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人们对电热的利用已有二百多年的历史。时至今日,电炉的应用几乎遍及国民经济的各个领域。如制取各种材料、改变材料的形状和改善其性能以及烧结、干燥等各种加热。相应地产生了各种熔炼炉、加热炉和热处理装置以及为完成其他工艺要求的不同加热设备。近年来,从节约能源、防止公害和提高产品质量等方面出发,对电炉提出了许多新的要求,电炉技术不断发展和完善,新设备不断涌现。归纳起来,
People have more than 200 years of use of electric heat. Today, the application of electric furnace covers almost all areas of the national economy. Such as making a variety of materials, changing the shape of the material and improve its performance and sintering, drying and other heating. Correspondingly, various smelting furnaces, furnaces and heat treatment plants as well as different heating equipment to fulfill other process requirements are produced. In recent years, from the aspects of energy conservation, pollution prevention and product quality improvement, many new requirements have been put forward on the electric furnace. The electric furnace technology has been continuously developed and improved, and new equipment is constantly emerging. To sum up,