Do you know the development history of the annealing furnace?

     The working space is a groove. The tank is full of coal. The air for incineration is supplied from the lower part of the storage tank, and the workpiece is buried in coal and heated. The furnace has low thermal efficiency, poor heating quality, and can only heat small workpieces. Later, this is a kind of indoor furnace, which is a semi-enclosed or fully enclosed furnace made of refractory bricks. It can be used as a fuel for coal, natural gas or oil. You can also use electricity as a heat source and heat the workpiece in the furnace

      The emergence and development of annealing furnace manufacturers play an important role in the progress of mankind. A relatively complete copper smelting furnace appeared in the Shang Dynasty. The furnace temperature reaches 1 200°C, and the furnace inner diameter reaches 0.8 meters. In the Spring and Autumn Period and Warring States Period, people further mastered the technology of raising furnace temperature on the basis of copper melting furnace, thus producing cast iron.

       Precautions before and after the use of the trolley annealing furnace for heat treatment equipment In 1794, the world introduced a straight cylindrical cupola with molten cast iron. Later, in 1864, Frenchman Martin used the principle of the regenerative furnace of Siemens in the United Kingdom to manufacture a steelmaking open hearth furnace heated with gaseous fuel. He used a heat accumulator to preheat air and gas at high temperatures to ensure that the steelmaking temperature was higher than 1600°C. Around 1900, the power supply gradually began to use various resistance furnaces, electric arc furnaces and core induction furnaces.

       Precautions before and after the use of annealing furnace? In the 1950s, coreless induction furnaces developed rapidly. Later, an electron beam furnace was used, which used an electron beam to impinge on the solid fuel, thereby enhancing the appearance of heating and melting high melting point materials.