TWM605507U - High performance vacuum furnace - Google Patents

Abstract

A high-efficiency vacuum furnace, comprising: a main body, a condensing hood, a feeding device, a first collecting pan, a second collecting pan, and a melting device; the body contains a first chamber space and an air extraction device at the top; the condensing cover It is arranged in the first chamber space and includes a heating device, a first evaporation tray, a second evaporation tray, and a third evaporation tray. The first evaporation tray is arranged at the top of the heating device, and the second evaporation tray and the third evaporation tray are arranged for heating On the device; the feeding device includes a feeding pipe and a feeding container, one end of the feeding pipe is connected to the feeding container, and one end is connected to the first evaporation tray; the first collecting tray is arranged under the condensation hood and connected to the first discharge pipe; The second collecting tray is arranged under the third evaporation tray and connected with the second discharge pipe; the melting device includes a feeding mechanism, one end of the feeding mechanism is connected with the melting device, and one end is connected with the feeding container.

Description

High-efficiency vacuum furnace

This model discloses a vacuum separation technology, especially the application of a vacuum separation technology in the field of metallurgy.

Scrap hardware, such as: scrap copper, scrap aluminum, scrap iron, scrap tin, etc. With the rapid economic development, the amount of scrap hardware has grown in an astonishing amount every year. Nowadays, with the shortage of natural resources and materials around the world, countries are also Begin to pay attention to metal recycling, and extract pure metal from scrap metal. The production cost is not only lower than that of primary metal, but also can make full use of secondary resources to supplement the current situation of insufficient metal mineral resources and avoid environmental pollution.

In the resource recovery and processing operations of various scrap hardware, however, the proportion of lead metal and bismuth metal in the tin-lead alloy is often high. The use of a vacuum distillation machine to remove lead metal and bismuth metal is currently known technology. At present, The main equipment used by metallurgists to realize the vacuum distillation and separation of alloys is the vacuum distillation furnace. The scrap metal feeding method is divided into solid feeding and liquid feeding. However, the disadvantage of the solid feeding method is that when it is poured into the vacuum distillation furnace, Only a fixed amount of material can be poured at a time. The vacuum distillation furnace can only process the next batch of materials after the batch of materials are processed. In contrast to the way of liquid feeding, by adjusting the amount of material and the input Time can achieve the goal of continuous production.

Therefore, how to create a device that can take into account the characteristics of continuous production, simple manufacturing process, and high metal recovery rate in the metallurgical process, and when the device is used in scrap tin, it can improve the separation of tin metal and other scrap metals, and more purify tin metal, It is a problem that the related industry urgently wants to solve.

In view of this, this creation is to provide a high-efficiency vacuum furnace, which includes: a main body, a condensing hood, a feeding device, a first collecting pan, a second collecting pan, and a melting device; the main body contains the first The chamber space, the top of the body contains an air extraction device; the condensation cover is arranged in the first chamber space and contains a heating device, a first evaporation tray, a plurality of second evaporation trays, a third evaporation tray, and a condensation cover The second chamber space is defined, the first evaporation tray is arranged on the top of the heating device, the second evaporation tray and the third evaporation tray are fixed on the heating device, and the first evaporation tray, the second evaporation tray and the third evaporation tray The discs are concentric with each other and are vertically stacked on the heating device at a fixed interval; the feeding device includes a feeding pipe and a feeding container, one end of the feeding pipe is connected to the feeding container, and the other end is connected to the first evaporation tray; At least one first collecting pan is arranged under the condensing hood and connected to the first discharge pipe; at least a second collecting disc is arranged under the third evaporating pan and connected to the second discharge pipe; a melting device including a feeder Mechanism, one end of the feeding mechanism is connected with the melting device, and the other end is connected with the feeding container.

In the high-efficiency vacuum furnace, the second chamber space further includes an evaporation pan cover, which is connected to the first evaporation pan, and the evaporation pan cover further includes an opening. The opening allows the first chamber space and the second The chamber spaces communicate with each other.

