China Nonferrous Metallurgy

The isothermal pyrolysis test of waste PCB was carried out by using a self-designed tubular pyrolysis furnace. High-precision electric meter and a special time statistical method were used to improve measurement accuracy and accurately obtain the pyrolysis energy consumption of waste PCB. The test results showed that the measurement accuracy can be further improved by using stopwatch to record the time required for high-precision ammeter to beat 0.01kW·h in pyrolysis process, and make it in the same order of magnitude as the pyrolysis energy consumption of waste PCB so that the error can be reduced to within 3%. The unit pyrolysis heat of waste PCB increased as temperature rose. The unit pyrolysis reaction heat under the optimum pyrolysis temperature of 700℃ was 854.34kJ/kg. And the pyrolysis time gradually decreased with the increase of temperature. The heat value of pyrolysis gas from pyrolysis can fully meet the heat required by PCB pyrolysis reaction. If the capacity of pyrolysis hearth is increased, the waste PCB can be completely self-heated by pyrolysis.