Abstract:The main physical and chemical characteristics of waste printed circuit boards were analyzed. Combined with the advantages of top blow bath smelting technology, when the calorific value of the charge is controlled to be 8.5-9.5 MJ/kg, the organic matter in the charge can be fully burned by adding oxygen-rich air, and basically self-heating smelting can be realized. After calculation, the energy consumption of producing 1 ton of crude copper is 220 kgce/t, which can save 2 520 kgce/t and reduce CO2 emission by 6.60 t/t compared with ore copper, and save 170 kgce/t and reduce CO2 emission by 459 kg/t compared with recycled copper. In the actual production process of the demonstration project of waste printed circuit board melting technology, when the feed time is maintained at 2.5-3.0 h, the self-heating smelting can be realized over 80% of the production time in normal production, except for discharging slag and refueling during shutdown.