| 摘要 |
A method of and apparatus for treating molten metal to achieve effective rem oval of such unwanted inclusions as gases. alkali metals , entrained solids, and the like. The method comprises introducing molten meta l into a trough, such as the trough provided between a m elting furnace and a casting machine, providing at least one mechanically movable g as injector submerged within the metal in the trough and injecting a gas into the metal in a part of the trough forming a treatment z one through the injector(s) to form gas bubbles in the m etal while moving the injector(s) mechanically to minimize bubble size and maximi ze distribution of the gas within the metal. The injecto rs are preferably rotated and comprise a rotor body having a cylindrical side s urface and a bottom surface, at least three openings in the side surface spaced symmetrically around the rotor body, at least one opening in the bottom surface, and at least one internal passageway for gas delivery and an internal structure for interconnecting the openings in the s ide surface, the openings in the bottom surface and the internal passageway. The internal structure is adapted to cause gas bubbles emanating from the internal passageway to break up into finer bub bles and to cause a metal/gas mixture to issue from the openings in the side surf ace in a generally horizontal and radial manner.
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