In the production of billet fast rolling mills, continuous casting billets are used. During continuous casting and rolling, because the temperature of the continuous casting slab is very high, it is not recommended to use the traditional heating process. Otherwise, it will not achieve the purpose of energy-saving, increasing production and reducing consumption, but also increase oxidative burning loss and increase the scale, which will make the grains be coarse and even overheated. Since the temperature of the continuous casting slab is relatively high, the limitation of the heating rate can be ignored regardless of the thermal stress, and the rapid heating technique can be used for continuous casting and rolling.

The high-temperature rapid rolling technology means that the steel billet is heated at a high temperature as soon as it enters the heating furnace, and the cold drawing machine sets the furnace temperature in the heating section of the heating furnace at 1050 to 1150℃, and the furnace temperature in the soaking section is set at 1100-1200℃. This allows rapid heating of the heated billet at the maximum possible radiant temperature, further shortening the billet heating time and the length of the furnace, while further improving the heating quality and reducing the oxidative burn rate, and then performing billet rolling.

Generally, when the regenerative heating furnace is heated, the heating furnace does not have the preheating section, and the inverted casting wire drawing slab enters the heating furnace and directly performs high-temperature heating, generally above 700℃, and the furnace temperature in the high-temperature zone of the heating furnace can be above 1200℃, the heating speed can be greatly accelerated, and the output per hour is greatly improved. When the output is increased, the heating capacity is no longer a weak part, because the rolling mill can achieve high-temperature rapid rolling, increase productivity, and the heating quality is greatly improved. The oxidation loss is greatly reduced, and the energy-saving effect is obvious.

The new high-temperature rapid rolling technology of regenerative heating furnace + hot-feeding hot charging is the best partner for the production of continuous casting billet. The profiled straightening machine is compared with the non-regenerative heating furnace for cold or hot charging, when the heating furnace is fully hot, it can reduce 25~30%, and 60% can save 15% energy when it is hot. Therefore, fast-rolling technology can improve heating quality, reduce energy consumption, and improve productivity. At the same time, for the high alloy rolling, the crack defects caused by the thermal stress can be effectively suppressed.