A configuration and method for recovering oxidation liquid in a transformed oxidation line and protecting a single-nickel-salt coloring tank

Abstract

A configuration for recovering oxidation liquid in a transformed oxidation line and protecting a single-nickel-salt coloring tank is disclosed. The configuration includes an oxidation liquid collection system, an oxidation liquid circulating and cooling system, an oxidation liquid treatment system, an oxidation liquid separation system, an oxidation liquid recovery and recrystallization system anda single-nickel-salt coloring tank protecting system. The invention further discloses a method adopting the configuration to recover the oxidation liquid and protect the single-nickel-salt coloring tank. The method includes oxidation liquid collecting, oxidation liquid circulating and cooling, oxidation liquid treatment and separation, oxidation liquid recovery and recrystallization, and single-nickel-salt coloring tank protection steps. The configuration and method achieve on-line crystallization and separation of aluminum ions and cyclic use of the oxidation liquid, can effectively reduce resistance of the oxidation liquid, greatly reduce the risk that the single-nickel-salt coloring tank is polluted, save water and achieve low-cost high-quality production.

Description

technical field [0001] The invention relates to a configuration and a method for recovering oxidizing liquid by reforming an oxidation line and protecting a single nickel salt coloring tank, and belongs to the field of aluminum processing. Background technique [0002] In the anodic oxidation solution of the oxidation tank, the aluminum alloy with a conductive surface is placed on the anode. Under the action of an external electric field, the process of forming an oxide film on the surface is called anodic oxidation, and the film produced is an anodic oxidation film or an electrochemical conversion film. [0003] Aluminum anodizing solution refers to the bath solution used for anodizing aluminum alloy. When slotting, the concentration of sulfuric acid in the anodic oxidation solution is between 160-200g / L, and there is no aluminum ion in the bath solution, which has a strong ability to dissolve the oxide film. Usually, the anodizing time is 40-60 minutes, the temperature is...

AI Technical Summary

Problems solved by technology

[0023] After recovering the crystallization and regenerating the curing solution in the oxidation tank, more than 120g / L of aluminum ammonium sulfate is still dissolved in the regenerated oxidizing solution, containing more than 4g / L of ammonium ions; although it has been cleaned by two flowing water washing tanks and a set of flowing pure water tank, There will still be some ammonium ions entering the single nickel salt coloring tank, which will affect the coloring

Images