After anodizing aluminium profiles,sealing reaction with the Ni-F systematic low-temperature sealing agent will go on continuously and slowly after sealing, i.

It is shown that the cold sealing process is attributed to Fluorides and that other additives in the cold sealing solution neutralize positive charges, become incorporated in the film and promote the absorption of positive ions such as Nickel and aluminium ions, which are coprecipitated as hydrates with a rapid closing of p.

Novel nickel free cold sealing K 2ZrF 6 based of anodized aluminum was developed.

Profiles end powder frost after cold sealing for aluminium alloy profiles is generaed by over sealing of anodized film.

For the coal dust fired the movable hearth box annealing furnace is actually used in regular production,and a new energy ecomomization technique,that is,the high temperature back up technique (including the low temperature one)has been proposed.

The author describes the fluidized bed calciner cooler in the Alcoa process AlFs3 technology developed by American Aluminum Industry Corporation,points out the drawbacks of the sealing structure,and proposes using the new structure with compressed air for high temperature sealing,a revamping measure based.