Method for recycling alkali liquor in aluminum alloy section alkali corrosion production procedure

A technology for recycling aluminum alloy profiles and lye, applied in the direction of improving process efficiency, etc., can solve the problems of large water consumption, high temperature concentration of alkaline etching solution, and reducing the quality of profiles, and achieves reduction of environmental protection pressure, great economic benefits, The effect of long process flow

A technology for recycling aluminum alloy profiles and lye, applied in the direction of improving process efficiency, etc., can solve the problems of large water consumption, high temperature concentration of alkaline etching solution, and reducing the quality of profiles, and achieves reduction of environmental protection pressure, great economic benefits, The effect of long process flow

CN110670073AInactive Publication Date: 2020-01-10CHENGDU SUNSHINE ALUMINUM
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  • Method for recycling alkali liquor in aluminum alloy section alkali corrosion production procedure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment one: if figure 1 Shown, a kind of method for the recovery and reuse of lye in the alkaline corrosion production process of aluminum alloy profile, it comprises the following steps:

[0029] S1. Alkaline corrosion of aluminum alloy profiles, specifically including the following steps:

[0030] S11. Put the bath liquid composed of NaOH solution and organic acid sodium salt solution into the alkali etching tank, and raise the bath liquid temperature to 45~50°C;

[0031] S12. Put the aluminum alloy profiles to be alkali-etched into the alkali-etch tank, and NaOH solution removes the natural oxide film on the surface of the aluminum alloy profiles and slight scratches on the surface of the aluminum alloy profiles, so that the aluminum alloy profiles are exposed uniformly, freshly and ideally. surface, while producing a large amount of high value-added Al in the bath 3 + , organic acid sodium salt and Al 3 + Complexation reaction occurs to generate NaAlO 2 , ...

Embodiment 2

[0042] Embodiment two: if figure 1 Shown, a kind of method for the recovery and reuse of lye in the alkaline corrosion production process of aluminum alloy profile, it comprises the following steps:

[0043] S1. Alkaline corrosion of aluminum alloy profiles, specifically including the following steps:

[0044] S11. Put the bath liquid composed of NaOH solution and organic acid sodium salt solution into the alkali etching tank, and raise the bath liquid temperature to 45~50°C;

[0045] S12. Put the aluminum alloy profiles to be alkali-etched into the alkali-etch tank, and NaOH solution removes the natural oxide film on the surface of the aluminum alloy profiles and slight scratches on the surface of the aluminum alloy profiles, so that the aluminum alloy profiles are exposed uniformly, freshly and ideally. surface, while producing a large amount of high value-added Al in the bath 3 + , organic acid sodium salt and Al 3 + Complexation reaction occurs to generate NaAlO 2 , ...

Embodiment 3

[0055] Embodiment three: as figure 1 Shown, a kind of method for the recovery and reuse of lye in the alkaline corrosion production process of aluminum alloy profile, it comprises the following steps:

[0056] S1. Alkaline corrosion of aluminum alloy profiles, specifically including the following steps:

[0057] S11. Put the bath liquid composed of NaOH solution and organic acid sodium salt solution into the alkali etching tank, and raise the bath liquid temperature to 45~50°C;

[0058] S12. Put the aluminum alloy profiles to be alkali-etched into the alkali-etch tank, and NaOH solution removes the natural oxide film on the surface of the aluminum alloy profiles and slight scratches on the surface of the aluminum alloy profiles, so that the aluminum alloy profiles are exposed uniformly, freshly and ideally. surface, while producing a large amount of high value-added Al in the bath 3 + , organic acid sodium salt and Al 3 + Complexation reaction occurs to generate NaAlO 2 ...

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Abstract

The invention discloses a method for recycling alkali liquor in an aluminum alloy section alkali corrosion production procedure. The method comprises the following steps of S1, performing alkali corrosion on an aluminum alloy section; S13, after alkali corrosion is performed for 30-54 min, taking out an aluminum alloy section from a bath solution, and therefore completing alkali corrosion of the aluminum alloy section; S2, recycling a NaOH solution, wherein S21, the concentration of Al3+ in the bath solution is detected, when the concentration of Al3+ reaches 28 g / L, a pump is adopted for pumping the bath solution inside an alkali corrosion groove into a crystal separation groove; S23, the pump is adopted for pumping the supernate NaOH solution into a recycling barrel, then, the NaOH solution inside the recycling barrel is poured into the alkali corrosion groove to continue to be used for production, closed loop production is formed, and therefore the NaOH solution is recycled; S3, aluminum ions are recycled. The method has the beneficial effects that the section surface quality stability is improved, consumption of sodium hydroxide is lowered, later sewage treatment difficulty islowered, and economic benefits are improved.

Description

technical field [0001] The invention relates to a method for recovering and reusing alkali liquor in the alkali corrosion production process of aluminum alloy profiles. Background technique [0002] With the improvement of the production scale and product quality of my country's architectural aluminum profiles, the surface treatment process, quality and equipment have been in line with the international advanced level; with the increasing shortage of resources and energy, the continuous strengthening of environmental protection awareness and the optimization and reorganization of industrial production, aluminum profiles The production process has been developed in the direction of low energy consumption, low pollution, and green environmental protection. Under the premise of ensuring the performance, the impact of the anodic oxidation process on the environment is minimized. [0003] Before the chemical pretreatment of anodic oxidation surface treatment, it is necessary to ca...

Claims

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Application Information

Patent Timeline
10 Jan 2020
Publication
CN110670073A
IPC
C23F1/36; C23F1/46; C22B7/00; C22B21/00
CPC
C22B7/006; C22B21/0023; C23F1/36; C23F1/46; Y02P10/20
Inventors
廖健