我厂自1966年试制成功并开始使用铁坩埚无芯工频感应电炉熔化铝、锌等有色金属后,经过五年的生产实践验证,它的确是一种比较理想的有色金属熔炼设备。但过去所用者皆为单相电炉,在炉小台多的条件下,分相接炉对三相供电平衡问题并不突出,如仅需一、二台较大的此类电炉,则三相供电不平衡并因此而带来的困难,就成了突出的矛盾。为此,我厂革命职工遵照伟大领袖毛主席关于“中国应当对于人类有较大的贡献”的教导,按照实践、认识、再实践、再认识的唯物辩证的哲学思想,从1969年下半年开始,进行了 I plant since the successful trial in 1966 and began to use iron crucible core frequency induction furnace melting aluminum, zinc and other non-ferrous metals, after five years of production practice verification, it is indeed an ideal non-ferrous metal smelting equipment. However, in the past, all of them were single-phase electric furnaces. Under the condition of small number of small furnaces, the problem of three-phase power supply balance by phase-split furnaces did not stand out. If only one or two large electric furnaces of this type are required, The imbalance in power supply and the resulting difficulties have become prominent contradictions. To this end, the revolutionary workers of our factory follow the teachings of Chairman Mao, the great leader, on “China should make greater contribution to mankind” and follow the materialist dialectical philosophical thinking of practice, understanding, re-practice and re-understanding from the second half of 1969 ,Conducted