Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1979-01-12
1979-12-04
Andrews, M. J.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 68R, C22B 902, C22B 908
Patent
active
041770650
ABSTRACT:
The disclosure teaches an improved method and apparatus for the treatment of liquids with gases and especially for use in the degassing and filtration of molten metal, especially aluminum, using an apparatus which employs a swirling tank reactor. The swirling tank reactor is in the form of a substantially cylindrical chamber and is characterized by having a liquid inlet at the top thereof and at least one gas inlet at the bottom of said substantially cylindrical chamber wherein at least either the liquid inlet or the gas inlet is positioned with respect to the wall of the cylidrical chamber for tangentially introducing either liquid or gas such that the liquid swirlingly flows from said liquid inlet to a liquid outlet. In a preferred embodiment for the degassing and filtration of molten metal, a filter-type medium is positioned beneath said molten metal inlet to filter the molten metal prior to delivering the same to a casting station. Dissolved gases and non-metallic inclusions are thereby abstracted and removed from the melt.
REFERENCES:
patent: 3311467 (1967-03-01), Polishouk et al.
patent: 4052199 (1977-10-01), Mangalick
Andrews M. J.
Swiss Aluminium Ltd.
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