Shougang Slab Continuous Casting Cold Water On The Dynamic Control Of The Establishment And Implantation Of Model

The control of secondary cooling holds very important status during continuous casting. When other technical condition remain unchanged, the intensity of cold and increase the speed of casting are all can improve the productivity of casting machine. However, at the same time the cold parameters are not improper is one of the main reason of various defects. Secondary cooling control includes steady cooling control and dynamic cooling control, dynamic cooling control can adaptive the change of the situation very well. the slab temperature control within reasonable limits. With the increasing of computer performance, and automation level, dynamic secondary cooling water distribution has been widely used in continuous casting production lines, It plays a tremendous role in raising the slab quality.This subject take the Shougang steel slab continuous casting machine as research and development base, through studying the theory of the slab continuous casting and solidification heat transfer mathematical model, the analysis of its static allocation of water is done firstly. The two cold-water table and the dynamic cold water distribution software, which can optimize the process parameters, is designed based on this.In the heat transfer model, numerical methods is used to solve the equation. According to the database model stored in steel thermal physical parameters, casting speed, cooling water, tundish temperature and the temperature calculated solidification state.The dynamic cooling system is based on the residence time method in which the slab is divided into many slices which are tracked. The water flow rate is determined mainly by the residence time of the slices. The residence time method can soundly control the fluctuation of slab surface temperature, which is verified by both simulation and plant trial. In addition, the method of aim temperature control is applied to reduce the fluctuation of slab surface temperature further.Water distribution software is developed based on the heat transfer model and the old model of billet. This software includes online and offline mode model, using a meter off-line mode design and produce for the scene. Dynamic online distribution model will be applied to production. The software not only provide a good user interface and ease of database management, but also save a detailed of the various parameters of the production process, this is conducive to the production of casting machine running for analyzing and process optimization.The results adapting that the water meter designed by the offline model can meet the slab quality requirements. The hydro-dynamic can better adapt the variable speed,it also make the temperature in a reasonable limits. This method has practical significance to improve quality and new steel slab of the water distribution design and evaluation.