Design of Dynamic Secondary Cooling Control System for Continuous Casting
At present,with the increasing thickness of continuous casting slabs and higher requirements for slab quality in subsequent production processes,the primary task for most steel works is increasing the output of the casting machine as well as ensuring the quali-ty of the slabs to meet the process requirements.The in-depth and detailed study of secondary cooling technology is more conducive to improving the quality of slabs and production efficiency of casting machines.Based on Siemens S7-1500 PLC,this paper completed a design of the secondary cooling system for continuous casting,and carried out commissioning and operation in Hunan Hualing Lianyuan Steel Co.,LTD.3# continuous casting.The system is composed of S7-1500 master controller,ET-200MP slave station 1,an ET-200MP slave station 2,ET-200MP slave station 3,and XC208 switch for the ring network.The S7-1500 controller analyzes and processes the signals collected from the three stations,and outputs the control signals.PROFINET is used to communicate between master station and slave station,and XC208 switches are used to form a ring network.The whole system can automatically adjust the water and air flow rates according to the casting speed,slab mode and temperature.This design uses TIA Portal software for hardware configuration and programming,and completes the screen monitoring in WINCC.
Siemens 1500PLCPneumatic control valveElectromagnetic flowmeterPressure gaugeWINCC
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