The characteristics of electric kilns are uniform furnace temperature, easy to achieve automatic control, and good heating quality. According to the energy conversion method, electric kilns can also be divided into resistance kilns, induction kilns, and electric arc kilns. The heating capacity of the kiln calculated in units of time and bottom area of the kiln is called the productivity of the kiln. Applications in other industries, such as metal smelting furnaces, ore sintering furnaces, and coking furnaces in the metallurgical industry; Distillation and cracking kilns in the petroleum industry; Generation kilns in the gas industry; Cement kilns and glass melting and annealing kilns in the silicate industry; Baking kilns in the food industry.

Kilns are equipment built with refractory materials to calcine materials or products. A kiln is defined as a device that enables a product to complete a certain temperature curve, atmosphere curve, and pressure curve coupled processing. The kilns we are discussing are limited to electrically heated kilns, mainly resistance heated kilns.