Method and apparatus for producing bright and smooth galvanized

Details Method and apparatus for producing bright and smooth galvanized Method and apparatus for producing bright and smooth galvanized

1997-10-14

1998-09-29

Kastler, Scott

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

266135, 266217, C22B 1900

Patent

active

058141260

ABSTRACT:
A method for cleaning and treating the walls of a kettle containing a molten metal such as zinc comprises injecting nitrogen or other gas into the molten metal through a reaction container. The reaction container may contain a second metal capable of forming an alloy with the molten metal. The reaction container is immersed in the molten metal adjacent the sidewall of the kettle and is moved around the peripheral edge of the kettle to disperse the second metal and the nitrogen into molten metal. The reaction container includes a gas feed pipe having a lower end with a plurality of gas outlets. An enclosure for containing the second metal surrounds the lower end of the feed pipe such that gas exiting the feed pipe bubbles upwardly through the enclosure to contact the second metal. In a preferred embodiment, the gas is nitrogen and the second metal is aluminum which form aluminum nitride in the molten metal.

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