Method for recycling copper from electroplating sludge and electroplating wastewater

Abstract

The invention relates to a method for recycling copper from electroplating sludge and electroplating wastewater, and relates to the technical field of chemical engineering and metallurgy. The method adopts process technologies such as leaching, homogenization, tubular electrolysis and fluidized electrodeposition to obtain a high-value electrolytic copper plate and electrodeposited copper powder respectively; the comprehensive recovery rate of copper is more than 98% which is obviously superior to that of traditional recovery methods such as displacement method and chemical precipitation method, and coupon electrodeposition method; and the method is widely suitable for different kinds of copper-containing electroplating sludge and copper-containing electroplating wastewater. The obtained electrolytic copper plate meets the demands of GB / T467-1997 on the standard cathode copper with a brand of Cu-CATH-2 and the copper content of the obtained electrodeposited copper powder is more than 80%.

Description

technical field

[0001] The invention relates to the technical field of metallurgy and chemical industry, in particular to the technical field of electrochemical recovery of copper. Background technique

[0002] The electroplating sludge and electroplating waste liquid described in the present invention refer to a kind of hazardous waste produced in the electroplating industrial production, the former refers to the copper-containing wet sludge produced by the neutralization and treatment of electroplating wastewater, and the latter refers to the Liquid waste such as bath change solution, deplating solution, cleaning solution, etc. Due to the different types of plating, the electroplating sludge and electroplating waste liquid produced are of various types, complex components, and different levels of copper. Copper-containing sludge often contains impurity metals such as iron, nickel, chromium, zinc, etc., and the copper content ranges from 1% to 10%, and some are even lower ...