In the high-efficiency vacuum furnace, the second evaporation tray and the third evaporation tray are provided with perforations.

In the high-efficiency vacuum furnace, the second evaporation tray is provided with at least through holes.

In the high-efficiency vacuum furnace, the heating device is further connected to a flange, and the flange is used to create a space separation between the first chamber space and the second chamber space.

In the high-efficiency vacuum furnace, the first collecting tray and the second collecting tray include a plurality of spacer islands, and the first collecting tray and the second collecting tray are separated by a plurality of gaps by the spacer islands.

In the high-efficiency vacuum furnace, the temperature range in the first chamber space and the second chamber space is between 900 degrees Celsius and 1100 degrees Celsius.

In the high-efficiency vacuum furnace, a plurality of collecting pipes are installed on one side of the condensing cover, and the collecting pipes are arranged obliquely.

In the high-efficiency vacuum furnace, a cover is provided on the collecting pipe.

In the high-efficiency vacuum furnace, the feeding mechanism includes a control device.

The aforementioned and other technical content, features, and effects of this creation will be clearly presented in the following detailed description of the preferred embodiment with reference to the drawings. Before this creation is described in detail, it should be noted that in the following description, similar elements are represented by the same numbers.

First of all, please refer to Figure 1, which is a schematic diagram showing the high-efficiency vacuum furnace 1 of this creation. The high-efficiency vacuum furnace 1 of this creation includes: a main body 2, a condensation cover 3, a feeding device 4, at least one first collecting pan 5 and at least one second collecting pan 6. The main body 2 contains a first chamber space 21 inside. The top of the main body 2 contains an air extraction device 22. In terms of materials, the main body 2 is preferably made of metal or ceramic material. In terms of appearance, it can be a cylinder, It can be composed of any configuration such as cube and cuboid. In a preferred embodiment, the body 2 is a bell-shaped configuration; the air extraction device 22 is a motor, which can be divided into a DC motor and an AC motor. The DC motor can be any of a brush motor, a brushless motor, a stepping motor, etc.; if it is an AC motor, it can be any of an induction motor, a synchronous motor, etc.

Please refer to Figure 2, which shows another schematic diagram of the high-efficiency vacuum furnace 1 of this creation. In addition, in order to facilitate the operator to monitor the reaction in the high-efficiency vacuum furnace 1 of this creation, the main body 2 also includes a monitor The device 23 and the monitoring device 23 can be implemented as: an image capture device, an observation hole, if it is an image capture device, it is electrically connected to a display screen (not shown) for recording the data in the main body 2 If it is an observation hole, a holding part 231 is also connected between it and the main body 2 to provide the operator or related persons to observe and hold, and the holding part 231 is made of durable materials High-temperature materials, such as ceramic materials, metal materials, etc., are not limited here.

Please refer to Fig. 1 in conjunction with Figs. 2 and 8, which respectively show a schematic diagram of the high-efficiency vacuum furnace 1, another schematic diagram, and a three-dimensional schematic diagram of the heating device 31 of the present invention. The high-efficiency vacuum furnace 1 of the present invention also includes a condensing hood 3, which is arranged in the first chamber space 21, and includes a heating device 31, a first evaporation tray 32, and a plurality of second evaporation trays 33 , A third evaporation tray 34, the condensation cover 3 defines a second chamber space 35, the heating device 31 is designed as an electric column, which is electrically connected to a power generation equipment 9, the power generation equipment 9 provides electrical energy to the heating device 31, heating The device 31 converts electrical energy into heat energy for heating. Here, the temperature of the heating device 31 is adjusted through the power generation equipment 9 according to the characteristics of the material to be processed. The power generation equipment 9 further includes a transformer (not shown) to reduce the current from the external power source through the transformer. The transformer can be single-phase power supply, three-phase power supply, or star power supply. Here, Not limited. Among them, the electricity consumed for a single implementation of the high-efficiency vacuum furnace of the present invention is preferably 500 to 600 kWh/ton of raw materials into the furnace. It is worth mentioning that the heating device 31 further includes a temperature detection device (not shown). The temperature detection device learns the current temperature in the second chamber space 35, and then is linked with the power generation equipment 9 to perform Temperature control action. The condensing cover 3 and the heating device 31 are preferably made of a graphite material; in appearance, the heating device 31 is freely matched and composed of any configuration such as a cylinder, a cube, a cuboid, etc.; and the condensing cover 3 is preferably a bell Cover appearance.

