The traditional fixed-rule cutting of continuous casting slab adopts straight line cutting, and the convex head and concave tail will appear after hot rolling. Because the irregular head and tail can only be treated as waste material, the yield of hot rolled plate is reduced.
We after field investigation, model calculation, experimental data acquisition, etc., developed a existing continuous casting slab head and tail shape optimization of cutting technology and equipment, namely in the size cutting, the existing slab rectangular shape to concave head convex tail shape ( both forming arc-shaped ), and then sent to the subsequent hot rolling process, after the rolling hot rolling head and tail is straight, reduce the proportion of scrap cut, improve the metal yield of hot rolled plate.
According to preliminary estimates, for the annual output of 10 million tons of steel mills, the use of arc-shaped optimization cutting can bring more than 20 million yuan of economic benefits.
In the increasingly fierce competition, fine management is becoming increasingly important, at present, the domestic steel giant Baosteel has fully used the slab head and tail to optimize the cutting.
| Content | Data | remark |
|---|---|---|
| Ordinary cut loss ratio | 0.5 % | |
| Optimize the cutting loss ratio | ≤ 0.4 % | = 0.5 % X（1-20 % ） |
| Annual production capacity (ten thousand tons) | 1000 | |
| Cut loss reduction (ton / year) | 10000 | =10000thousand tons（0.5 %-0.4 % ） |
| Bring benefits (ten thousand yuan / year) | 2000 | =10000 X 2000(Unit price of ordinary hot rolling-unit price of scrap steel) |
