Research And Application Of Ultra-fast Cooling Automatic Control System For 2250mm Hot Rolling

Ultra-fast cooling technology is developed in recent years on an international hot-rolled strip for controlling the cooling of the new technology,appropriate controlled rolling with some other new technology,you can hot-rolled strip production process to achieve fast and accurate temperature control,so as to obtain the corresponding mechanical properties of phase change organizations and ideal.Int this paper,Shougang Jingtang 2250 hot rolling production line of ultra fast cooling project in the background.Precision control,temperature control of the control system model and algorithm,cooling water pressure and flow like a more systematic study.The main contents and results are as follows:(1)This paper Shougang Jingtang 2250mm hot rolling production line characteristics,require cooling after rolling control system,building a foundation for automation and control system platform.Detailing the hot strip ultra fast cooling mechanism related projects ultra fast cooling,process systems introduction.(2)This article focuses on the overview of ultra fast cooling system.Ultra-fast cooling system configuration,equipment and capabilities ultrafast cold made a thorough research for new ultrafast cold water systems are manifold and have made a study in this chapter;for the control of system functions provides the basis.(3)This paper,for ultra fast cooling after rolling device characteristics,analyze cooling system after rolling control principle,to establish control model and timing,to achieve better temperature control process.Headers flow and pressure to achieve high-precision control,using PID feedback control,the control method of cooling water coupling control related parameters.Steel cooling process several typical steel grades are calculated.(4)This paper describes the system developed by the human-machine interface,including after rolling and cooling control system the main picture and debugging interface;The research in this paper design of the control system in Shougang Jingtang 2250 hot rolling production line in practical application,including ultrafast cold water pressure and flow rate of the manifold;Analysis Pipeline(X70M,L415),steel wheels(380CL),high-strength steel(SBF700)several new kinds of steel during rolling temperature control of FDT,UFCT,CT;The principle of energy saving,according to steel grade,size,temperature and other conditions,to stop the different types of steel to open a different number of pumps to achieve energy-saving,water-saving purposes.By collating and analyzing data collected in the field it shows that ultrafast cold pressure this paper design,ultra fast cooling manifold flow and temperature control and stability to meet the requirements of ultra fast cooling process.