Aluminum profile processing wastewater treatment process

A technology for aluminum profile processing and wastewater treatment, applied in metallurgical wastewater treatment, neutralized water/sewage treatment, water/sewage multi-stage treatment, etc. Low problems, to achieve the effect of improving the reuse rate, protecting the environment, and reducing the burden
CN112897741APending Publication Date: 2021-06-04浙江乔老爷铝业有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
浙江乔老爷铝业有限公司
Publication Date
2021-06-04

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Abstract

The invention discloses an aluminum profile processing wastewater treatment process in the technical field of aluminum profile processing wastewater treatment, which comprises the following steps: mixing cleaning wastewater of deoiling, alkali washing and acid washing, and carrying out self-neutralization to obtain neutralized wastewater; adding a regulator into the neutralized wastewater to regulate the pH value of the mixed wastewater, and generating a precipitate at the same time; recycling upper-layer clear water in the step S1 and continuously taking as cleaning water, and filtering precipitates to serve as slag A; mixing cleaning wastewater of coloring, anodic oxidation and hole sealing, precipitating and removing slag to obtain upper-layer wastewater; adding quick lime, FeSO4 and NAOH into the upper-layer wastewater, adjusting the pH value, and carrying out a reaction to generate an aluminide; adding a flocculating agent to generate a precipitate, and filtering the precipitate as a slag B; mixing and drying the slag A and the slag B, carrying out water washing, adding a binding acid and calcining, so that activated aluminum oxide is obtained. The method has the advantages that water resources are saved, the reutilization rate is increased, Ni < + 2 > and Cr < + 3 > in water are removed, pollution is reduced, the waste slag can be recycled, and the environment is protected.
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Description

technical field

[0001] The invention relates to the technical field of aluminum profile processing wastewater treatment, in particular to a treatment process for aluminum profile processing wastewater. Background technique

[0002] Aluminum alloy profiles for construction require high comprehensive performance such as corrosion resistance, weather resistance, wear resistance, good appearance decoration and long service life. Therefore, aluminum profiles are protected by electrostatic powder spraying and fluorocarbon resin paint coating. Before decoration, surface chemical conversion treatment must be carried out to improve the bonding force between the coating and the substrate and meet the high corrosion resistance requirements. During the treatment process, waste water containing high content of nickel and chromium will be generated, and the production is not environmentally friendly.

[0003] The production process of aluminum profiles mainly includes degreasing, alkali e...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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