TW201716589A - An electron-beam vacuum refining furnace which can reduce the problem of crucible splash resulted from feeding actions of the material or scattering of the material out of the crucible, in order to obtain the electron-beam vacuum refining furnace capable of reducing the cost - Google Patents

Abstract

An electron-beam vacuum refining furnace includes: a refining furnace main body; an electron-beam unit, disposed in the upper region inside the main body of the refining furnace used to provide the electron beam; a crucible, disposed beneath the electron-beam unit; one feeding system, which is used to supply the material into the crucible and contains a feeding warehousing unit, a tilting duct unit, one transportation unit, where the feeding warehousing unit is connected to the tilting duct unit; wherein one side of the transportation unit is disposed beneath the tilting duct unit and the other side of the transportation unit comprises a cooling system, which is disposed above the crucible. Thus, the present invention can reduce the problem of crucible splash resulted from feeding actions of the material or scattering of the material out of the crucible, in order to obtain the electron-beam vacuum refining furnace capable of reducing the cost.

Description

Electron beam vacuum refining furnace

This invention relates to a vacuum refining furnace, and more particularly to an electron beam vacuum refining furnace.

High-purity metal materials are important key materials in many application fields, especially high-purity and high-melting refractory metal materials. They are important foundations for defense industry, aerospace industry, semiconductor industry and optoelectronic industry, and high melting point refractory. The metal material is very heat-resistant and wear-resistant, and its characteristics include more than 2000 ° C and high hardness at room temperature.

The industrial furnaces used in the industry for smelting minerals and smelting metals are commonly used in blast furnaces, electric furnaces, converters, and ferroalloy electric furnaces. In the non-ferrous metal industry, there are blast furnaces, reverberatory furnaces, horizontal converters, flash furnaces, etc., others such as induction furnaces. , electron beam vacuum refining furnace, etc., are also called smelting furnaces; and in many metallurgical smelting methods, for the refining and purification of high melting point refractory metal materials, electron beam melting method is a low pollution, high efficiency production The electron beam melting process is carried out under high vacuum in an electron beam vacuum refining furnace. The main advantages are that the melting speed can be adjusted within a large working range, the power density is high, the surface temperature of the molten pool is high, and the liquid holding time is long, so that the material The refining and purification functions are effectively carried out, and at the same time, during the smelting process, the material degassing, decomposing, The volatilization of impurities and the floating or precipitation of infusible impurities are excluded to achieve refining and purification of refractory metal materials.

Electron beam vacuum melting furnace can use gravity method to provide electron beam The feeding of the vacuum melting furnace, although the feeding system is simple and easy to operate in the design and production process, some defects in the feeding materials for different materials are as follows: 1. The material feeding port must be far away from the melting crucible Above, because for the refractory metal, the temperature of the melting crucible is very high, so the inlet must have a certain height to prevent the device purchase of the inlet from being deformed due to overheating; 2. The material is a block material. When feeding, because the high temperature makes the feed port a distance from the melting crucible, it is easy to cause splashing of the molten soup in the crucible when throwing the block material; 3. The material is granular or powder material for feeding. At this time, it is easy to have a distance between the feed port and the melting crucible, so that the granular or powder material is easy to fly outside the crucible; therefore, whether it is throwing a molten material from a block material, or throwing a granule or The material produced by the powder material is scattered outside the crucible, which will cause material waste and increase the frequency of maintenance of the device, resulting in extra large production costs.

Therefore, the industry is now in great need to develop an effective feed. The electron beam vacuum refining furnace can simultaneously solve the problem of melting spatter generated by throwing block materials, or throwing particles or powder materials to fly outside the crucible, so that it can simultaneously With cost and efficiency, it is possible to reduce the problem of splattering or material scattering outside the crucible due to the material feeding action, so as to obtain an electron beam vacuum refining furnace which can reduce the cost.

