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       ZGS-3 is horizontal furnace, the rest are all vertical furnace.

       The furnace are mainly made up of furnace shaft, furnace binding, inductor, furnace tilting mechanism, vacuum system, forehearth operating cabinet and intermediate frequency power supply. Both the shaft and furnace cover are double water-cooled structure, the internal layer is stainless steel, the external layer is protected from rust by using high carbon steel, and the middle is used for water cooling. Alloy feeder head, revolving window, thermocouple measuring mechanism, feeding rod ( ZGS-50\ ZGS-150 and ZGS-200) and others are installed on the furnace cover.

      The induction coil is helical heterotype copper pipe. Shaped crucible or knotting crucible are put in the induction coil. Electrode rotary and crucible’s tilting are achieved by external manual or electric when casting.

      Vacuum system is made up of oil diffusion pump, Roots pump, mechanical pump, strainer and various control valves etc. Pneumatic operation baffle valve and digital vacuometer can switch over the high and low vacuum automatically. Intermediate frequency power supply includes IGBT and KGPS transistor. The first one has the features of energy-saving, space-saving and cooling-free, and the second one is of low cost in maintenance.