For continuation, please refer to Figure 1 in conjunction with Figures 3, 4 and 5, which are a schematic diagram of the high-efficiency vacuum furnace 1 created by this creation and a three-dimensional schematic diagram of the first evaporation tray 32, the second evaporation tray 33, and the third evaporation tray 34 . The first evaporation tray 32 is arranged at the top of the heating device 31, the second evaporation tray 33 and the third evaporation tray 34 are fixed on the heating device 31, and the first evaporation tray 32, the second evaporation tray 33 and the third evaporation tray 34 are concentric circles, and are vertically stacked on the heating device 31 at a fixed interval. To further explain: the second evaporation tray 33 and the third evaporation tray 34 are provided with a perforation 37, through the perforation 37, the second evaporation tray 33 and the third evaporation tray 34 can pass through the heating device 31 and be sleeved on, and The second evaporation tray 33 is provided with a through hole 331, and the number of the through hole 331 can be one or more, which is not limited here; in terms of the shape, the through hole 331 can be any one of a circle, a square, a rectangle, etc. In addition, the material used for the first evaporation tray 32, the second evaporation tray 33, and the third evaporation tray 34 is preferably a graphite material; in terms of appearance, it is any structure such as a circle, an ellipsoid, a rectangular parallelepiped, and a cube. Freely collocation and composition. What’s more worth mentioning is that the high-efficiency vacuum furnace 1 of the present invention can add a second evaporation tray 33 and adjust the temperature of the heating device 31 according to the difference of the processed materials and the distillation speed. Here, there is no limitation. In a preferred embodiment, the number of the second evaporation tray 33 is 5 to 1, preferably 3 to 1, and most preferably 2; the temperature range in the first chamber space 21 and the second chamber space 35 is between Between 900 degrees Celsius and 1100 degrees Celsius, the temperature in the first chamber space 21 and the second chamber space 35 is preferably adjusted to 1000 degrees Celsius.

Please refer to Figures 1 and 2, which respectively show a schematic diagram and another schematic diagram of the high-efficiency vacuum furnace 1 created by this invention. The high-efficiency vacuum furnace 1 of this invention also includes a feeding device 4 and a melting device 8. The feeding device 4 includes a feeding pipe 41 and a feeding container 42. One end of the feeding pipe 41 is connected to the feeding container 42. The other end is connected to the first evaporation tray 32; in terms of appearance material, the feed tube 41 and the feed container 42 are preferably made of heat-resistant materials, such as ceramic materials, metal materials, etc., which are not limited here. The melting device 8 includes a feeding mechanism 81, one end of the feeding mechanism 81 is connected to the melting device 8, and the other end is connected to the feeding container 42. Preferably, the melting device 8 is a melting furnace for heating solid materials into liquid metal, wherein the amount of material poured into the melting device 8 at a time is preferably 8 to 12 tons; the feeding mechanism 81 includes a control device ( (Not shown), the control device includes a solenoid valve and a control switch. The solenoid valve is controlled by the control switch to adjust the flow rate and start and stop of the solenoid valve to realize the time and flow rate of the material flowing from the melting device 8 to the feeding container 42 The solenoid valve can be a direct-acting solenoid valve, a distributed direct-acting solenoid valve, a pilot solenoid valve or other similar devices.

