Study on Thermogravimetric Analysis of Waste Computer Mainboard

Chemical components and phase analysis experiment of waste computer mainboard was carried out with XRF and XRD. It shows that waste computer mainboard contains 20 kinds of metal and nonmetal elements, the content of copper is respectively 24.05% in the form of simple substance mostly; thermogravimetric analysis was carried out at a heating rate of 20 °C/min in nitrogen atmosphere, The result shows that the weight loses change in three steps: the weight lose occurred mainly between 320.73 °C to 550 °C, which possess about 30 percent of the total weight, The mass was basically not changed below 320.73 °C and approximately accounted for about 3 percent of when the temperature was between 550 °C and 1300 °C. At the same time the pyrolysis process make the surface morphology and elevation morphology change. The experimental study provided valuable basis for the industrial recovery of waste computer mainboard.