In view of the above disadvantages of the prior art, the main object of the present invention is to provide an electron beam vacuum refining furnace, which integrates a furnace body, an electron beam unit, a crucible, and a feeding system to prepare an electron beam capable of reducing cost. Vacuum refining furnace.

In order to achieve the above object, according to one aspect of the present invention, an electron beam vacuum refining furnace includes: a refining furnace body; an electron beam unit disposed in an upper region of the refining furnace body for providing an electron beam a feed system disposed below the electron beam unit; a feed system for providing material to the crucible, comprising a feed bin unit, a diagonal conduit unit, and a transport unit, the feed bin unit connecting the An oblique conduit unit; wherein one side of the transport unit is disposed below the diagonal duct unit, and the other side of the transport unit includes a cooling system disposed above the weir.

The feed bin unit may include a feed bin, an upper leak stop valve, a vacuum transfer chamber, a lower leak stop valve, an upper vacuum valve, and a lower vacuum valve, wherein the vacuum transfer chamber is disposed on the upper leak stop valve and Lower the leak between the valves.

In the invention of the present invention, the oblique conduit unit disposed under the feed bin unit and connected to the feed bin unit can be internally transported by gravity or a conduit transport mechanism, or can be transported by a vibration mechanism to avoid material retention. In the diagonal conduit unit.

The transport unit can comprise a metal conveyor belt made of metal, a main a moving axle, a passive axle, the metal conveyor belt is used for conveying materials to the crucible, and the metal conveyor belt can include a material receiving space, such as a groove structure or a socket, to transport the materials in batches; The unit side (the drive axle side) is disposed under the diagonal duct unit, and the other side (passive axle side) includes a cooling system disposed above the weir, the cooling system can be disposed on the passive axle, which can be The design consists of a closed water circulation mechanism for cooling the components of the transport unit on the side of the raft to avoid being affected by high temperatures. The closed water circulation mechanism of the cooling system can use copper as the pipe wall (not limited to this. ) to reduce the effects of radiant heat; the passive axle also includes a feeding mechanism that allows the material to slip smoothly into the crucible in a manner closer to the crucible.

The above summary and the following detailed description and drawings are It can further explain the ways, means and effects of this creation to achieve the intended purpose. Other purposes and advantages of this creation will be explained in the following description and drawings.

101‧‧‧Refiner body

102‧‧‧Electron unit

103‧‧‧Electron beam

104‧‧‧坩埚

11‧‧‧ Feed bin unit

12‧‧‧ Feed bin

13‧‧‧Upper stop valve

14‧‧‧Upper vacuum valve

15‧‧‧Vacuum transfer chamber

16‧‧‧Lower leak valve

17‧‧‧Under vacuum valve

18‧‧‧ diagonal conduit unit

19‧‧‧Transportation unit

21, 31‧‧‧ drive axle

22, 32‧‧‧Metal conveyor belt

23, 33‧‧‧ Passive axle

24, 34‧‧‧ cooling system

25, 35‧‧‧ material accommodation space

36‧‧‧Feeding agency

The first figure is a schematic diagram of an electron beam vacuum refining furnace according to the present invention; the first drawing is a schematic structural view of a transport unit according to an embodiment of the present invention; the first figure is a schematic structural view of a transport unit according to another embodiment of the present invention.

The embodiments of the present invention are described by way of specific examples, and those skilled in the art can readily understand the advantages and effects of the present invention from the disclosure of the present disclosure.

One of the main purposes of the present invention is to provide a feeding system for use in an electron beam vacuum refining furnace, thereby improving the feeding method in the prior art, so as to shorten the operating distance between the feeding device and the crucible crucible, and greatly reduce The loss of materials due to the feeding process, avoiding the waste of materials, especially for the electron beam melting furnace for refining high-purity materials, the price before the material refining is not high, thus reducing the loss of materials in the refining process, is a The economic process is important to improve the production process technology. At the same time, the invention can also improve the pollution of the furnace vacuum chamber caused by the lost materials, reduce the maintenance frequency of the furnace system, and avoid material contamination of the electron gun source, vacuum pumping motor, and control valve. And to achieve the extension of the life of the electromechanical system; the invention of the present invention can also effectively deal with the problems caused by the three types of materials such as block, granule and powder, and is an electron beam vacuum refining furnace capable of processing different material forms. Improve the efficiency of the electron beam vacuum refining furnace.

