inlet chamber that receives liquid metal from a source of liquid metal; an outlet chamber in fluid communication with the inlet chamber, wherein the outlet chamber outputs degassed liquid metal; a flow control system that controls the flow of liquid metal into and out of the inlet and outlet chambers; a vacuum source that creates at least a partial vacuum in one or more of the inlet and outlet chambers; one or more ultrasonic probes placed inside the inlet chamber in a location which may be below the fluid level of the inlet chamber when the apparatus is in use; and a high-frequency vibrator configured to make a surface vibrate at a high frequency, the surface placed such that fluid must flow over the surface to transit between the inlet chamber and the outlet chamber of the apparatus.