真空誘導炉における湯漏れ検知システムの活用について

概要

論文の詳細を見る
As a furnace crucible refractory of Vacuum Induction Melting (VIM) furnaces, the precasting sleeve which had not been applied for the furnace having over 3 tons capacity has been applied for 3, 6, and 9 tons VIMs in Shibukawa plant, Daido Steel Co., Ltd. in order to increase its productivity. Daido had succeeded to increase lifetime of the precasting sleeve by couples of improvements, the composition of the material particle and the chemical composition, for example. On the other hand, the detection system of molten metal leak into the furnace refractory has been equipped for general VIM as the refractory lifetime judgment system to protect the induction coil and the insulator material. However the same system had been equipped for VIMs in Shibukawa plant for long time, it had a problem in detection accuracy and this was one of the major factors of inpede to increase the furnace refractory lifetime. A new detection system was installed in August 2004 in order to resolve this problem. However, there was also some difference between the system detection and actual value of the length of molten metal leak at the refractory replacement. Results of analyzing the factor that caused the differences and evaluation of the accuracy of the new system were reported in this paper.
電気製鋼研究会の論文