Emulation Of Dynamic Secondary Cooling And Soft Reduction In Continuous Slab Casting

Continuous casting is the important link in steel-rolling. How to reduce the production cycle and to improve product quality as well as the manufacturing process are the major problems to the iron and steel enterprises. As there is an obviously unsteady state in the casting process, the casting speed, the casting temperature, the environment temperature, the temperature of the cooling water, the quantity of the second cooling water and the raw materials component will affect the quality of products.Research and improvement to the production process technique of continuous casting is of great significance to the steel technology. Currently the foreign continuous casting production of automation has been highly developed. In order to learn advanced technology and experience, some domestic steel companies have introduced the Siemag or VAI secondary control system. However, production practice shows that the second dynamic process of secondary cooling water control is a lag and complex system. It often delays the dynamic secondary cooling water ratio. Before calculating the quantity of the two cooling water under in the current loop, the slab has been moved to the next area, affecting the results. If the result is not precise enough, it will directly affect the depressed position identified and reduce product quality.Different from the previous general casting simulation software, the system modeling and simulation analysis based on the continuous casting metallurgy standards are used to predict the continuous casting production. And the finite difference method is used to establish a slab solidification heat transfer model of two-dimensional non-steady state. This method can compare the target temperature curve with the actual temperature. Experiments and simulations are carried out, and the results show the proposed method is applicable.