Application of acid cold tandem rolling technology in metallurgical processing!

The domestic cold-rolled strip production output of more than 1 million tons / year, should be used with large and modern cold rolling mill continuous, automatic and high-speed characteristics, try to avoid using reversible rolling multiple single frame or double frame, in order to improve the production efficiency. Multi stand continuous rolling and divided into conventional single volume, continuous rolling head way rolling, pickling cold rolling and pickling cold rolling and continuous annealing combined four, following on from the small I to give you something to explain simple!

The conventional single roll rolling is a rolling form of the earlier periods, because each coil must be wearing, acceleration and flick a deceleration control accuracy of strip thickness and flatness is limited, there is easy to damage the surface of the roller strip tail and the slow pace of production can lead to production limited.

Full continuous rolling is in front of the welder and increase mill looper in steel coil rolled steel welded into the mill before the buffer function of looper makes Everfount into strip continuous rolling mill, Shaanxi furnace generally adopts continuous headless rolling mode, a wear can be continuous rolled down, rolling mill need only in the deceleration strip over the weld and the volume when. Obviously, the length of the lead and the tail thickness is shorter than that of the conventional continuous rolling mill, and generally less than 20m. The conventional single roll continuous rolling method can also be used for a few thicker strip and hard material strip.

The cold rolling tandem rolling method developed in the early 1980s showed the advantages of high continuity, automation and high speed. The pickling cold rolling joint saves intermediate base between pickling and rolling mill, but also saves between two processes such as welding, coiling and uncoiling, oil and other equipment, less land occupation, saving investment, high metal yield, so it is more and more widely used.

The pickling cold rolling _ continuous annealing production is a highly combined mode of production, the coordination between the unit and the unit is very important, before and after the reliability and the process of running speed of each process matching, automatic control level is higher, especially the continuous cold rolling and continuous annealing production combined with the difficulty. If one of the links fails, the entire line will be shut down. Therefore, the new cold rolling production line which is newly built and modified mostly adopts the pickling cold tandem rolling production line.