小型有色金属铸件工段常用0.4-Cl型有芯感应炉熔炼铜及其合金。这类炉的感应器初级线圈使用具有双层耐热绝缘层(玻璃纤维和硅有机漆)的牌绕组线制成。初级线圈和感应器用14-46No.2风机通过通风沟抽送空气冷却。现在广为使用的这类感应器初级线圈见图a,使用寿命只有2～2.5个月,因为导电片绝缘损坏必须更换,不然会导致感应器线圈击 Small non-ferrous metal casting section commonly used 0.4-Cl core induction furnace melting copper and its alloys. The inductor primary coils of this type of furnace are made from brand winding wires with double layers of heat-resistant insulation (glass fiber and silicone organic paint). Primary coils and inductors are cooled by air through a ventilation slot with 14-46No.2 fans. Now widely used in this type of inductor primary coil shown in Figure a, the service life of only 2 to 2.5 months, because the conductive sheet insulation damage must be replaced, otherwise it will lead to sensor coil hit