METHOD FOR PREDICTING CONTAMINATION RANGE OF MOLTEN STEEL WHEN SWITCHING LADLES

摘要

The present invention relates to a method for predicting the contamination range of molten steel when switching ladles, comprising the following steps: setting a casting amount (Q) after a first ladle has finished and the remaining molten steel amount (Qrm) of a tundish when starting a second ladle, respectively; calculating the casting amount (Qplug) when the contamination concentration becomes a set first reference value and the casting amount (Qpeak) when the contamination concentration becomes a set second reference value from the finishing point of the first ladle, respectively, using the remaining molten steel amount (Qrm) and the first proportional coefficient or the second proportional coefficient; obtaining the degree of contamination with respect to a specific casting amount by substituting the obtained casting amounts (Q, Qplug, Qpeak) and the remaining molten steel amount (Qrm) into a set linear and exponential function; and comparing the degrees of contamination obtained by the linear function and the exponential function to determine the smaller value as the degree of contamination by the specific casting amount.