History and current status of industrial furnaces

As thermal equipment for smelting, roasting, sintering, melting, heating and other processes of materials or workpieces, relatively complete copper smelting furnaces have appeared in China as early as the Shang Dynasty in industrial furnaces, and the furnace temperature can reach 1200 °C. During the Spring and Autumn Period, with the development of technology to increase furnace temperature, cast iron appeared at that time.HORIZONTAL MITRE BAND SAW MACHINE BS-1018R In 1794, a straight cupola for melting cast iron appeared in the world. Then, in 1864, on the basis of Siemens (England) regenerative furnace principle, Martin (France) built the first steelmaking open hearth furnace heated by gas fuel. Through the high temperature preheating of air and gas in the regenerator, he made the furnace temperature reach the temperature above 1600 ℃ required for steelmaking.HORIZONTAL SCISSOR STRUCTURE MITER METAL BAND SAW MACHINE CS-280S By the 1920s, the supply of electric energy was gradually sufficient, and various resistance furnaces, electric arc furnaces and cored induction furnaces were used in industry to achieve a wide range of applications. At the same time, the emergence of mechanized and automated furnace types has increased furnace productivity and improved working conditions to a certain extent.Analysis of carbon content on the surface of carburized parts In the 1950s, coreless induction furnaces developed rapidly. Later, electron beam furnaces appeared, which use electron beams to impact solid fuels, which can enhance surface heating and melt materials with high melting points.Precision carburizing heat treatment of gears