Please refer to the first figure for a schematic diagram of an electron beam vacuum refining furnace of the present invention. As shown in FIG. 1, the present invention provides an electron beam vacuum refining furnace comprising the following components: a refining furnace body 101, an electron beam unit 102 (which can emit an electron beam 103), a crucible 104, and a feeding system. Which should be The material system includes a feed bin unit 11, a diagonal conduit unit 18 and a transport unit 19, and the feed bin unit 11 further includes a feed bin 12, an upper leak stop valve 13, an upper vacuum valve 14, a vacuum transfer chamber 15, a lower leak stop valve 16, a lower vacuum valve 17 and the like; the electron beam vacuum refining furnace provided by the present invention may be a single high-purity metal material or two depending on the type of material required. Two or more high purity alloy materials, and thus the feed bin unit 11 may contain at least one or more feed bins 12.

The electron beam vacuum refining furnace provided by the invention has a furnace body The inner working needs to be a high vacuum environment. When the material enters the feeding bin 12, according to the production process demand, the upper vacuum valve 14 and the upper leakage preventing valve 13 can be opened (the upper vacuum valve 14 and the upper leakage preventing valve 13 can be controlled). The material enters the vacuum transfer chamber 15), and the material is freely dropped by gravity from the feed bin 12 into the vacuum transfer chamber 15 connected to the lower portion of the feed bin 12 (this cavity 15 can also be used as a different proportion of alloy material (material) The mixing chamber) can be closed to close the upper leakage valve 13 and the upper vacuum valve 14 to allow the gas in the vacuum transmission chamber to be discharged, and discharged to the pressure in the refining furnace body 101, the lower vacuum valve 17 and the lower The leak-proof valve is opened 16 to allow the material to enter the inclined conduit unit 18. The diagonal conduit unit 18 in this embodiment is for relieving the momentum generated by the gravity of the material, and the diagonal conduit unit 18 has a horizontal inclination angle (horizontal The angle of inclination is the angle of inclination with the vertical line of the ground surface, so the horizontal inclination angle 0 is vertical (free fall), usually the angle will be greater than 0), the horizontal inclination angle range can be designed from 1 degree to 40 degrees, and the material can be To reduce gravity The state of the impact, allowing the material to fall on the transport order in a more gradual manner On element 19, the material is then transported to the crucible 104 of the refining furnace.

If the material is free to fall into the shabu-shabu by gravity, although The production and operation of the material device are relatively simple and simple, but for the powder or granular materials, scattering may occur, and if it is a bulk material, the melting and splashing may occur, so the present invention introduces the oblique catheter The inclined design of the unit 28, which slows the acceleration of gravity, helps to improve the foregoing two situations. However, when the inclined conduit unit is tilted, part of the material may accumulate in the oblique conduit unit, so the present invention except the diagonal conduit In addition to the improvement of the placement method, vibration or catheter transmission mechanism can be added in the catheter, and the accumulation of some powder or granular materials can be effectively improved by vibration, or directly by the catheter transmission mechanism. The powder or granulated material is transported to the transport unit.

Please refer to the second figure for the transportation of an embodiment of the present invention. Schematic diagram of the unit structure. As shown in Fig. 2, the transport unit can be constituted by two rotating shaft wheels (21, 23) and a metal conveyor belt 22 having a material accommodating space 25, in this embodiment. The rotating shaft wheels are respectively the driving shaft wheels 21 to drive the metal conveyor belt 22 having the adapter (material receiving space 25) to move, and the bearing on the metal conveyor belt 22 is moved to the passive axle 23 by rotating, The material in the adapter is poured into the crucible, and the adapter can be designed as a metal container with an opening at the top and the front. When the position of the adapter is rotated at the passive axle 23, the opening of the adapter is located at the rotation point. Above the crucible, the material is gently poured into the crucible, wherein the cooling system 36 can be a closed water circulation mechanism In order to cool the component located near the side of the passive axle 23, to avoid being affected by high temperature, the closed water circulation mechanism of the cooling system can use copper as the pipe wall (not limited thereto) to be brazed. The method (not limited to this) completes the closed system to reduce the effects of radiant heat.

