本文就盐浴炉目前普遍存在的鼓包、漏盐、开裂及启动时间长等问题，对一台180kW的三相半插入式中温盐浴炉进行了全面改造和测式．结果表明：采用立式砌筑方法砌筑坩埚可有效地防止鼓包、漏盐和开裂；而采用“回”字形中性导流板和螺旋状辅助电极，使启动时间由原来的8～10小时缩短为1．5小时，效果显著． In this paper, a 180kW three-phase semi-insert medium temperature salt bath furnace has been completely remodeled and tested for the problems of bulging, salt leakage, cracking and starting time that are common in salt bath furnace. The results show that: the use of vertical masonry method to build a crucible can effectively prevent the drum bag, salt and cracking; and “back” shaped neutral baffle and helical auxiliary electrode, the start-up time from the original 8 to 10 hours Shortened to 1.5 hours, the effect is significant.