Aluminum ion and sulfuric acid recovery in oxidation tank and energy-saving system and process for shortening oxidation pole distance
An oxidation tank, aluminum ion technology, applied in anodizing, electrolytic coating, surface reaction electrolytic coating, etc., to achieve the effect of shortening oxidation time, reducing dissolution, and reducing oxidation energy consumption
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Embodiment 1
[0174] Example 1 (cooling of anodizing liquid)
[0175] Close the No. 3 valve 03, No. 9 valve 09, open the No. 1 valve 01, No. 2 valve 02, No. 4 valve 04, No. 1 pump 4 and the refrigerator 2, the oxidizing liquid cooled by the refrigerator 2, from the No. 4 valve 04 Enter the mobile cathode cooling tube 11, blow directly to the surface of the aluminum alloy through the micropores of the mobile cathode cooling tube 11, and quickly transfer the oxidizing hot zone at the interface of the oxide film into the oxidizing solution; the oxidizing solution carrying this heat overflows to the overflow tank 1- 1. Then, through the No. 1 valve 01, the No. 1 pump 4, and the No. 2 valve 02, enter the titanium exchanger 3 for refrigeration, and then pass the No. 4 valve 04 to circulate into the moving cathode cooling tube 11 to complete the oxidation liquid cooling cycle.
Embodiment 2
[0176] Example 2 (Online recovery of ammonium aluminum sulfate)
[0177] 1. Open the third valve 03, close the second valve 02 and the ninth valve 09, and set the 30M 3 After the oxidation liquid is pumped to the reaction tank 5, open the second valve 02 and close the third valve 03; open the gas stirring valve 08 and start stirring; add ammonium sulfate at 2.5 times the weight of the aluminum ion concentration, and stir while adding; After the ammonium sulfate is added, continue to stir for 30 minutes and then close the eighth valve 08 and let it stand for 2 hours;
[0178] 2. Open No. 5 valve 05, the crystalline solid enters the centrifuge 6. Turn on centrifuge 6 for solid-liquid separation; open No. 10 valve 010, and spray the solids in centrifuge 6 repeatedly. When the pH value of the recovered liquid at the outlet of centrifuge 6 is greater than 4.5, close No. 10 valve 010 and stop spraying. Shower and centrifuge 6, recover aluminum ammonium sulfate by-product;
Embodiment 3
[0179] Example 3 (Online recovery of oxidizing liquid)
[0180] Turn on No. 6 valve 06, No. 7 valve 07 and No. 2 pump 8, and return the regenerated oxidizing solution to oxidation tank 1 to complete sulfuric acid recovery;
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