The production yoke the Jiang Su Dingfeng Furnace Equipment Co., Ltd. Nippon Steel, Wuhan Iron and high-quality cold-rolled silicon steel sheet of high magnetic permeability, stacked to ensure core quality production the dedicated positioning assembly welding and silicon steel, of Dingfeng furnace silicon steel column installed production project department the stack of-chip installed-platform, laminations assembled uses a arc-shaped Laminated Assembly Technique, processing of this structure pressed effect is good, magnetic flux leakage is less. More closely aligns the induction loop, to improve flux toward elimination of local magnetic flux saturation of the core in the seams, reducing the core of the no-load loss, no-load current, and make full use of silicon steel magnetic area, reducing the medium frequency induction smelting the the the possibility of of the furnace the furnace body local fever. The yoke cover of stainless steel plate and silicon steel contact portion spaced from the high-grade gold mica plate, the outer stainless steel clamped fixedly welded between the yoke and the stainless steel plate clamp is equipped with a special design of the copper heat pipe, or in the stainless steel plate is welded on the heat sink or radiator water cooling yoke to ensure that the upper yoke is in a normal condition, on both sides of the yoke with a 4-8 stainless steel Luo bolt retainer locking to avoid the temperature rise deformation cover more than 60% of the surface of the induction coil, the magnetic field lines gathered to the bath, to prevent the heating of the furnace shell, improve the efficiency of the system; stable performance also reliable support to the coil and to improve the overall strength of the furnace. Ding Feng electric furnace production of intermediate frequency furnace yoke (silicon steel column) in the production and before leaving the factory, strict quality control, process control to ensure the production quality of the silicon steel column before stacking the various parameters of the silicon steel were examined, and at the same time every a silicon steel sheet before stacking to go through visual inspection, through sink cooling brass through the withstand voltage and water experiments, the outer coating of DuPont Dote anti-arc insulating paint, effectively prevent the sub-section of the silicon steel Through magnetic, rust guarantee the quality of the silicon steel sheets of the yoke.