The creation and development of industrial furnaces play a very important role in human progress. A relatively complete copper smelting kiln appeared in the Shang Dynasty in China. The temperature of the kiln reached 1200 ° C and the inner diameter of the kiln reached 0.8 meters. During the Spring and Autumn Period and the Warring States Period, people further mastered the technology of increasing the temperature of the kiln on the basis of copper melting furnaces, thereby producing cast iron. In 1794, a straight cupola furnace for smelting cast iron appeared in the world. Later in 1864, the Frenchman Martin used the British Siemens regenerative kiln principle to build the first steel-making open-hearth furnace heated with gaseous fuel. He uses a thermal storage chamber to preheat air and gas at high temperatures, thereby ensuring a temperature above 1600 ° C required for steelmaking. Around 1900, the power supply gradually became sufficient, and various resistance kilns, arc kilns, ...