Energy-Saving Steel Billet Induction Preheating Machine

Against the backdrop of global steel manufacturing’s low-carbon transformation and energy consumption dual-control policies, energy-saving renovation of traditional thermal processing equipment has become a key breakthrough for steel enterprises to reduce costs and upgrade. As essential pre-processing equipment for steel rolling and forging production lines, steel billet induction preheating machines are widely used for uniform preheating of carbon steel, alloy steel and stainless steel billets. Traditional old-fashioned equipment suffers from low thermal efficiency, serious heat loss and severe billet oxidation, resulting in high energy consumption and low production benefits. Recently, targeted technical renovation for induction preheating equipment has achieved remarkable energy-saving and efficiency-improving results, leading the green upgrading of billet heating processes.

For a long time, most steel mills rely on conventional resistance heating and early induction preheating equipment. Such devices have outdated power control systems and unreasonable coil structural design, leading to low electromagnetic conversion efficiency. A large amount of electric energy is lost in the form of heat radiation and current fluctuation. Meanwhile, slow heating speed and uneven internal and external temperature of steel billets not only increase unit power consumption, but also cause excessive surface oxidation, with the oxidation loss rate reaching up to 1.5%. These problems have long restricted the energy-saving and high-efficiency operation of continuous casting and rolling production lines.

steel sheet induction heat treatment machine

In terms of intelligent control, the renovated preheating machine is equipped with a full-digital automatic frequency tracking and power adjustment system. It matches power output in real time according to billet specifications, heating temperature and production speed, avoiding idle power consumption and overheating loss. The supporting infrared temperature closed-loop control system ensures precise and uniform heating, reducing the steel billet oxidation rate to 0.5%–1%. This not only cuts energy consumption by 25%–30% per ton of steel, but also significantly improves finished product yield.