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我厂用500公斤无芯工频感应电炉生产碳素钢、合金钢精铸件,过去一直采用焊接钢模筑炉的旧工艺,这种工艺费电、费时、费钢材。从一九七三年开始,采用了脱模筑炉、直接熔炼的新工艺,革了旧工艺(焊接炉衬、长时间烘炉)的命,对炉子进行大修和中修。这样,能节约烘炉用电,节约钢板,节约制作钢模工时,中修一次炉龄可达15炉左右,最高20炉,大修一次炉龄可达150～200炉。改进后,钢水质量符合要求。几年来,没有因采用这种新工艺而发生过设备事故。
I plant with 500 kg coreless frequency induction furnace production of carbon steel, alloy steel casting, the past has been used to build furnace welding steel mold of the old technology, this process costs electricity, time-consuming, fee steel. Since 1973, the new technology of demoulding and building furnace and direct smelting has been adopted to revolutionize the life of the old process (welding lining and long time oven) and to overhaul and repair the stove. In this way, can save the oven power, saving steel, saving the production of steel mold workers, repair a furnace up to about 15 furnaces, up to 20 furnaces, overhauling a furnace up to 150 ~ 200 furnaces. After improvement, the quality of molten steel meets the requirements. In the past few years, no equipment accidents have occurred due to the adoption of this new process.