A process for recycling sludge in aluminum profile processing

Abstract

The invention provides a process for recycling sludge in aluminum profile processing, which includes pulping, extraction and stripping, wherein pulping includes acid leaching and pressure filtration of sludge generated in aluminum profile processing to obtain filtrate and filter residue; Finally, the filtrate is extracted. The extraction can be divided into single-stage extraction and cascade extraction. After extraction, the loaded organic phase and the final raffinate are obtained; then the loaded organic phase is back-extracted, and the chlorinated Aluminum solution, nickel chloride solution, chromium chloride solution. Sludge is recycled into chemical products through the sludge recycling process in aluminum profile processing of the present invention, metal aluminum in the sludge is converted into aluminum chloride solution, metal nickel is converted into nickel chloride solution, and metal chromium is converted into chloride solution Chromium solution, the recovery rate of aluminum, nickel and chromium ions in the sludge after cascade extraction and stripping can reach 99%.

Description

technical field [0001] The invention relates to a sludge recovery and utilization process in the processing of aluminum profiles, and belongs to the technical field of sludge recycling process technology. Background technique [0002] In the production process of aluminum profiles, a large amount of colloidal waste liquid will be produced during the surface treatment of aluminum profiles. After precipitation treatment, it is commonly called sludge. Aluminum element, the treatment method of this kind of sludge is generally entrusted by the enterprise to a qualified unit for treatment - landfill or incineration, etc., and the external entrustment is not only costly, but also the amount of entrustment is limited. [0003] At present, the hazardous waste produced by most aluminum profile enterprises is piled up and awaiting treatment, which not only takes up a lot of land, but also wastes a lot of aluminum resources. Therefore, a process technology that can separate and recycle...

AI Technical Summary

Problems solved by technology

[0002] In the production process of aluminum profiles, a large amount of colloidal waste liquid will be produced during the surface treatment of aluminum profiles. After precipitation treatment, it is commonly called sludge. Aluminum element, the treatment method of this kind of sludge is generally entrusted by the enterprise to a qualified unit for treatment - landfill or incineration, etc., and the external entrustment is not only costly, but also the entrusted amount is limited

[0003] At present, the hazardous waste produced by most aluminum profile enterprises is piled up and awaiting treatment, which not only takes up a lot of land, but also wastes a lot of aluminum resources

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