Development And Application Of All-purpose Computer Simulation Software Of Secondary Cooling In Slab Continuous Casting

lii continuous casting research it is an important method to establish the heat transfer mathematical model of slab continuous casting to simulate secondary cooling process by means of two-dimensional unsteady state heat transfer mathematical model. The previous solution to the secondary cooling heat transfer mathematical model is simplified too much, and the boundary condition is mostly derived flum empiiical formula. Simulation software lacks commonality and is convenient to be operated and widely applied.Based on the thorough research of slab caster, a more comprehensive heat transfer mathematical model of slab continuous casting is established in this paper. By means of object-oriented programming language Visual Basic 6.0, all-purpose computer simulation software of secondary cooling in slab continuous casting is developed. The mathematical model is more all-around and the calculation condition is approximate to production condition. The interfhce of the software is fliendly, the data input and modification are convenient and calculating time is shortBy means of the HTC-202 testing eqyipment of nozzle characteristic made in Chongqing university, the nozzle cooling state and hot state characteiistic is systematically tested for the 48 kinds of nozzle Cmlport and homemade nozzle) of 1930 caster in Bnosteel. 30 thousand data is obtained. Testing results are analyzed, then the boundary condition (the heat transfer coefficient of and the water density)for computer simulation is acquired.Through simulation in computer using the all-purpose computer simulation software secondary cooling in slab continuous casting and test results, the influence of the factor such as casting speed, casting temperature, shell thickness and secondary cooling system are analyzed. The secondary cooling system is evaluated, the reasons of crack are analyzed. And the solution scheme is obtained. Strand temperature is measured on site in Ba)steel. Measurement results compared with simulation result; wiuich means that the deviation is less than 3%. It showa that the simulation result and all-purpose computer simulation software of secondary cooling in slab continuous casting are reliable.