Energy-saving device and process for oxidation tank aluminum ion and sulfuric acid recycling and oxidation liquid corrosion inhibition

An energy-saving device and technology of oxidizing liquid, applied in the direction of anodizing, electrolytic coating, surface reaction electrolytic coating, etc., to achieve the effect of reducing resistance 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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • Energy-saving device and process for oxidation tank aluminum ion and sulfuric acid recycling and oxidation liquid corrosion inhibition
  • Energy-saving device and process for oxidation tank aluminum ion and sulfuric acid recycling and oxidation liquid corrosion inhibition
  • Energy-saving device and process for oxidation tank aluminum ion and sulfuric acid recycling and oxidation liquid corrosion inhibition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] Embodiment 1 (continuous production of aluminum alloy anodic oxidation)

[0120] 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, cool down the oxidation tank, and start production of the oxidation line;

Embodiment 2

[0121] Embodiment 2 (on-line recovery aluminum ammonium sulfate)

[0122] 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, open the No. 2 valve 02 and close the No. 3 valve 03; open the gas stirring No. 8 valve 08 and start stirring; add ammonium sulfate according to 2.5 times the weight of the aluminum ion concentration, and stir while adding; After the ammonium has been added, continue stirring for 30 minutes and then close No. 8 valve 08 and leave it for 2 hours;

[0123] 2. Open No. 5 valve 05, and the crystalline solid enters the centrifuge. Turn on the centrifuge for solid-liquid separation; open No. 10 valve 010 to repeatedly spray the solids in the centrifuge. When the pH value of the recovered liquid at the outlet of the centrifuge is greater than 4.5, close No. 10 valve 010 to stop spraying and centrifugation machine, recycling ammonium aluminum sulfate by-product;

Embodiment 3

[0124] Embodiment 3 (on-line recovery oxidation solution)

[0125] Open No. 6 valve 06, No. 7 valve 07 and No. 2 pump 8, and send the recovered and regenerated oxidation solution back to the oxidation tank to complete the recovery of sulfuric acid;

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Abstract

The invention discloses an energy-saving device and process for oxidation tank aluminum ion and sulfuric acid recycling and oxidation liquid corrosion inhibition. The process comprises an oxidization liquid cyclic cooling step, an aluminum ion crystal product recycling step, a sulfuric acid oxidization liquid recycling step, a gas stirring step and a defrosting step; the aluminum ion crystal product recycling step includes that oxidization liquid is guided into a reaction tank, ammonium aluminum sulfate crystals are precipitated out after ammonium sulfate is added into the reaction tank, and then materials in the reaction tank are guided into a centrifugal machine to be centrifuged so that solid and liquid after solid-liquid separation can be acquired; and the sulfuric acid oxidization liquid recycling step includes that oxidization liquid after crystallization treatment is collected, and is conveyed to an anodic oxidization tank to be cyclically used after being subjected to regeneration treatment. The energy-saving device and process for oxidation tank aluminum ion and sulfuric acid recycling and oxidation liquid corrosion inhibition are provided, by extracting aluminum in the oxidization liquid, sulfuric acid is recycled, the resistance of the oxidization liquid is reduced, a corrosion inhibition agent is added in the oxidization liquid, oxidization energy conservation is achieved by reducing the dissolving amount of an oxidization film, and more than 20% of energy is saved.

Description

technical field [0001] The invention relates to the technical field of aluminum product processing, in particular to an oxidation bath aluminum ion and sulfuric acid recovery and an oxidation liquid corrosion inhibition and energy-saving device and process. 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, anodizing solution H 2 SO 4 The concentration is between 160-200g / L, there is no aluminum ion in the bath, and the ability to dissolve the oxide film is strong. Usually the anodizing time is 40-60 minutes, and the amount of dis...

Claims

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Application Information

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IPC IPC(8): C25D11/04C25D21/18C25D21/02C25D11/08C25D11/10
CPCC25D11/005C25D11/04C25D11/08C25D11/10C25D21/02C25D21/18
Inventor 熊晨凯熊映明
Owner FOSHAN SANSHUI XIONGYING INNOVATION CENT FOR ALUMINUM SURFACE TECH
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