Configuration of improving existing oxidation tank to recover anode oxidation solution and method
A technology of anodic oxidation and oxidizing solution, which is applied in the direction of anodic oxidation, electrolytic coating, surface reaction electrolytic coating, etc., can solve the problems of increasing equipment investment, achieve the effects of reducing investment cost, preventing large temperature rise, and improving processing efficiency
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[0064] In order to have a clearer understanding of the technical features, purposes and beneficial effects of the present invention, the technical solution of the present invention is described in detail below, but it should not be construed as limiting the scope of implementation of the present invention.
[0065] 1. Theoretical basis for the recovery of aluminum ions and sulfuric acid in the anodizing solution
[0066] When the aluminum alloy is oxidized, according to formula (3), part of the oxide film is dissolved, about 4Kg / T (400m 2 ) of aluminum is dissolved into the sulfuric acid oxidation solution, so that the oxidation solution contains Al 3+ 、H + and SO 4 2- , add ammonium sulfate, ammonium nitrate, ammonium chloride, potassium sulfate, potassium nitrate, potassium chloride to this oxidation solution, then the following reaction occurs:
[0067] Add ammonium sulfate to the oxidizing solution:
[0068] al 2 (SO 4 ) 3 +(NH 4 ) 2 SO 4 +12H 2 O=2NH 4 Al(SO ...
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