| abstract |
The invention provides a method for the cooperative disposal of copper smelting hazardous waste and the comprehensive recovery of valuable metals, which comprises the following steps: carrying out normal pressure-pressurization two-stage countercurrent leaching on copper smelting smoke dust to obtain normal pressure leaching liquid and lead-silver-bismuth slag, and carrying out electrodeposition pre-copper removal on the normal pressure leaching liquid to obtain electro-copper and pre-copper removal liquid; then adding arsenic sulfide slag into the pre-decoppered solution for displacement copper precipitation to obtain copper sulfide concentrate and a copper precipitation solution; introducing SO into the copper precipitation solution 2 And (4) reducing the flue gas to precipitate arsenic to obtain arsenic trioxide and arsenic precipitation liquid. The present invention providesThe method for the cooperative treatment of the hazardous waste in copper smelting and the comprehensive recovery of valuable metals has the advantages of high recycling and harmless treatment degree of waste residues, good comprehensive recovery effect of the valuable metals, no generation of waste acid, waste water and dangerous solid waste in the whole process, provides a new path for the cooperative treatment of the hazardous waste in copper smelting, and has wide application prospect. |