Saving vacuum melting furnace, vacuum melting furnace in the traditional basis, the increase set up a furnace chamber and a lower furnace chamber mounted between the upper furnace chamber lid on the chamber to isolate the main furnace chamber and butterfly valves mounted between the bottom and the lower furnace chamber to isolate the main furnace chamber and the lower furnace chamber gate valve. Advantage in that before casting mold and a heater, crucibles and other high-temperature devices are gate valve isolated, but also infused with an inert gas, so that the mold and finished the cooling time is greatly shortened, when raw material inputs again when can effectively utilize waste heat from the main furnace chamber, not only energy savings of around 50 percent, and repeated dropping casting production efficiency can be increased by 50%. Model (vertical): ZG-25 First, the technical parameters 1, Rated temperature: 1600 ℃ Crucible capacity: 5,10,25,50,100,250 Kg pressure rise rate: <4 Pa / H Cold ultimate vacuum: 6.67 × 10-3Pa working vacuum: 6.67 × 10-2Pa Frequency: 2500 Hz Rated power: 100,200,300 Kw Rated voltage: 375 V inflation pressure <0.03 Mpa Second, the structure and composition 1, the furnace 2, lid 3 , oven rack 4, 5 vacuum system, cooling system 6, frequency power supply 7, the main electrode and rotary bearing operating mechanism 8, the induction coil 9, the bottom three, the structure of 1, the furnace: using double water sandwich structure, inner wall stainless steel (1Cr18Ni9Ti) material, polished inner wall, an outer wall of high-quality steel welding into a tube with a flange-type structure, opened flat flange seal groove, use "O" ring seal and let water cooled vacuum (to prevent overheating. " O "ring aging), suction hole and so on. And set up steps for easy operation. 2, the lid: the use of double water sandwich structure and flange head welding into a whole, the inner wall of stainless steel (1Cr18Ni9Ti) material, polished inner wall, an outer wall of high-quality carbon steel set water cooled, rotary observation window is provided, the locking device and so on. 3, bottom: the same water using double sandwich and cylinder head structure welding as a whole, which consists of casting platform or hole (long cast ingots) and set water cooling system, water-cooled ingot mold assembly, bottom outer welded uprights furnace and the furnace coupled support fixing. 4, oven rack: the steel plate welded into a group of cabinet structure, furnace placed in an oven rack. 5, induction coil: made from high quality rectangular copper winding inside the cooling water, to take over the coupling device peripherals. 6, cooling system: from a variety of valve pipes and other related devices composition and sound and light alarm function automatically cut off the heating power. 7. IF power: the use of 100Kw KGPS SCR frequency power supply, according to one with two-mode manufacturing reservation interface. 8, the main electrode and rotary bearing operating mechanism: the electrode, curved electrodes associated with the induction coil as a whole, through the handle operating mechanism to complete the casting process. 9, vacuum system: three pump configurations from one set 2X-70 rotary vane mechanical pump with a solenoid valve (to prevent pump oil due to a sudden power failure and intrusion), one Taiwan Roots pump ZJP-150, one of Taiwan TK-300 male chamber diffusion pump with cold trap (oil vapor into the cavity) ￠ 300 high vacuum valve, ￠ 80 manual valve, fill valve, release valve, pump and vacuum line connection using corrugated metal hose quick coupling (mitigation shock ), measuring the degree of vacuum is performed by complex vacuum gauge