Brief introduction of hot tandem mill.

Hot continuous rolling production process: after the billet is heated and discharged from the furnace, the scale is removed by high-pressure water descaling, and the billet enters a four-high reversible roughing mill to be cogged and rolled into an intermediate billet suitable for continuous rolling. When cogging, the neutral roller ensures the accurate width of the steel plate, and the intermediate billet enters the continuous rolling mill after flying shear. Once rolled into the required specifications, and finally coiled by the coiler. In the rolling process, both roughing mill and finishing mill have high-pressure water to descale the steel plate for the second time.

Hot tandem mills usually adopt full-line automatic control, hydraulic AGC automatic thickness control, strong roll bending system, rapid roll change and other new technologies. In 1980s, thin slab continuous casting and rolling technology was widely used in hot continuous rolling production, and the billet directly entered the rolling line after soaking in steelmaking and continuous casting. The process characteristics of short process, low energy consumption and high production efficiency make hot rolled strip enter a new period.

With the development of hot-rolled composite plate technology, stainless steel composite coil plate has been successfully produced on hot continuous rolling mill, which meets the market demand for stainless steel composite coil plate and becomes a new variety of hot continuous rolling production.