Please continue to refer to Figures 1 and 2, the motor is running at high speed to draw out the air in the first chamber space 21, so that the first chamber space 21 inside the body 2 forms a vacuum state, and the feed pipe 41 generates a siphon The function is to suck the liquid material in the feed container 42 from the feed pipe 41 to the first evaporation tray 32. In a preferred implementation, the internal pressure of the body 2 will drop below 1 mmHg (1mmHg), preferably To drop to 0.6 mmHg (1mmHg).

Please continue to refer to Figure 1 in conjunction with Figures 6 and 7, which are a schematic diagram of the high-efficiency vacuum furnace 1 created for this creation, and a three-dimensional schematic diagram of the first collecting pan 5 and the second collecting pan 6. The high-efficiency vacuum furnace 1 of this invention includes a first collecting tray 5, which is arranged under the condensing hood 3, and is connected to a first discharge pipe 51; and a second collecting tray 6, which is arranged on the third evaporation tray 34 Below, it is connected to a second discharge pipe 61. The structure design not only allows the first collecting pan 5 and the first discharge pipe 51, and the second collecting pan 6 and the second discharge pipe 61 by means of a snap ring. To make the socket card and fix the connection, you can also use magnetic attraction, or add bumps and pits to achieve the same connection effect. The purpose is to make the collecting tray and the discharge tube more stable. , I only describe the implementation styles of the collecting tray and the discharge pipe, and the above examples are not limited. Furthermore, the first collecting tray 5 and the second collecting tray 6 include a plurality of spacer islands 7, and the first collecting tray 6 and the second collecting tray 6 are separated by a plurality of gaps by the spacer islands 7. The materials are flowed along the spacer island 7 to concentrate the refined materials from the collecting pan to the discharge pipe.

For continuation, please refer to Figure 1 in conjunction with Figure 10, which is a schematic diagram of the high-efficiency vacuum furnace 1 and a side schematic diagram of the condensing cover 3 created for this creation. Because this creation uses vacuum distillation technology to perform vacuum separation through the difference in the saturated vapor pressure of the scrap metal under different temperature conditions, according to this, in order to avoid the similar dew point between the materials and the impurities cannot be effectively separated, the second chamber The space 35 further includes an evaporation tray cover 36 connected to the first evaporation tray 32. The evaporation tray cover 36 further includes an opening 361 through which the first chamber space 21 and the second chamber space 35 are mutually connected. Connected, the temperature is slowly increased through the heating device 31, so that the metal elements with high vapor pressure are preferentially volatilized and condensed on the condensing cover 3, and the metal elements with low vapor pressure remain on the first evaporation tray 32, and the evaporation tray cover 36 The volatilization area of the material can be reduced to achieve a better separation effect.

Additionally, please refer to FIG. 1 in conjunction with FIG. 9, which is a schematic diagram of the high-efficiency vacuum furnace 1 and a three-dimensional schematic diagram of the flange 311 created by this invention. In a preferred embodiment, the heating device 31 is disposed on a base (not shown). The heating device 31 further includes a flange 311. The flange 311 is connected to the base and the heating device 31 to fix the heating device. The device 31 is on the base, and the flange 311 and the base are provided with a plurality of holes, and the holes are opposite to each other. The flange 311 makes the first chamber space 23 and the second chamber space 35 generate The space division allows the first chamber space 23 and the second chamber space 35 to communicate with each other through air passages, and the pressure can be adjusted quickly and consistently.

