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Vacuum Induction Melting Furnace

High Temperature Vacuum Induction Melting Furnace, Medium Frequency up to 2000℃

This vacuum induction melting furnace adopts the theory of medium frequency induction heating and builds a high vacuum system so that the metal can be melted under a high vacuum situation. This furnace is widely used in many kinds of research and production, such as nickel and special steel, precision alloy, activity metal, high temperature alloy, magnet material, etc. Also suitable for the vacuum precision cast of small parts.

Adopt IGBT or KGPS medium frequency power supply, the max temperature is 2000℃.
The vacuum system is composed of a mechanical pump, roots pump, and diffusion pump, the max vacuum level is 7×10^(-3)Pa.
The alloy feeder is built inside. The material can be fed into the melting crucible by operating the feeder handle.
The furnace cover is equipped with an observation window, easy to observe the performance of the furnace.
An induction heater consists of a rectangular copper tube, through the two mating nuts fixed on the electrode, easy to disassemble.
The crucible could be placed inside the inductor. The crucible material should follow the melt alloy type.

Working video: auto-mixing during melting (after auto-feeding)

2 vacuum induction melting furnaces were delivered to our European customer in August 2022.

Vacuum Induction Melting Furnace on customer’s site:

Technical Specifications of Vacuum Induction Melting Furnace:

Technical Specifications for 20kgs
Crucible effective volume			4L
Crucible effective capacity (Steel)			20kgs
Max temperature			2000 ℃
Max melting vacuum			● 7×10-3Pa ● Vacuum time: open the diffusion pump when preheating is complete, then up to 7×10-3Pa in 30 minutes.
Rated power			60KW
Rated voltage			375V
Power frequency			50HZ
Rated frequency			1500~2500HZ
Heat element			Induction copper coil
Vacuum system			● 70L/s Double-stage Rotary vane mechanical pump ● Dia.300mm diffusion pump, Max. pumping speed: 5000L/s ● Dia.300mm diffusion pump clod trap, effective cooling cycle for pump oil ● Dia.300mm diffusion pump flapper valve + Dia.80mm former pump flapper valve ● Stainless pipe + stainless bellows
Furnace Structure

Vacuum furnace shell		● The Furnace Shell is a vertical cylinder with double layer water-cooling, 304 stainless steel inner was mirror polished; the outer was rolled by carbon steel. ● Double layer water-cooling arched furnace cover. Equipped with two tension springs, used to balance the weight. You can open the cover easily. When it’s locking, two tension springs can also provide furnace cover airtight pressure to ensure good sealing.
Electrode		● The electrode is located on the left side of the furnace shell. It can work as a power supply for induction heating electrodes and as a fulcrum of induction heaters and Crucible. ● Electrodes mounted on Sealed bearings, when needed tilting crucible, the worker can operate the handle to pour the liquid steel.
Alloy feeder		● The alloy feeder is located in the center of the cover. Inside the feeder is divided into six cubicles (the material of one cubicle is placed in the tipping bucket), the material can be fed into the crucible in the vacuum or protective gas. ● When turning the feeder hand wheel every 60 degrees, there is one cubicle material that falls into the tipping bucket inside the furnace cover. ● The feeding tipping bucket is equipped with a damping plate to prevent materials falls too quickly. When in use, gently shake the joystick (outside the furnace cover), and you can control the speed and quantity of the material falls into the crucible
Observation window		● The furnace cover is equipped with an observation window, easy to observe the performance of the furnace. ● An active shutter is installed on the observation window, preventing the glass from burning broken and getting dirty by the steam accumulation of metal. ● The shutter moves away shortly only when observing, controlled by the handle outside the furnace cover.
Induction heater		● Induction heater consists of a rectangular copper tube, through the two mating nuts fixed on the electrode, easy to disassemble. ● Pre-sintering molding crucible can be placed inside. You can also make the crucible according to the inductor’s inner wall. The material of the crucible is up to the melting metal. ● In front of the sensor, at the bottom of the furnace shell (where place the ingot mold), there is a circular pipe. On the pipe, there is a circular shelf to place ingot mold. Normally, ingot mold is placed on this shelf. When you need to cast the slender ingot, the ingot mold will be high, you can remove the shelf put the ingot mold into the circular pipe, and place it on the water-cooling cover. If you have some special needs, you can replace the water-cooling cover with a suitable water-cooling ingot mold room.
Temperature measuring		On the right side of the furnace exhaust pipe is fitted with a temperature-measuring device. When you need to measure temperature, just pull up the spring latch, and turn the handle, and the thermocouple tip will be inserted in the liquid metal. Quartz protecting tube for thermocouples prepared by the user.
Medium frequency power supply and Water-cooling		● Medium frequency power supply is a 1500-2500Hz, 50KW thyristor medium frequency equipment. To compensate for the low power factor, the system is equipped capacitor. ● The medium frequency current of the furnace was sent to the inductor through the outside bus-tie and water-cooled medium frequency cable. Cooling water of medium frequency cable was directed by a control valve on the furnace base.
Vacuum system		● Vacuum system directly connects to the exhaust port on the furnace shell. The system includes an oil vapor diffusion pump, a two-stage rotary pump, a valve, a pipeline, etc. ● The vacuum system has a 0-0.1Mpa pressure gauge, to check the rough vacuum and negative pressure of the protective atmosphere.

Standard Size:

Model	Capacity	Power	Model	Capacity	Power
BR-VM-5	5kg	40KW	BR-VM-50	50kgs	150KW
BR-VM-10	10kgs	40KW	BR-VM-100	100kgs	250KW
BR-VM-20	20kgs	60KW	BR-VM-300	300kgs	500KW
BR-VM-25	25kgs	75KW	BR-VM-500	500kgs	700KW

*Other sizes can be customized

Learn more:

Successful Installation of Vacuum Induction Melting Furnace in Turkey

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