DE3602244C1 - Vacuum induction furnace for the heating and treatment of metal melts - Google Patents

Abstract

To improve a vacuum induction furnace, consisting of a base part comprising a furnace frame with induction coil and magnet yoke, and also of a melting vessel with lid which is exchangeably mounted in the furnace frame, and of a hood covering the vessel mouth together with lid and supported in a sealed manner on a ring surrounding the melting vessel, and in which furthermore a pot-shaped outer vessel surrounding the melting vessel and composed of refractory non-magnetisable, heat-insulating material is arranged, the outer vessel is surrounded by the induction coil without play, the ring is laid in a sealed manner against the outside of the mouth rim part of the outer vessel with axial clearance from the inductance coil, and that the outer vessel has a gas-tight jacket, in such a way that the area of application can be extended, suspension means (27) are arranged on the furnace frame (9) above the centre of gravity of the furnace, and all of the supply lines leading to the furnace are connected by means of detachable plug-in couplings. <IMAGE>

Description

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arranged by the rim 16, ring-shaped, the outer • let 10 comprehensive cooling device 23 made of austenitic

schcni steel arranged. One similar to the latter The cooling device 24 comprises the area of the outer vessel 10 located below the induction coil.

In addition, below the frame plate 12 there is a cooling device which acts on the bottom 11 of the outer vessel 10 25 arranged. In particular, gaseous coolant is fed to the cooling devices.

To further increase the heat gradient from the inside to the outside, the outer vessel 10 has a lining 26 made of micanite.

In order to be able to use the entire furnace as a portable pouring ladle, 9 are on the frame above of the furnace center of gravity suspension devices 27 arranged by several on the circumference of the frame 9 distributed eyelets is formed. Furthermore, all supply lines leading to the furnace are on Furnace connected by means of detachable plug-in couplings (not shown).

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Claims (1)

1 2 patent claims furnace leading supply lines are detachably connected to the furnace, preferably also supply 1. Vacuum induction furnace for heating and supply lines on the furnace using plug-in couplings metallic melts, consisting of closed. As a result, it is now possible to a stationary part, which apart from the load-bearing furnace can be used as a transportable pouring ladle for the Furnace frame to degas the cooled melt arranged on this, for example, being ensured Induction coil and the outside enclosing it is that during transport and also for example includes the magnet yokes, as well as from a heat furnace frame during the degassing of the melt interchangeably stored, losses are to be feared for themselves. transportable, dimensionally stable melt material vessel io An embodiment of the invention is in the shown with lid made of refractory material and from a drawing and will be for more in the following the vacuum-tight seal of the receptacle coins. The drawing shows a vacuum induction furnace in the stood overarching hood, attached to a longitudinal section. Fitted with sealing cutting edges, the melt vessel 15 This vacuum induction furnace comprises a base part comprehensive wreath tightly supported, at 1 and one transportable separately from the latter which also has a fixed to the frame, only part 2. The latter consists of a circular ring Open at the top, the melting material vessel encompassing without play any cross-sections having melt material vessel 3 with iron end Outer vessel made of a fireproof, non-magnetic snout 4 and a mouth that can be closed, Heat-insulating material arranged cover 5. The melting material vessel 3 including Schnaunet is, the outer vessel of the cooled induction ze 4 and cover 5 are made of ceramic ramming mass tion coil is included without play, the wreath is made with. The melt vessel 3 is in its unteaxial Distance from the induction coil on the outside of Ren area tapers conically towards its bottom 6 the mouth edge part of the outer vessel is designed to be tight. is applied closing, and that the outer vessel 25 in the lid 5 is a peephole 8 is arranged,
having a gas-tight enclosure, according to the Schmelzgußgefäß 3 is in a furnace at the frame 9 35 24 714. characterized in that hanging devices tamped to a stable position on the furnace-mounted outer vessel 10 virtually free of play and detachable (9), which extends upwards to under the Schnau-hangings of the entire furnace ze 4 of the outer vessel 10. The pot-shaped and that all of the supply lines leading to the furnace 30 outer vessel 10 also have circular cross-sections are detachably connected to the furnace. cuts, is also made from ceramic ramming material. Vacuum induction furnace according to claim 1, provided and supported with its base 11 on one characterized in that the supply line frame plate 12 is supported. connected to the furnace by means of plug-in couplings- The bottoms 6 and 11 are each thicker than the side sen are. 35 walls of the melt vessel 3 or the outer vessel 10 formed. Description The outer vessel 10 including the bottom 11 has an inseparable attached and over its entire outside and The invention relates to a vacuum induction furnace, if necessary inside extending, gas-tight for the heating and treatment of metallic smelting 40 envelope 13 made of plastic and is of a on Gezen, consisting of a stationary part, held outside of the supporting furnace frame, for example, coolable with water , which comprises the induction coil 14 with magnet yokes 15 arranged thereon, with the cooled induction coil and the magnet yokes surrounding it on the outside comprising the induction coil 14 on the outer vessel envelope 13, as well as from one in the furnace directly and without play,
45 For the vacuum-tight closure of the vessel mouths, dimensionally stable molten material vessel with a lid made of fire-resistant material on the outer vessel 10 above the induction coil 14 and of a material that is solid for the vacuum-tight and axially spaced from the latter is a vessel closure the vessel mouth certain, the latter including mouths encompassing ring 16 tightly closing beDeckel with distance overlapping hood, which is fastened to. one equipped with sealing cutting edges, the melting material 50 the latter has a circumferential sealing cutting edge 17 on wreath encompassing the vessel is tightly supported, in which a gas-tight and with a ring seal 18 which is also supported by a hood 19, which is held fixed to the frame and is only fitted at the top. fenes. The outer shell, which virtually encompasses the molten material vessel, is attached to the rim 16 to seal it The vessel is made of refractory, non-magnetizable, heat-insulating circumferential gland seal 20, which is known per se, the outer vessel of 55 type is supported, the sealing means of which is enclosed without play on the casing 13 of the cooled induction coil, which is tightly attached to the outer vessel 10.
Wreath at an axial distance from the induction coil The stuffing box seal 20 is below the outer on the outside of the mouth edge part of the outer vessel ßengefäßmünde and at an axial distance from this is applied tightly, and that the outer vessel is arranged. has a gas-tight envelope, according to patent 60 Above the gland seal 20 is within 24 714. of the ring 16 an annular and on its inner The invention is based on the object of providing the cooling device 21, which may be adjacent, with radial variations of the induction furnace described above still stood from the outer vessel 10. The one above to better utilize, namely its application area between the stuffing box seal 20 located annular space to expand. 65 see the outer vessel and the cooling device 2Ü is This object is achieved in that the furnace is filled with silicone potting compound 22,
set hanging devices for stable hanging between the ring 16 and the induction coil ^ of the entire furnace are arranged and that all of the is adjacent to the latter one with an axial distance