Disposal of Hazardous Plating Waste

For the electroplating sludge, rich in heavy metals, a multi-level circulation hydrometallurgical extraction process is applied to reclaim heavy metals like copper, nickel, chromium and zinc. For those with low levels of heavy metals and acid washing sludge, pyrometallurgy enrichment processes will be used to process at high temperatures without causing more pollution before they can be utilized as building materials. The industrial products include electrowinning copper, electrowinning nickel, copper sulfate, nickel sulfate, chromium sulfate, zinc sulfate and other high added-value products.