We've talked a little bit about the continuous caster on the steel rolling line. Today I'd like to talk to you about why continuous casting is so popular.
The continuous casting process eliminates the demold, the whole die, the ingot heating, the initial rolling and so on. This will save 40% in infrastructure investment, 30% in floor space and about 70% in Labour. The appearance of thin slab caster further simplified the working procedure. Compared with the traditional slab continuous casting (thickness of 150 ~ 300mm), the thin slab continuous casting (thickness of 40 ~ 80mm) eliminates the roughing mill, thus reducing the plant area by about 48% and the weight of the caster equipment by about 50%. The weight of hot rolling equipment is reduced by 30%. The production cycle from molten steel to thin plate is greatly shortened. The traditional slab continuous casting takes about 40h, while the thin slab continuous casting only takes 1 ~ 2h.
Increase the metal yield
With DIE casting, THE LOSS OF cutting HEAD AND tail from molten steel to billet is 10% ~ 20%, while THAT of continuous casting is 1% ~ 2%, SO THE metal yield can be increased by 10% ~ 14% (SLAB 10.5%, square billet 13%, billet 14%). If a steel mill with an annual output of 1 million tons of steel is calculated as a 10% increase, the continuous casting process can increase the production of 100 thousand tons of steel. For the process from molten steel to sheet metal, the yield of conventional continuous casting metal is 93.6%, while that of thin slab continuous casting is 96%. A steel mill with an annual output of 800 000 t of steel can produce about 24 000 t more hot rolled coil if the thin slab continuous casting process is adopted. The economic benefits are considerable.
Reduced energy consumption
The energy consumption can be REDUCED BY 1/2 ~ 1/4 BECAUSE THE reheating PROCESS of heating FURNACE is ELIMINATED by continuous casting. According to relevant information, the production of lt billet, continuous casting than die casting can generally save 400 ~ 1200MJ energy, equivalent to saving 10 ~ 30kg of heavy oil fuel. If the continuous casting billet adopts hot feeding and direct rolling process, the energy consumption can be further reduced, and the processing cycle can be shortened (the time from molten steel to rolled product along the process is: cold charging 30h, hot charging l0h, direct rolling 2h).
Production process mechanization, high degree of automation
In the process of steelmaking, die casting is a working procedure with great labor intensity and bad working environment. Especially for the development of oxygen converter steelmaking, die casting has become the limiting link to increase productivity. After adopting continuous casting, the working environment has been fundamentally improved because of the improvement of equipment and operation level and the use of whole-process computer control and management. Continuous casting operation automation and intelligence has become a reality.
The continuous casting steel is expanded and the product quality is improved day by day
At present almost all kinds of steel can be produced by continuous casting. The steel types of continuous casting have been expanded to include more than 500 ultra-purity steel (IF steel), high-grade silicon steel, stainless steel, Z-direction steel, pipeline steel, heavy rail, hard wire, tool steel and alloy steel. And the quality of continuous casting billet is better than that of die-cast ingot rolled products.
This is our share of continuous casting machine technology for steel rolling production today. I hope it can be helpful to you. Welcome to pay attention to Luoyang Judian for more knowledge about steel rolling production.
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