Energy-saving system and technique for recovering aluminum ions and sulfuric acid in oxidation tank and shortening oxidation electrode distance
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An oxidation tank and aluminum ion technology, applied in the direction of anodic oxidation, electrolytic coating, surface reaction electrolytic coating, etc., to achieve the effects of shortening oxidation time, reducing oxidation energy consumption, and reducing the amount of dissolution
Active Publication Date: 2017-05-31
FOSHAN SANSHUI XIONGYING INNOVATION CENT FOR ALUMINUM SURFACE TECH
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However, the defrosting system of this invention is set to only defrost the titanium exchanger, and in actual operation, the corresponding pipes, valves and pumps also nee
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Embodiment 1
[0175] Embodiment 1 (anodizing solution cooling)
[0176] Close No. 3 valve 03, No. 9 valve 09, open No. 1 valve 01, No. 2 valve 02, No. 4 valve 04, No. 1 pump 4 and refrigerator 2, the oxidizing liquid cooled by refrigerator 2, from No. 4 valve 04 Enter the moving cathode cooling tube 11, blow directly to the surface of the aluminum alloy through the micropores of the moving cathode cooling tube 11, and quickly bring the oxidation heat at the interface of the oxide film into the oxidizing solution; the oxidizing solution carrying these heat overflows to the overflow tank 1- 1. Then, through No. 1 valve 01, No. 1 pump 4, and No. 2 valve 02, it enters the titanium exchanger 3 for refrigeration, and then passes through No. 4 valve 04 to circulate into the mobile cathode cooling pipe 11 to complete the oxidizing liquid cooling cycle.
[0178] 1. Open No. 3 valve 03, close No. 2 valve 02, No. 9 valve 09, and turn 30M 3 After the oxidizing solution is pumped into the reaction tank 5, open the No. 2 valve 02, close the No. 3 valve 03; open the gas stirring No. 8 valve 08, and start stirring; add ammonium sulfate by 2.5 times the weight of the aluminum ion concentration, and stir while adding; After adding ammonium sulfate, continue to stir for 30 minutes and then close No. 8 valve 08, and leave standstill for 2 hours;
[0179] 2. Open the No. 5 valve 05, and the crystalline solid enters the centrifuge 6. Turn on the centrifuge 6 for solid-liquid separation; open the No. 10 valve 010 to repeatedly spray the solid in the centrifuge 6. When the pH value of the recovered liquid at the outlet of the centrifuge 6 is greater than 4.5, close the No. 10 valve 010 and stop spraying. Drench and centrifuge 6, reclaim aluminum ammonium sulfate by-product; ...
[0181] Open the No. 6 valve 06, the No. 7 valve 07 and the No. 2 pump 8, and send the regenerated oxidation solution back to the oxidation tank 1 to complete the recovery of sulfuric acid;
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Abstract
The invention discloses an energy-saving system and technique for recovering aluminum ions and sulfuric acid in an oxidation tank and shortening the oxidation electrode distance. By means of the system and the technique, the problems that during the existing oxidation process of aluminum alloy, the oxidation temperature of the oxidation interface is high, the dissolved quantity of an oxidation film is large, and oxidation energy consumption is high are solved. An energy-saving device for shortening the oxidation electrode distance comprises the oxidation tank, a refrigerator, a titanium exchanger, a first pump, an overflow tank and a pipeline, and further comprises a mobile oxidation polar plate device. The mobile oxidation polar plate device comprises a plurality of drive motors, a mobile positioning device, a mobile cathode cooling pipe, an anode conductive base and a negative pole conductive device. A master energy-saving oxidation basin/tank aluminum ion and sulfuric acid recovery system with the energy-saving device for shortening the oxidation electrode distance further comprises an aluminum ion crystal product recovery system, a sulfuric acid oxidized liquid recovery system, a gas stirring system and a defrosting system. The oxidation tank aluminum ion and sulfuric acid recovery technique adopting the master energy-saving system comprises the steps of cycle circulation of oxidized liquid, recovery of aluminum ion crystal products, recovery of the sulfuric acid oxidized liquid, gas stirring and defrosting.
Description
technical field [0001] The invention relates to the technical field of aluminum alloy processing, in particular to an energy-saving system and process for recovering aluminum ions and sulfuric acid in an oxidation tank and shortening the oxidation pole distance. Background technique [0002] After the aluminum alloy is anodized, an oxide film characterized by porosity is formed on the surface of the aluminum material, which must be sealed to ensure the physical and chemical properties of the anodized aluminum alloy products such as corrosion resistance, weather resistance, and wear resistance. , to obtain durable performance. [0003] Architectural aluminum anodizing solution refers to the bath solution used for anodizing aluminum alloy. When slotting, the concentration of H2SO4 in the anodic oxidation solution is between 160-200g / L, and there is no aluminum ion in the bath solution, which has a strong ability to dissolve the oxide film. Usually the anodizing time is 40-60...
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