Abstract:Conventional pyrolysis of waste printed TV circuit boards was studied. Effect of nitrogen flow rate on yield and composition of pyrolysis products were explored, and pyrolysis products were analyzed and characterized by SEM, XRD, GC, GC/MS and other tests means. The results show that liquid yield decreases with increase of nitrogen flow rate and reaching the minimum value of 10.85% at 0.3 L/min; gas yield rises with increase of nitrogen flow rate and reaching the maximum value of 14.4% at 0.3 L/min. Metals such as Cu, Sn and Ag are enriched in solid product, which fluctuate with increase of nitrogen flow rate, and can be used as raw material for copper smelting. H2 is main component in gas product, and the maximum content is 68.21% when nitrogen flow rate is 0.3 L/min; the total content of H2, CO, CH4 is 80.12%—82.39%, which is a good hydrogen-rich gas. Main liquid products are phenol, 4-isopropylphenol, etc., which can be used as chemical raw materials. The gas, liquid and solid products obtained from pyrolysis of waste printed TV circuit boards can be comprehensively and efficiently utilized.