Process for treating aluminum substrate acid cleaning and alkaline cleaning waste liquid

A waste liquid treatment and substrate acid technology, which is applied in metallurgical wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of high treatment cost, high treatment cost and high investment, and achieve Significant social benefits, reduced processing costs, and scientific and reasonable process design

Inactive Publication Date: 2010-07-28
申明乐
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The main defect of above-mentioned treatment method (1) is: the treatment cost is high, and produces a large amount of new sludge garbage
[0006] The above two treatment methods

Method used

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  • Process for treating aluminum substrate acid cleaning and alkaline cleaning waste liquid
  • Process for treating aluminum substrate acid cleaning and alkaline cleaning waste liquid

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Embodiment Construction

[0013] In conjunction with the accompanying drawings and embodiments, the specific process steps of the process of the present invention are further described.

[0014] The embodiment of the process for the treatment of aluminum substrate pickling and alkaline cleaning waste liquid in the present invention, see figure 1 , the following process steps are adopted: first add an appropriate amount of carbonate ore powder to the entire amount of aluminum-containing pickling waste, mix for metathesis reaction, and continuously stir throughout the whole process to fully discharge CO 2 , so that the pH reaches 3-5; then add the entire amount of aluminum-containing alkali washing waste liquid, mix and carry out neutralization reaction, so that the pH reaches 6-9, and separate the formed suspension to separate the waste water and aluminum hydroxide filter cake.

[0015] In the above steps, the amount of carbonate ore powder added has been calculated in advance, or adjusted according to...

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Abstract

The invention relates to a treatment method of industrial waste liquid and discloses a process for treating aluminum substrate acid cleaning and alkaline cleaning waste liquid. The process is mainly characterized by comprising the following steps of: firstly, adding a proper amount of carbonate mineral powder into aluminum-containing acid cleaning waste liquid to perform a replacement reaction, secondly, adding aluminum-containing alkaline cleaning waste liquid into the mixture for neutralization, and finally, separating the mixture to ensure that the waste liquid is discharged after reaching standards, wherein the waste residues are discharged as environment-friendly inorganic insoluble matters or serve as raw materials for producing aluminum. Therefore, the method has the characteristics of using cheap and easily-obtained carbonate ores and all the processed alkaline cleaning waste liquid, normally treating and separating the formed matters, greatly reducing treating cost and solving the technical problem of treating the aluminum-containing acid cleaning and alkaline cleaning waste liquid of small enterprises in the field, and has the advantages of scientific and rational process design, advancement and practicality, economy, obvious social effect and the like.

Description

technical field [0001] The invention belongs to a method for treating industrial waste liquid, and relates to a process for treating aluminum substrate pickling and alkali cleaning waste liquid. Background technique [0002] When the surface treatment of aluminum substrates is carried out, processes such as alkaline cleaning, degreasing, electrolytic roughening, and anodic oxidation are required, resulting in a large amount of aluminum-containing alkaline cleaning waste liquid with a pH of 12.5-13.0 and several times the volume of pH 1.0 -1.6 Aluminium-containing pickling waste liquid must be treated according to environmental protection laws. [0003] The current treatment methods mainly include: (1) mix the aluminum-containing pickling and alkali washing waste liquid, then add liquid caustic soda or other alkaline substances, and add quicklime etc. as filter aids if necessary, adjust to pH 6-9, Separation, waste water discharge, and the resulting filter cake is treated as...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F103/16
Inventor 申明乐张群安姬鄂豫陈海玲黄雪征
Owner 申明乐
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