CN201211561Y - Vacuum intermediate frequency inducing smelting casting apparatus - Google Patents

Abstract

The utility model discloses a vacuum medium-frequency induction smelting-casting device in metallurgical smelting technology. The device has a smelting chamber and an ingot mold chamber, wherein the smelting chamber and the ingot mold chamber are in a split-type structure; the smelting chamber and the ingot mold chamber are connected through a fully-sealed graphite chute mechanism; and the position of the smelting chamber is higher than that of the ingot mold chamber. Compared with the prior art, the device solves the problem that a furnace body in large-sized vacuum medium-frequency furnace development is overlarge, and can guarantee the leak tightness and low pressure rise rate under high-vacuum conditions, so as to smelt and cast large-sized alloy ingots. The device is mainly applicable to smelting and casting nickel-base alloys, copper alloys, magnetic core materials in IT industry and other special alloys.

Description

Vacuum Medium frequency induction melting and casting device

Technical field

The utility model belongs to metallurgical melting technique, relates in particular to specific alloy melting and casting large-scale vacuum Medium frequency induction melting and casting device.

Background technology

The interpolation of alloying element need be carried out under high vacuum condition in the melting of some alloy and the process, as the core material of some Ni-based and acid bronze alloy, IT industry etc., must adopt the melting of vacuum Medium frequency induction.The producer of domestic present production vacuum middle frequency furnace mainly contains three families, wherein two families only produce the following electric furnace of 200Kg, one family produces the following vacuum middle frequency furnace of 500Kg, is used for non-ferrous metal, contains melting and casting that rare metal alloy and some core material etc. are worth higher alloy.Because be subjected to the influence of aspects such as metal material and technology, the vacuum intermediate frequency furnace capacity of production all is small-sized, and body of heater is single cell structure, with former melting and casting indoor the finishing that coexist.In traditional single cell structure, the ingot mould bottom need be lined with sandbox in stove, burns out smelting system, body of heater, cable etc. to prevent the ingot mould damaged metal liquid stream of hot top that breaks in stove, however, if this type of accident occurs, will cause to a certain degree damage to other system in the stove.Induction smelting system and ingot mould next-door neighbour, casting back ingot mould is emitted a large amount of width of cloth and is penetrated heat, to the scaling loss of induction coil insulation with water-cooled cable, need adopt the thermal protection layer of high request for preventing it, complex structure, cost is higher.The principal element that the production large vacuum furnace is restricted is: body of heater and bell process technology, melting crucible, electric current of intermediate frequency, vacuum discharge phenomenon etc., wherein body of heater and bell process technology are mainly to be subjected to one of restraining factors.Body of heater and bell discrete and horizontal two kinds are double-decker, and internal layer is a stainless steel, and skin is an ordinary carbon steel.Owing under vacuum condition, produce (10Pa below), and the body of heater internal-external temperature difference is big, then require body of heater, bell high mechanical strength and welding production technology must be arranged, as the generation gas leak phenomenon, the voltage rise rate is excessive, just can't ordinary production.Along with the increase of vacuum intermediate frequency furnace capacity, the body of heater size also strengthens thereupon, and its process technology difficulty is obviously increased, and easier generation is oozed, gas leak phenomenon.High speed modernization along with industries such as machinery, metallurgy, must use large-scale specific alloy ingot, otherwise will restrict development process to a certain extent, as metallurgy industry, each steel mill super wide plate base continuous casting that starts one after another, crystallizer broadside copper coin length reaches 4 meters, and every wide plate net weight reaches 1500Kg, needs the copper alloy billet weight above 3 tons; The continuous casting and rolling technique of sheet bar technology is able to fast development at home simultaneously, and its continuous casting crystallizer copper plate thickness is big, and net weight reaches more than the 1700Kg, needs billet weight about 3.5 tons, and domestic existing small size vacuum induction furnace is difficult to meet the demands.

Summary of the invention

Have above-mentioned defective for solving prior art, the purpose of this utility model is to provide a kind of furnace diameter little, and manufacture difficulty is lower, but the vacuum Medium frequency induction melting and casting device of casting large-scale alloy cast ingot.

For achieving the above object, the technical solution adopted in the utility model is: this vacuum Medium frequency induction melting and casting device has working chamber and ingot mould chamber, it is characterized in that: described working chamber and ingot mould chamber are split-type structural, be connected by hermetically sealed graphite chute mechanism between working chamber and two Room, ingot mould chamber, the position, working chamber is higher than the ingot mould chamber.

Described graphite chute mechanism has the graphite chute, and the graphite chute is lined with heat preserving and insulating material and refractory brick between graphite chute and the steel pipe in support is fixed on steel pipe.

