Sustainable Mining and Metallurgy

Isothermal pyrolysis of waste PCB (printed circuit board) was studied by using tubular pyrolysis furnace under nitrogen protective atmosphere to explore the law of effect of pyrolysis temperature and holding time on pyrolysis rate and pyrolysis products of waste PCB, and analysis was made for the pattern of distribution of bromine in pyrolysis products. The results of the experiment show that the waste PCB can be fully pyrolyzed at the temperature of 700℃ with a pyrolysis time of 40min. The waste PCB can be fully pyrolyzed with a pyrolysis rate of 97.74%, and the solid, liquid and gas product yields are 72.67%, 15.51% and 11.82% respectively, and the distribution proportion of bromine in the solid, liquid and gas products are 15.02%, 5.72% and 79.26%, respectively.