Abstract
Given the deficiencies of the present test methods of mold powder melting rate, a method based on the copper bath was established in this study. The correctness and reproducibility of this method were verified. The relative standard error was less than 5%. The effect of carbonaceous materials and powder granule size on the melting rate was investigated by this method. The results show that: (1) The melting rate of mold powder decreased with increasing carbonaceous materials content. (2) Besides carbonaceous materials, the powder granule size also affected the melting rate. The melting rate of the mold powder for high-nitrogen stainless steel increased with increasing granule powder size. The use of powders in the steel plant was consistent with the experimental results. The larger the proportion of larger than 0.5 mm granules in the powder, the thicker the liquid slag layer, and the higher the qualified rate of slab quality.KeywordsContinuous castingMold powderCarbonaceous materialsGranule sizeMelting behavior
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