Adopt the beneficial effect of technique scheme: the working chamber and the ingot mould chamber of this vacuum Medium frequency induction melting and casting device are split-type structural, have reduced device diameters and height significantly.The smelting apparatus owing to only pack in the working chamber, cylinder diameter can significantly dwindle, as long as its diameter can satisfy the turndown cast, calculates according to 5 tons of furnace gauges, can reduce diameter 1.8m, and owing to the reduction of diameter, removable spherical bell height also can reduce 0.6m simultaneously.Dispose by metal gravity flow requirement height between two Room in addition, casting chamber's local subsidence is installed in ground, like this with regard to the corresponding height that reduces working chamber's cylinder body of heater.Under high vacuum condition, work, vacuum drying oven is easy to seepage gas, influence operate as normal,, produce gas leakage if in processing and fabricating, do not note slightly, by the leakage of welding lining is very difficult, furnace diameter reduces, and has reduced manufacture difficulty, under the less relatively condition of diameter, through necessary technology means and special equipment, be to stop seepage gas phenomenon.Furnace diameter reduces, and relative curvature increases, and can bear bigger pressure, so body of heater can adopt the common material making, material thickness and the reduction of whole body of heater weight.Above-mentioned double-chamber structure alleviates weight of equipment, also uses general material, and fabrication and installation are easier, so the equipment total cost can reduce significantly.Because equipment size especially height reduces with single-piece weight, make factory, surpass the equipment that hangs, rush to repair simplification such as facility, accessory system such as bell mobile system, construction investment is low.Melting separates with ingot mould, can avoid the ingot mould damaged metal liquid stream of hot top that breaks to burn out smelting system, body of heater, cable etc. in stove, also can prevent to cast the back ingot mould and emit a large amount of width of cloth and penetrate heat, to the scaling loss of induction coil insulation with water-cooled cable.Easy to operate, dress mould and depanning are not subjected to other component affects, and be convenient and swift, and can adopt the large-scale alloy cast ingot of many ingot moulds cast.Be connected by hermetically sealed graphite chute mechanism between working chamber and two Room, ingot mould chamber, the position, working chamber is higher than the ingot mould chamber, and it is smooth and easy to flow when being beneficial to the metal liquid casting.

Below in conjunction with accompanying drawing specific embodiment of the utility model is described in further detail.

Description of drawings

Fig. 1 the utility model vacuum Medium frequency induction melting and casting apparatus structure schematic diagram.

Fig. 2 is the graphite chute A-A of a mechanism cross-sectional view.

The specific embodiment

Vacuum Medium frequency induction melting and casting device as shown in Figure 1 has working chamber 1 and ingot mould chamber 2, and working chamber 1 and ingot mould chamber 2 are split-type structural, is connected by hermetically sealed graphite chute mechanism 3 between working chamber and two Room, ingot mould chamber, and the position, working chamber is higher than the ingot mould chamber.The working chamber is made up of column body of heater 4 and spherical bell 5 two parts movably, column body of heater 4 structures are identical with the furnace binding of existing vacuum middle frequency furnace, be double-deck vertical structure, double-deck two interlayers of body of heater are provided with the steel plate water guide bar that can be used as fixed support, body of heater 4 is the forged steel circle with bell 5 contact-making surfaces, offer seal groove on the forged steel circle, silicone rubber O-ring is positioned at seal groove, removable crucible cover is installed on the column body of heater 4, enter electric inlet opening etc., spherical bell 5 is identical with the bell structure of existing vacuum middle frequency furnace, be portable double-decker, the same body of heater of material of spherical bell is equipped with the material alloying system on the bell, smash charge bar, temp measuring system and peep hole; Ingot mould chamber 2 is made up of column body of heater 6 and spherical bell 7 two parts movably, the structure of column body of heater 6 is identical with the furnace binding of existing vacuum middle frequency furnace, be double-deck vertical structure, two interlayers are provided with the steel plate water guide bar that can be used as fixed support, column body of heater and bell contact-making surface are the forged steel circle, offer seal groove on the forged steel circle, silicone rubber O-ring is positioned at seal groove, removable crucible cover is installed on the column body of heater 6, enter electric inlet opening etc., the structure of spherical bell 7 is identical with the spherical bell structure of working chamber, be portable double-decker, the same body of heater of its material, in the material alloying system is housed, smash charge bar, temp measuring system and peep hole are equipped with ingot mould adjusting device and peep hole.Graphite chute mechanism as shown in Figure 2 has the graphite chute, and the graphite chute is lined with heat preserving and insulating material and refractory brick between graphite chute and the steel pipe in support is fixed on steel pipe.

Claims (2)

1, a kind of vacuum Medium frequency induction melting and casting device, have working chamber and ingot mould chamber, it is characterized in that: described working chamber and ingot mould chamber are split-type structural, are connected by hermetically sealed graphite chute mechanism between working chamber and two Room, ingot mould chamber, and the position, working chamber is higher than the ingot mould chamber.

2, vacuum Medium frequency induction melting and casting device according to claim 1 is characterized in that: described graphite chute mechanism has the graphite chute, and the graphite chute is lined with heat preserving and insulating material and refractory brick between graphite chute and the steel pipe in support is fixed on steel pipe.

Images