Based on refining data of 110 t ladle refining furnace at Xinyu Steel Works

the prediction models for alloys adding amount and end analysis during refining of low carbon microalloying steels in ladle furnace have been established. 50 heats refining results show that the prediction results for adding amount of Xinyu Nol medium carbon chromium alloy and molybdenum iron alloy is basically accurate and the degree of accuracy for prediction value of end analysis of Cr and Mo in steel is more than 95%.