Converting electrical energy into thermal energy to heat an object. It is a form of electrical energy utilization. Compared with general fuel heating, electric heating can obtain higher temperature (such as arc heating, temperature up to 3000 °C), easy to achieve automatic temperature control and remote control, car electric heating cup
The object to be heated can be maintained at a certain temperature distribution as needed. The electric heating can directly generate heat inside the object to be heated, so the heat efficiency is high, the heating rate is fast, and the overall uniform heating or local heating (including surface heating) can be realized according to the heating process requirement, and vacuum heating and controlled atmosphere heating are easily realized. In the process of electric heating, less exhaust gas, residue and smoke are generated, which can keep the object to be heated clean and not pollute the environment. Therefore, electric heating is widely used in production, research and testing. In particular, electric heating is used in the manufacture of single crystals and transistors, mechanical parts and surface quenching, melting of ferroalloys, and manufacture of artificial graphite.