MF Smelting Oven

I Description

This oven is of horizontal structure, touch screen displaying and controlling, adopting middle-frequency induction heating, for smelting various metal, metal alloy, as well as sintering non-metal material and high temperature material.

II Main features:

- Medium-frequency induction heating, energy saving

- Quick smelting speed, within 30 minutes testing

- Wide smelting temperature range, 500-1000℃

- Automatically smelting, pouring and casting

- Workable under several conditions: vacuum, vacuum  + gas atmosphere, shielding gas atmosphere only.

- HMI control, displaying every operation flow and working condition; data can be recorded and recalled.

- Whole stainless steel furnace body with water-cooling layer, outer surface temperature is less than 35℃, good safety protection.

- Equipped with one 8-station rotary platform for auto pouring and casting

- Equipped with secondary feeding device for adding materials during smelting

III Main technical data

No.	Item	Data
1	Autoclave size	Φ 1200mm x 1100mm
2	Ultimate vacuity	≤10Pa
3	Crucible capacity	10~25kg
4	Cycle time	One hour
5	Max. temperature	1000℃
6	Working temperature	650-850℃
7	Shielding atmosphere pressure	≤0.05MPa (Nitrogen,Argon)
8	Medium-frequency power	70kW
9	Total electric power	100kW
10	Graphite mould size	Φ 60mm x 150mm (H)
11	Control system	Omron PLC + HMI
12	Oven dimension	About 3200 x 1500 x 2000mm (L x W x H)
13	Oven weight	About 2000kg

IV Buildup and illustration

4.1 Autoclave

- Double-layer structure, with water-cooling interlayer

- Both internal and external walls are 304 stainless steel. Internal surface is mirror polished; External surface is hair-brush polished.

- Autoclave is fixed on base; Flange has sealing groove for O-ring vacuum seals which is equipped with water cooling as well for longer life.

- Backside has exhausting hole, vacuity gauge interface

- Side has rotary electrode device

4.2 Furnace cover (door)

- Double-layer tank-head structure, both internal and external are stainless, hair-brush polished

- Equipped with big-size viewing window for observing smelting condition inside

4.3 Vacuum system

- Comprised of one 2X-70 vacuum pump, high pressure vacuum valve, vacuity gauge and pipeline.

- Communication interface can transfer real-time data to touch screen

4.4 Heating power control system

- Adopts IGBT medium-frequency induction power

- With over-current and over-voltage protection

4.5 Water cooling system

- Cooling water to be provided by end-user

- Each cooling water circuit has separate flow adjusting valve

- Equipped with auto alarming and shut-off function owing to less-water-pressure or water-shortage

4.6 Smelting device

- There is induction coil on crucible external

- Auto pouring device

4.7 Secondary feeding device

- This device is equipped on the autoclave

- There is one rotary material cell for adding different elements

4.8 Rotary mould platform

- Mounted inside autoclave

- 8-station with 8 graphite moulds

- Sensor control station position

V Working conditions

- Transformer capacity required for each oven: 135kVA

- Workshop area occupation: about 3500 x 1350 x 1800mm

- Ambient condition should be clean, dry and good circulated

- Cooling water required: 7~8m3/h, 0.15-0.4MPa, temperature ≤30℃

- Compressed air: 0.4~0.6MPa, flow 3L/s

- Lift or crane: 3~5Ton