Please continue to refer to Figure 1. A plurality of collecting pipes 41 are installed on one side of the condensing hood 3. When the dew points of the metals contained in the materials to be processed are far from each other, the second evaporation tray 33 is added to extend the materials The distance from the first evaporation tray 32 to the collecting tray is used to increase the distillation and separation time of the material. According to this, the heating device 31 can slowly increase its temperature and expand the internal temperature range of the body 2, thereby reducing the dew point in the material The lower impurities are separated first, and the impurities with lower dew point will volatilize on the condensing cover 3 and slowly flow into the collecting pipe 41 along the wall of the condensing cover 3, and because the collecting pipe 41 is inclined, Therefore, the impurities can be collected more concentratedly, and the collecting pipes 41 are also connected to a pipe (not shown) for collecting the impurities into the container through the pipe for installation. In addition, the collecting pipe 41 is provided with a cover (not shown) and a solenoid valve. The solenoid valve controls the opening and closing of the cover on the collecting pipe 41. The solenoid valve can be a direct-acting solenoid valve and a distributed straight solenoid valve. Active solenoid valve, pilot solenoid valve or other similar devices. As the heating device 31 increases the temperature and reaches the dew point temperature of the metal to be collected, the cover on the collecting pipe 41 is closed to prevent the metal from flowing into the collecting pipe 41.

This creation will further illustrate the following embodiments, but it should be understood that these embodiments are only for illustrative purposes and should not be interpreted as limitations on the implementation of this creation.

>Example One>

Please refer to Figure 1 and Figure 2. First, the operator pours the solid tin-lead alloy into the melting device 8. Preferably, 8 to 12 tons of tin-lead alloy is poured, and the tin-lead alloy contains 3 % To 95%, antimony 20% to 25%, copper 0.01% to 0.1%, iron 0.01% to 0.1%, nickel 0.01% to 0.1%, arsenic 0.01% to 0.1%, and lead 50% To 75% of the alloy, what’s more worth mentioning is that for any material poured into the melting device 8, lead metal ÷ antimony metal ≧ 2; tin content ÷ copper impurity content ≧ 50; tin content ÷The sum of impurities (iron, nickel) content ≧1000. The solid tin-lead alloy is liquefied through the melting device 8, and the liquefied tin-lead alloy flows into the feeding container 42 through the feeding mechanism 81, and the air in the first chamber space 21 is evacuated by the air extraction device 22 to make the body 2 The internal first chamber space 21 forms a vacuum state to accelerate the flow of tin-lead alloy from the feed container 42 to the first evaporation tray 32.

When the tin-lead alloy liquid on the first evaporation tray 32 is full, the tin-lead alloy will flow along the edge of the first evaporation tray 32 into the second evaporation tray 33 and pass through the through holes 331 in the second evaporation tray 33 Flow to the third evaporation tray 34. As a result, the tin-lead alloy liquid flows from the top layer of the heating device 31 from the bottom to the bottom layer. The heating device 31 gradually heats the metal in the material. Since the saturation vapor pressure between arsenic and other impurities and tin metal and lead metal is very different, by adding a collecting pipe 41 to the condensation cover 3, the impurities with a lower dew point will volatilize on the condensation cover 3. Slowly flow into the collecting pipe 41 along the wall surface of the condensing cover 3 to separate impurities with a lower dew point. As the temperature of the heating device 31 rises and reaches the dew point of the lead metal, the aggregate is removed by a solenoid valve. The closure of the cap on the pipe 41 prevents the lead metal from being volatilized and condensed on the condensation cover 3 and stays in the collecting pipe 41, but allows the lead metal to flow along the wall of the condensation cover 3 to the first collecting pan 5 and pass through The first discharge pipe 51 is discharged, and then, the tin metal with a higher dew point will remain in the liquid phase and stay on the evaporation pan and flow to the second collecting pan 6 below, and be discharged through the second discharge pipe 61 to achieve Separation of tin and lead to extract pure tin metal and pure lead metal. Among them, tin content accounts for ≧99.3% of pure tin metal, antimony metals ≦0.2% of pure tin metal, and lead metals ≦0.5% of pure tin metal; The pure lead metal ≧99.7%, the impurity content accounts for the pure lead metal ≦0.3%; the temperature range in the first chamber space 21 and the second chamber space 35 is controlled between 200 degrees Celsius and 500 degrees Celsius. Preferably, The temperature range in the first chamber space 21 and the second chamber space 35 is controlled between 300 degrees Celsius and 500 degrees Celsius, the best, the temperature in the first chamber space 21 and the second chamber space 35 is 400 degrees Celsius ; The number of the second evaporation tray 33 is 5 to 1, preferably 3 to 1, and most preferably 2.

