Automated break temperature determination of mould slags for the continuous casting of steel based on temperature-dependent viscosity data

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The continuous casting process of steels is mainly influenced by the infiltration of mould slag into thegap between the strand and the mould and the temperaturedependent solidification behaviour ofthe slag. Thus, measurements of the temperaturedependent viscosity and the determination of the break temperature, TBr, which is related to the formation of the first solids in the liquid slag, based on the recorded viscosity data are essential to characterizing mould slags. To enable automatic, person-independent data analysis method, a procedure must be developed that calculates TBr based on the log η versus 1/T representation. This aim was achieved by detecting the maximum absolute value of the second derivative of log η after regression and relating the associated
temperature to TBr; comparisons between these values and the manually determined values showed good agreement. Furthermore, the error was assessed by statistical analysis and the effect of sampling frequency was analysed.
Original languageEnglish
Pages (from-to)899-902
Number of pages4
JournalIronmaking and steelmaking
Issue number8
Publication statusE-pub ahead of print - 25 Jul 2019


  • Viscosity; mould fl uxes; break temperature; continuous casting; automatic detection; viscometer; statistic analysis; sampling frequency

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