有色金属(铜、铅、锌)及其合金的熔化铸造,是当代机器制造业中的耗能大户。为寻求节能途径,提高电效率,阜新市电子设备厂从理论上分析和计算了使用石墨坩埚作无芯感应炉发热体熔化有色金属。其电效率可达90％以上,功率因数大为提高。用这种炉子来熔化任何金属,其功率和电效率均无甚变化。在整个熔炼过程中,从冷炉到熔化,输出功率都很 Non-ferrous metals (copper, lead, zinc) and their alloys are melt-cast and are major consumers of energy in the modern machinery industry. In order to seek ways of saving energy and improve the electrical efficiency, Fuxin Electronic Equipment Factory theoretically analyzed and calculated the use of graphite crucible as coreless induction furnace heating element to melt non-ferrous metals. Its electrical efficiency up to 90%, power factor greatly improved. With this furnace to melt any metal, the power and electrical efficiency of little change. Throughout the melting process, from the furnace to the melting, the output power is very