Please refer to the third figure, which is another embodiment of the present invention. Schematic diagram of the structure of the transmission unit. As shown in FIG. 3, when the material falls into the material accommodating space 35 on the metal conveyor belt 32 via the diagonal conduit unit, the structure and manufacture of the metal belt having the receiving function on the metal conveyor belt 32 can be simplified, and the rotating bolt can be used. And the concave metal sheet is superimposed on the metal conveyor belt 32 having a groove structure (material accommodation space 35). In addition, a feeding mechanism 36 can be designed at the passive shaft wheel 33, and the shaft wheel is used to fall on the metal. The material on the conveyor belt 32 is moved to the driven axle 33, and the material is poured from the groove structure into the metal feeding mechanism 36 by means of rotation. The feeding mechanism 36 (having a similar blade function can be used on the metal conveyor belt 32). The material is scraped off from the bottom up, and the material can be more smoothly slid into the crucible in a manner closer to the crucible. Since the passive shaft 33 has a cooling system, the metal feeding mechanism 36 is attached. The device is mounted on the passive shaft wheel 33 to avoid the influence of the high temperature of the melt on its performance.

The above-described embodiments are merely illustrative of the features and functions of the present invention and are not intended to limit the scope of the technical content of the present invention. Any person skilled in the art can modify and change the above embodiments without departing from the spirit and scope of the creation. Therefore, the scope of protection of this creation should be as listed in the scope of the patent application described later.

101‧‧‧Refiner body

102‧‧‧Electron unit

103‧‧‧Electron beam

104‧‧‧坩埚

11‧‧‧ Feed bin unit

12‧‧‧ Feed bin

13‧‧‧Upper stop valve

14‧‧‧Upper vacuum valve

15‧‧‧Vacuum transfer chamber

16‧‧‧Lower leak valve

17‧‧‧Under vacuum valve

18‧‧‧ Oblique conduit unit

19‧‧‧Transportation unit

Claims (9)

An electron beam vacuum refining furnace comprising: a refining furnace body; an electron beam unit disposed in an upper region of the refining furnace body for providing an electron beam; a crucible disposed under the electron beam unit; a system for providing material to the crucible, comprising a feed bin unit, an oblique conduit unit, and a transport unit, the feed bin unit connecting the diagonal duct unit; wherein the transport unit side is disposed on the tilt Below the duct unit, the other side of the transport unit contains a cooling system disposed above the weir. The electron beam vacuum refining furnace according to claim 1, wherein the feed bin unit comprises a feed bin, an upper leak stop valve, a vacuum transfer chamber, a lower leak stop valve, and an upper vacuum valve. And a vacuum valve. The electron beam vacuum refining furnace of claim 1, wherein the oblique conduit unit comprises a vibration mechanism or a conduit transmission mechanism. The electron beam vacuum refining furnace according to claim 1, wherein the transport unit comprises a metal transport belt, a drive axle, and a passive axle. The electron beam vacuum refining furnace according to claim 4, wherein the metal conveyor belt comprises a material accommodating space. The electron beam vacuum refining furnace of claim 1, wherein the cooling system is disposed on the passive axle. The electron beam vacuum refining furnace according to claim 6, wherein the passive axle further comprises a feeding mechanism. The electron beam vacuum refining furnace of claim 1, wherein the cooling system comprises a closed water circulation mechanism. The electron beam vacuum refining furnace according to claim 1, wherein the closed water circulation mechanism uses copper as a pipe wall to reduce the influence of radiant heat.