Three Conditions Considered in Hot Rolling Mill Pass Design

The rolling pass desisgn when hot rolling is an important part to think about. Usually, there are 3 conditions should be considered.

Whether the rolling pass design is appropriate has a decisive influence on the productivity and output of the mill, product quality, energy consumption, and the difficulty of operation. So rolling pass design must be carried out strictly in accordance with the specific situation.

The specific conditions of hot rolling mill pass design are as follows:

Billet conditions should be considered: continuous casting billet or rolled billet, cross-section geometry, size and fluctuation range, billet surface quality, steel type, etc.

Equipment conditions should be considered: rolling mill layout, frame structure, unit composition, quantity and parameters, transmission mode, motor capacity and speed range, auxiliary equipment configuration and capacity.

Product conditions should be considered: product variety, specification range, dimensional accuracy, metal performance requirements.

When designing the rolling pass, we should pay more attention to the above 3 conditions. And below, we will talk about some advantages of the continuous casting machine applied in the hot rolling production line.

About the continuous casting process which is now the most commonly used in steel rolling production, we can understand these.

Continuous casting simplifies the production process, eliminating the demold casting process, the whole mold, steel ingot heating and billet opening process, capital construction investment can be saved by 40%, the floor area can be reduced by 30%, the operation cost can be saved by 40%, and the consumption of refractory materials can be reduced by 15%.

Using continuous casting process, the metal yield can be increased, and the loss of cutting head and tail of billet can be greatly reduced, and the metal yield can be increased by about 9%.

In this way, the mechanization and automation level of the production process are improved, and the energy consumption of the production process is reduced. The burning power consumption of the ingot billet heating furnace can be saved, and the energy consumption can be reduced by 25% ~ 30%.

On the basis of eliminating the initial mill in the conventional slab continuous casting and rolling, the "roughing mill" on the rolling line is also omitted. Therefore, the gap between the thickness of slab and the final rolled material is further narrowed, the production process is more compact, and the production cycle from liquid steel to finished material is greatly shortened. Compared with the traditional slab continuous casting machine and hot slab continuous casting and rolling mill, thin slab continuous casting and rolling has more outstanding advantages.

For more information about the hot rolling mill pass design, you can pay attention to Luoyang Judian. We're looking forward to hearing from you.