Experimental Study on Heating Performance of Electric Heating Plate Prepared from Graphite Solid Waste

The continuous growth of graphite consumption in China has led to the continuous increase of the total amount of graphite solid waste, which will not only occupy space, but also cause damage to the environment. In order to help solve this problem, electric heating plates were prepared by using different forms and proportions of graphite solid waste, including mining waste rock and spherical graphite tailings, which provided a new idea for the selection of raw materials for electric heating plates. Through experiments, the variation law of heating performance of electric heating plates prepared by graphite solid waste with input voltage and graphite tailings content was preliminarily obtained, and the reliability of its long-term work was verified. The test results show that the heating performance of the electric heating plate is better when the input voltage is greater than 24 V. The higher the spherical graphite tailings are, the higher the output power of the electric heating plate is. After 270 cycles of heating, the volume resistivity of the heating plate still changed little, which shows that it can be used for a long time.