Cyclone treatment technique of nickel-containing electroplating wastewater

Abstract

The invention discloses a cyclone treatment technique of nickel-containing electroplating wastewater. By adopting a cyclone technique which is completely different from the traditional technique for electrodepositing nickel, the current efficiency can reach 90% above which is much higher than 75% in the traditional nickel electrodeposition. The current density is 600-800 A / m<2> which is more than twice higher than that of the traditional technique. Besides, the nickel product produced by the technique has the advantages of stable quality and low requirements for impurity content in the catholyte. The technique can decrease civil engineering investment, and has the advantages of low production cost, high degree of mechanization, low workshop labor requirement, low worker labor intensity and the like.

Description

technical field [0001] The invention relates to the technical field of electrolytic recovery, in particular to a swirl flow treatment process for nickel-containing electroplating wastewater. Background technique [0002] As a corrosion-resistant metal, nickel is widely used in the electroplating industry. However, if the electroplating nickel-containing wastewater produced in the electroplating process is discharged directly without treatment, it will cause serious environmental pollution. [0003] At present, the recycling and treatment technologies of nickel-containing electroplating wastewater include solvent extraction, chemical precipitation, ion exchange and adsorption. [0004] 1. Solvent extraction method [0005] Solvent extraction is a separation method that uses the difference in solubility of heavy metal ions in the organic phase and in water to concentrate heavy metals in the organic phase. The organic phase is also called extractant, and the common ones are ...

AI Technical Summary

Problems solved by technology

The most commonly used adsorbent is activated carbon, but it is expensive, has a short service life, requires regeneration, and is expensive to operate

In addition, the adsorption method has a wide range of applications in the treatment of heavy metal-containing wastewater and will not cause secondary pollution. However, the adsorption selectivity of the adsorbent for heavy metal ions is often not high, so it cannot be well promoted.

[0012] In summary, the existing technologies for treating nickel-ion-containing electroplating wastewater have disadvantages such as complex process, difficult control, secondary pollution, and low removal rate.