Iron and steel casting graphite molds are mainly based on the good performance of graphite. Generally speaking, graphite's high temperature resistance, corrosion resistance, chemical stability, thermal shock resistance and other functions are the prerequisites for graphite to enter the mold industry. At the same time, graphite is also used in graphite molds for continuous casting and semi-continuous casting of non-ferrous metals.

The electronic sintered graphite mold requires high purity, the content of fixed carbon is more than 85%, and the content of harmful impurities is less than 1%.

Electric spark is a kind of self-excitation discharge. Its characteristics are as follows: There is a high voltage between the two electrodes of the spark discharge before the discharge.