What’s more worth mentioning is that in response to the different metal content of the materials to be processed, the separation and crystallization device 1 of this creation also has a second embodiment, which is the continuation of the first embodiment, and the repetition will not be omitted here. To repeat,

>Example 2>

The operator can liquefy the tin-lead alloy into a low-temperature vacuum furnace before performing the operation of the high-efficiency vacuum furnace 1 of the present invention. Among them, the tin-lead alloy contains 60% to 70% of tin and 30% of lead. To 35% of the alloy, the same vacuum distillation technology is used to separate the tin-lead alloy, and the difference in the saturated vapor pressure of the scrap metal under different temperature conditions is used for vacuum separation, so that the tin-lead alloy can achieve the effect of deep delead. Obtain a tin-lead alloy with a tin content of 91% of pure tin metal and a lead content of 8% to 9% of pure tin metal. After that, the operator pours 91% of pure tin metal into the melting device 8.

When the tin-lead alloy liquid on the first evaporation tray 32 is full, the tin-lead alloy will flow along the edge of the first evaporation tray 32 into the second evaporation tray 33 and pass through the through holes 331 in the second evaporation tray 33 It flows into the third evaporation tray 34. As a result, the tin-lead alloy liquid flows from the top layer of the heating device 31 from the bottom to the bottom layer. The heating device 31 is gradually heated to separate the tin and lead. The tin metal with high saturated vapor pressure will volatilize and condense on the condensation cover 3 and flow along the wall of the condensation cover 3 into the first collecting pan 5, and be discharged through the first discharge pipe 51. The impurity metal ( Such as: copper metal, iron metal, or nickel metal) will remain in the liquid phase and stay on the evaporation tray, flow to the second collecting tray 6 below, and be discharged through the second discharge pipe 61 to achieve refined tin refining. Among them, The tin content accounts for 99.99% of pure tin metal, and impurities account for 0.01% of pure tin metal; the temperature range in the first chamber space 21 and the second chamber space 35 is between 900°C and 1100°C, preferably the first The temperature in the chamber space 21 and the second chamber space 35 is adjusted to 1000 degrees Celsius; the number of the second evaporation trays 33 is 5 to 1, preferably 3 to 1, and most preferably 2.

In summary, the advantages of the high-efficiency vacuum furnace 1 of this creation are as follows:

1. A monitoring device 23 is electrically connected to facilitate the operator to monitor the reaction in the furnace.

2. It is electrically connected to a temperature detection device, and the current temperature in the second chamber space 35 is obtained by the temperature detection device, and then it is linked with the power generation module to perform temperature control action.

3. The evaporation pan cover 36 can reduce the evaporation area of the material to achieve a better separation effect.

4. The flange 311 allows the first chamber space 21 and the second chamber space 35 to communicate with each other through air passages, the pressure can be quickly adjusted and consistent, and the heating device 31 can be fixed on the base.

5. Through the collecting pipe 41, the impurities with lower dew point in the material are separated first.

However, the above-mentioned are only the preferred embodiments of the present model, and should not be used to limit the scope of implementation of the present model, that is to say, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present model and the description of the model are all It still falls within the scope of this new patent.

