Method for precipitating industrial-raw-material-level basic copper carbonate from PCB wastewater by adopting wet-process fluidization

The invention provides a method for precipitating industrial-raw-material-level basic copper carbonate from PCB wastewater by adopting wet-process fluidization. Copper-containing waste liquor with copper concentration lower than or equal to 1% and copper-containing wastewater are mixed, the mixture enters a mixed storage tank, is uniformly mixed and flows into a fluidized bed, sodium hydroxide is added to regulate pH to 9 plus/minus 0.5, purity of produced basic copper carbonate crystals is 95%-98%, the moisture content is lower than or equal to 10%, surface purity of valuable element crystals of basic copper carbonate is quite high, and the crystals can be recycled to meet market demands. By means of treatment of the copper-containing PCB wastewater, treatment of cleaner production wastewater can meet the standard, secondary pollution is avoided, and chemical dosage and cost are reduced on the premise that copper ions of effluent meet the standard and sludge discharge is reduced; for the basic copper carbona