The Algorithm On Secondary Cooling Dynamic Model Of Continuous Casting And The Software Development

The control of secondary cooling holds very important status during continuous casting. The control of secondary cooling water spraying not only relates to the product quality directly, but also affects caster machine output closely. Perfecting secondary cooling system through optimizing is more and more important, numerical analysis and technique of simulation by computer has provided the convenient engineering facility. Constructing heat transfer of mathematic model, determining accurate computation parameter and compiling computational procedure to analog simulate the cast process, rapidly, accurately discover rule and casting craft in the solidification process of continuous casting blank that can obtain better economy and social efficiency.NO.1 billet continuous caster in the first steelmaking plant of Jinan Iron and Steel Co. Ltd. was designed by DeMark and putted into production in 1989. Recently, because the year equipment inline is long and the continuous casting craft designed firstly can't satisfied the high efficient continuous casting that have high requirement on quality, production rate and casting speed.In 2005, modification works to No.1 continuous cater secondary cooling system was carried by the joint of Chongqing University and the Jinan iron and steel company. Heat transfer mathematic model of billet is built corresponding with casting machine structure of No.1 caster. Dynamic billet secondary cooling system is developed with weighted average velocity replacing actual speed to call secondary water cooling casting blank from static water list. Dynamic billet secondary cooling system can resolve excessively cooling intensity or deficiency in the secondary zone when the casting speed changes abruptly.Research on mechanical behavior and physical property of steel casting blank under high temperature in order to ameliorate continuous casting blank solidifying process and formulate reasonable secondary cooling systems is significant. Paper select steel Q345 AH36 casting in Liuzhou Iron and Steel Company to test part of high temperature property of steel casting blank. The test result provides basic data for determining surface temperature curve of slab cooling and other calculation parameter for developing slab dynamic model.In order to monitor and control secondary cooling in a good way under vary casting condition, calculate the amount of secondary cooling water in-line according to...