1: High-efficiency vacuum furnace

2: body

3: Condensation hood

4: Feeding device

5: The first collecting tray

6: The second collecting tray

7: Space island

8: melting device

9: Power generation equipment

21: The first chamber space

22: Exhaust device

23: Monitoring device

31: heating device

32: The first evaporation tray

33: The second evaporation tray

34: The third evaporation tray

35: second chamber space

36: Evaporation pan cover

37: Piercing

41: feed pipe

42: feed container

51: The first discharge tube

61: The second discharge pipe

81: Feeding organization

231: Grip

311: Flange

312: Collecting pipe

331: Through Hole

361: hole

Figure 1 is a schematic diagram showing the high-efficiency vacuum furnace of this creation;

Figure 2 is another schematic diagram showing the high-efficiency vacuum furnace of this creation;

Figure 3 is a three-dimensional schematic diagram showing the first evaporation tray of this creation;

Figure 4 is a three-dimensional schematic diagram showing the second evaporation tray of this creation;

Figure 5 is a three-dimensional schematic diagram showing the third evaporation tray of this creation;

Figure 6 is a three-dimensional schematic diagram showing the first collecting tray of this creation;

Figure 7 is a three-dimensional schematic diagram showing the second collecting tray of this creation;

Figure 8 is a three-dimensional schematic diagram showing the heating device of this creation;

Figure 9 is a three-dimensional schematic diagram showing the flange of this creation;

Figure 10 shows the side view of the condensing cover of this creation.

1: High-efficiency vacuum furnace

2: body

3: Condensation hood

4: Feeding device

5: The first collecting tray

6: The second collecting tray

8: melting device

21: The first chamber space

22: Exhaust device

31: heating device

32: The first evaporation tray

33: The second evaporation tray

34: The third evaporation tray

35: second chamber space

41: feed pipe

42: feed container

51: The first discharge tube

61: The second discharge pipe

81: Feeding organization

311: Flange

312: Collecting pipe

Claims (10)

A high-efficiency vacuum furnace includes: a body containing a first chamber space inside; the top of the body contains an air extraction device; a condensing hood, which is arranged in the first chamber space and includes a heating Device, a first evaporation tray, a plurality of second evaporation trays, a third evaporation tray, the condensing cover defines a second chamber space, the first evaporation tray is arranged on the top of the heating device, the second The evaporation tray and the third evaporation tray are fixed on the heating device, and the first evaporation tray, the second evaporation tray, and the third evaporation tray are concentric with each other and are vertically stacked at a fixed interval. On the heating device; a feeding device comprising a feeding pipe and a feeding container, one end of the feeding pipe is connected to the feeding container, and the other end is connected to the first evaporation tray; at least one first collecting tray is provided Under the condensing hood, it is connected to a first discharge pipe; and at least one second collecting tray is arranged under the third evaporation tray and connected to a second discharge pipe; a melting device including a feeding mechanism One end of the feeding mechanism is connected with the melting device, and the other end is connected with the feeding container. The high-efficiency vacuum furnace according to claim 1, wherein the second chamber space further includes an evaporation tray cover connected to the first evaporation tray, and the evaporation tray cover further includes an opening through which the opening The hole makes the first chamber space and the second chamber space communicate with each other. The high-efficiency vacuum furnace according to claim 1, wherein the second evaporation tray and the third evaporation tray are provided with a perforation. The high-efficiency vacuum furnace according to claim 3, wherein the second evaporation tray is provided with at least one through hole. The high-efficiency vacuum furnace according to claim 1, wherein the heating device is further connected to a flange, and the first chamber space is separated from the second chamber space by the flange. The high-efficiency vacuum furnace according to claim 1, wherein the first collecting tray and the second collecting tray contain a plurality of spacer islands, and the first collecting tray and the second collecting tray are made by the spacer islands. The two collecting trays are separated by a plurality of gaps. The high-efficiency vacuum furnace according to claim 1, wherein the temperature range in the first chamber space and the second chamber space is between 900 degrees Celsius and 1100 degrees Celsius. The high-efficiency vacuum furnace according to claim 1, wherein a plurality of collecting pipes are installed on one side of the condensing hood, and the collecting pipes are inclined. The high-efficiency vacuum furnace according to claim 8, wherein a cover is provided on the collecting pipes. The high-efficiency vacuum furnace according to claim 1, wherein the feeding mechanism includes a control device.

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