Recycling technology for sludge in aluminum profile processing

Abstract

The invention provides a recycling technology for sludge in aluminum profile processing. The recycling technology comprises the steps of slurry mixing, wherein the sludge generated in aluminum profileprocessing is subjected to acid leaching and filter pressing to obtain a filtrate and filter residues; extraction, wherein the filtrate is extracted, extraction can be divided into one-stage extraction and cascade-stage extraction, and after extraction, a loaded organic phase and a final raffinate are obtained; reverse extraction, wherein the loaded organic phase is subjected to reverse extraction, and an aluminum chloride solution, a nickel chloride solution and a chromium chloride solution are guided out at different positions of a reverse extraction system. By means of the recycling technology for the sludge in aluminum profile processing, the sludge is recycled into a chemical product, metallic aluminum in the sludge is converted into the aluminum chloride solution, metallic nickel isconverted into the nickel chloride solution, metallic chromium is converted into the chromium chloride solution, and after cascade-stage extraction and reverse extraction, the recycling rate of aluminum-nickel-chromium ions in the sludge 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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