Thermodynamic Analysis and Experimental Study on Carbothermal Reduction of Zinc Dusts at Vacuum Condition

摘要

The comprehensive recovery of zinc and lead by carbothermal reduction of zinc dusts in vacuum was investigated by XRD. SEM and DTA-TG. Thermodynamics analysis indicates that it can reduce the critical carbothermal reduction temperature of zinc oxides and lead oxides to zinc and lead in vacuum condition. Experimental results demonstrate that pure zinc and lead are obtained with molar ratio of (PbO + ZnO) to C ranging from 1:1 to 1:3 at 850-1000 °C distillation reduction for 40-100 min when the system pressure is 20 Pa.