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Oxidation energy-saving method for recycling aluminium ions and sulphuric acid of oxidation tank and improving current density

A technology of current density and oxidation tank, which is applied in the field of aluminum product processing to achieve the effect of reducing the amount of dissolution, shortening the oxidation time, and reducing the energy consumption of oxidation

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

AI Technical Summary

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 need to be defrosted, so local adjustments must be made, and the defrosting system is set to defrost the entire cooling system. Frost, not just for titanium exchanger defrost

Method used

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  • Oxidation energy-saving method for recycling aluminium ions and sulphuric acid of oxidation tank and improving current density
  • Oxidation energy-saving method for recycling aluminium ions and sulphuric acid of oxidation tank and improving current density
  • Oxidation energy-saving method for recycling aluminium ions and sulphuric acid of oxidation tank and improving current density

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0141] Embodiment 1 (continuous production of aluminum alloy anodic oxidation)

[0142] Close No. 3 valve 03, No. 9 valve 09, open No. 1 valve 01, No. 2 valve 02, No. 4 valve 04, frequency conversion pump 4 and refrigerator, cool down the oxidation tank, and start production of the oxidation line;

Embodiment 2

[0143] Embodiment 2 (on-line recovery aluminum ammonium sulfate)

[0144] 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;

[0145] 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

[0146] Embodiment 3 (on-line recovery oxidation solution)

[0147] 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 oxidation energy-saving method for recycling aluminium ions and sulphuric acid of an oxidation tank and improving current density. The method comprises an oxidation solution circulating cooling step, an aluminium ion crystal product recycling step, a sulphuric acid oxidation solution recycling step, a gas stirring step, a defrosting step and a current density adjusting step; the current density adjusting step comprises the following steps: adjusting the flow of a variable frequency pump to be that the oxidation solution is circulated not more than six times every hour; adjusting the current density in an anodic oxidation tank. The invention provides an oxidation energy-saving method for recycling the aluminium ions and the sulphuric acid of the oxidation tank and improving the current density, the oxidation current density is improved, the oxidation time is shortened, the dissolving amount of oxidation films is reduced, and the oxidation energy consumption is reduced for the first time on the premise of blowing cold an oxidation film interface by fully utilizing a cathode cooling pipe.

Description

technical field [0001] The invention relates to the technical field of aluminum product processing, in particular to a method for recovering aluminum ions and sulfuric acid in an oxidation tank and improving current density for oxidation and energy saving. 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 diss...

Claims

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Application Information

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IPC IPC(8): C25D11/04C25D21/18C25D21/02C25D11/08C25D11/10
CPCC25D11/005C25D11/024C25D11/04C25D11/08C25D11/10C25D21/02C25D21/18
Inventor 熊晨凯熊映明
Owner FOSHAN SANSHUI XIONGYING INNOVATION CENT FOR ALUMINUM SURFACE TECH
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