Independent Change Law of Mold Heat Transfer in Continuous Casting Based on Big Data Mining
Mold heat transfer has an essential influence on the initial formation of surface longitudi-nal cracks in slabs,and control over various process parameters in continuous casting is very important for achieving the desired qualified product.A study on the influence of parameters on mold heat transfer helps determine the law of mold heat transfer and realize fine control of the parameters.However,the cross-correlation between continuous casting parameters makes it difficult to identify the independent in-fluence of each parameter on the mold heat flux.Based on the parameters in the production process of continuous casting using big data mining and analytics,a new method for obtaining the independent ef-fect of each parameter on the mold heat transfer is proposed,namely the new method for independent process influence(IPI).The five links included in the IPI method can be calculated in turn:data prepro-cessing,cross-correlation level calculation,main related parameters testing,data filtering,and indepen-dent influence analysis.The results showed that,in addition to the conventional influence of the casting speed,superheat,slab width,mold taper,and total water flow on mold heat flux,the oscillation frequency,mold level,immersion depth of nozzle,stopper position,and argon blowing flow rate at different positions affected mold heat flux to a certain extent.The argon blowing flow rate of the stopper,stopper position,and immersion depth of the nozzle positively influence the mold heat flux.Conversely,the argon blowing flow rate of the nozzle,oscillation frequency,and total water flow rate have a negative influence.In addi-tion,for the argon blowing flow rate in the nozzle and total water flow rate,an inflection point is reached after achieving the maximum values of 3.5 L/min and 8250-8750 L/min,respectively.This research can provide a new reference and basis for the systematic mechanism analysis of the heat transfer process and formation of longitudinal surface cracks in continuous casting and services for the fine control of high-quality steel production on site.
万方数据
维普
