The temperature in Tunsish of continuous casting fluctuation in the middle package of continuous casting is one of the key factors affecting the quality of continuous casting production, and the constant temperature control of casting process is the ultimate goal of continuous casting production.
Middle package induction heating device, through the electromagnetic induction method, in the middle package temperature compensation, can control the middle package of molten steel temperature fluctuation within 3℃, at the same time, the channel of molten steel induction current total "hoop or pinch " force can effectively remove the non-metallic inclusions in liquid steel, become an important means of high-end optimal special steel production.
Our company has exclusively cooperated with Japanese FUJI motor in the field of Tunsish induction heating, providing induction heating devices for various packages of Tunsishs, realizing constant temperature casting in the continuous casting process, and significantly improving the problem of fine inclusion.
Induction heating of Tunsish has become more and more important means of special steel production. Domestic Xingcheng Special Steel, Maanshan Steel and Baosteel are equipped with this device to achieve the production of high-end special steel.
At present, there are two kinds of heating in the tundish, one is plasma heating , another is induction heating heating and induction heating. The induction heating method is increasingly favored by high-end steel manufacturers for its advantages of high heating efficiency, stable temperature control, inclusion removal and less interference to peripheral equipment. The specific comparison is shown as follows:
| Compare the content | Plasma heating | Induction heating |
|---|---|---|
| Heating method | The plasma gun ionizes the inert gas, forming an ion torch for molten steel heating, but it is easy to local high temperature. | The induced current is generated in the steel water to heat up the molten steel water, so the heating temperature is more uniform. |
| Temperature control accuracy | Target temperature is ± 5℃ | Target temperature is ± 2 to 3℃ |
| efficiency of heating surface | ６０～７０％ | 90％Above |
| Remove impurities | no effect | Effectively remove |
| Secondary pollution of steel water | Due to ionization, nitrogen element is added to the molten steel | no |
| environment effects | Large noise and electromagnetic radiation | less |
| Operation maintenance | Complex, difficult to repair | Simple, easy to maintenance |
