Patent ID: 7858020
Filing Date: 2010-12-28
Classification: C22B,F27D

Abstract:
1. A molten metal pumping and degassing system comprising: a submergible pump for pumping molten metal including a motor driven impeller rotatably carried on a shaft in an impeller chamber of a base, said base having an inlet opening and discharge opening in fluid communication with said impeller chamber, said impeller moving a stream of molten metal from said discharge opening of said base; and a molten metal flow powered device positioned in said stream of molten metal, said device being formed of nonmetallic heat-resistant material comprising a housing, a rotor supported for rotation by said housing, said rotor being configured and arranged to be powered by the stream of molten metal, a gas source which is a tank containing pressurized gas and a gas transfer conduit having an upper end engaged with said gas source and a lower end supported by said housing, said housing including a gas flow passageway leading from said lower end of said conduit from which gas is fed through an interior of said rotor or in contact with an exterior surface of said rotor, whereby said gas is mixed in said molten metal by said rotor that is powered by the stream of said molten metal.