History and current status of industrial furnaces

[xiaohei]

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.[link text]( link url)https://www.vacfurnace.com/technology-frontiers/influence-of-vacuum-carburizing-and-quenching-on-new-gears/
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.[link text]( link url)https://www.vacfurnace.com/technology-frontiers/vacuum-heat-treatment-of-vacuum-carburized-alloy-steel-gear/