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Product Introduction

In the electronic manufacturing factory, the copper-containing wastewater have various characteristics owing to the purpose of manufacturing process, and it normally contained different type of organic substance or oxidizing agent. For instance, the super-roughening or brown oxide wastewater from PCB industry have very strong chelating agent, which cannot be recovered by direct electrowinning. In addition, during the electronic manufacturing process, cleaning process is very important. Therefore, water rinsing process always accompanied after etching process, and low Cu concentration wastewater will be produced. Owing to very large wastewater quantity and low Cu concentration, direct electrowinning is not applicable.

 

To treat various type of copper wastewater, Waste Recovery Technology develops the solvent extraction process. We utilize specific organic additive with strong chelating ability toward Cu ions, which can effectively separate the organic impurity in the wastewater, and transform the Cu ions inside the wastewater into pure sulfuric copper.

 

According to the demand of customer, Waste Recovery Technology can provide the solvent extraction plus Recocell electrowinning system. With appropriate process design, we can realize the possibility to recover all Cu ions inside the Cu wastewater into Cu metal, and completely give up the conventional precipitation treatment process, which saves the chemical addition cost and eliminates hazardous Cu sludge.

 

The solvent-extraction system provided by Waste Recovery Technology has following benefits:

 

  • Able to treat Cu wastewater with strong chelating agent.
  • Able to treat Cu wastewater with halogen group impurities such as chloride, fluoride or bromide.
  • Able to treat Cu wastewater lower than 1000 ppm Cu concentration.
  • Able to treat Cu wastewater with strong hydrogen peroxide or sodium persulfate oxidizing agent.
  • Able to realize continuous operation.
  • High automation electronic control system which can realize smooth integration into existing wastewater treatment module.