×

Method for dispersing gas into a molten metal

  • US 3,972,709 A
  • Filed: 04/23/1975
  • Issued: 08/03/1976
  • Est. Priority Date: 06/04/1973
  • Status: Expired due to Term
First Claim
Patent Images

1. A method of fluxing molten metal to remove dissolved gases and non-metallic impurities therefrom comprising the steps of:

  • a. providing a fluxing gas which at least partially includes a component that is non-reactive with the molten metal;

    b. supplying the gas to a rotatably mounted distributor located at a submerged zone beneath the surface of the molten metal at a positive pressure sufficient to prevent physical contact between the gas and the molten metal upstream of the distributor;

    c. emitting the gas from the distributor into the molten metal in a plurality of very small bubble jets extending in a direction oblique to radial lines extending perpendicular to the axis of rotation of the distributor, said jets having a tangential component which exerts a reaction force on the distributor; and

    d. rotating the distributor solely in response to said reaction force in a direction opposite to the direction of said bubble jets emitted therefrom, thereby substantially preventing bubble coalescence in the region of the distributor and thus effecting uniform and complete dispersion of the bubbles through the molten metal.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×