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|1. (WO2018105652) METHOD FOR EVALUATING VOLUME OF SLAG ON SURFACE OF MOLTEN METAL|
|Applicants:||NIPPON STEEL & SUMITOMO METAL CORPORATION
|Title:||METHOD FOR EVALUATING VOLUME OF SLAG ON SURFACE OF MOLTEN METAL|
This method for evaluating the volume of slag on the surface of molten metal includes: a preparation step of measuring the thickness of a plurality of pieces of slag having mutually different thicknesses, floating on the surface of molten metal in a container, and calculating the value of a density parameter having a correlation with the densities of pixels regions, in a captured image of the molten metal surface in the container, corresponding to the plurality of pieces of slag, in order to calculate in advance an approximate curve representing a correspondence relationship between the slag thickness and the density parameter; and a slag volume calculating step of calculating the volume of slag by calculating and integrating the slag thickness for each pixel on the basis of the density parameter for each pixel forming a captured image obtained by capturing an image of the molten metal surface to be evaluated, and on the basis of the approximate curve.