Rare metal vacuum distillation and purification intermediate frequency furnace

1. Working conditions of intermediate frequency furnace for vacuum distillation and purification of rare metals

1.1 Power supply: 380V±10% 50Hz three-phase, rare metal vacuum distillation purification intermediate frequency furnace total power: about 160KW

         Lighting and maintenance 220V±10% 50Hz single phase

1.2 Circulating water pressure: 0.15～0.25MPa; Flow rate: about 20m3/h

1.3 Inlet water temperature: ≤30℃

1.4 Ambient temperature: 5～40℃

1.5 Relative humidity: It can work and store under the condition of 90% relative humidity for a long time.

1.6 Altitude: ≤1000M

1.7 Furnace atmosphere: vacuum or reducing atmosphere, absolute pressure in the furnace: ≤0.11MPa

1.8 Dimension of intermediate frequency furnace for vacuum distillation and purification of rare metals: length 10000×width 6500×height 4700 (mm)

1.9 Absolute pressure of protective gas charging: ≤0.12MPa

2. Function description

2.1 Main technical parameters

2.1.1 The effective size of the furnace working constant temperature zone: Φ400×H1000(mm)

2.1.2 Working temperature: 1250C;

2.1.3 Heating requirements: the time from room temperature to 1250C is about 2 hours, and the heating process curve can be set arbitrarily.

2.1.4 The non-uniformity of the spatial temperature in the constant temperature zone: ±20C (measured by the standard temperature measuring ring)

2.1.5 The ultimate vacuum in the cold state of the empty furnace: 5×10-1Pa

2.1.6 Cold pressure rise rate of empty furnace: ≤2.5Pa/H

2.1.7 Time for pumping of empty furnace to reach ultimate vacuum: ≤60 minutes

2.1.8 Heating method: medium frequency induction heating

2.1.9 Intermediate frequency power supply: power 60Kw, frequency 4000Hz, intermediate frequency voltage 250-350V.

2.2 Function overview:

The rare metal distillation purification process is as follows: first use a high vacuum system to maintain a furnace vacuum of about 0.5Pa, and at a constant temperature of 1000C, the material on the tray is distilled to remove other impurities; then it is cooled with the furnace, and at the same time In order to improve production efficiency, inert gas can be introduced to accelerate the cooling of the material when cooling with the furnace. Special loading and unloading tools are used for loading, reclaiming and dumping of the material tray.

The complete set of rare metal vacuum distillation purification intermediate frequency furnace includes furnace tank, insulation system, induction heating system, vacuum system, tooling tray, working platform and furnace frame, intermediate frequency induction power supply system, water cooling system, control system, etc.

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