Secondary cooling is an important part of continuous casting billet production, which is closely related to the yield and quality of billet.

High-temperature slab production requires high draft temperature, and requires secondary cooling to adopt weak cooling. Common weak cooling methods include dry cooling, gas-water cooling and water spray and gas-water mixing and cooling. The secondary cooling for the production of high-temperature slabs should take into account the quality and yield of the slab in addition to the temperature of the slab. The secondary cooling adopts computer dynamic control to maximize the cooling efficiency and cooling uniformity of the secondary cooling water and ensure the quality of the slab.