Vacuum distillation device for metal purification

Abstract

The invention relates to the technical field of metal purification, in particular to a vacuum distillation device for metal purification, which comprises a tank body sealing mechanism, a vacuumizing mechanism arranged on the tank body sealing mechanism, and a sealing cover arranged on the vacuumizing mechanism, the material placing assembly is arranged in the vacuumizing mechanism and is transversely arranged; the pressurizing mechanism is arranged in a cavity in the vacuumizing mechanism; the tank body sealing mechanism comprises a bottom cover and a first air pipe mounted in the bottom cover; the vacuumizing mechanism comprises a pressure-resistant outer cylinder installed on the bottom cover and a cushion block installed outside the pressure-resistant outer cylinder. By arranging the bottom cover, the pressure-resistant outer cylinder and the top cover which are of an assembled structure, when the interior of a tank body formed by the three assemblies is divided into two vacuum environments by the negative pressure gaskets, metal mixtures can be freely converted between low vapor pressure and high vapor pressure, and meanwhile efficient evaporation separation of light component substances and heavy component substances under different vapor pressures can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of metal purification, in particular to a vacuum distillation device for metal purification. Background Art

[0002] The metal vacuum distillation purification technology is mainly used to separate the target metal from the metal mixture and improve the extraction efficiency of the target metal. Due to the different evaporation conditions of the light component and the heavy component under metal vacuum distillation, the extracted target metal will be purer.

[0003] There are certain drawbacks in the current metal vacuum distillation. The metal mixture placed in the traditional vacuum tank is in a static state. As the negative pressure in the vacuum tube gradually increases, the light components on the surface of the metal mixture will evaporate first, while the light components mixed in the mixture are difficult to evaporate. When it is the turn of the heavy components to evaporate, the vapor pressure inside the vacuum tube becomes low, and the evaporation efficiency of the light components will decrease, making the metal vacuum distillation and purification cumbersome, thereby reducing the efficiency of the target metal output.

[0004] In view of this, a vacuum distillation device for metal purification is designed to solve the above problems. Summary of the invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technology.

[0006] To this end, the technical solution adopted in the present invention is: A vacuum distillation device for metal purification, comprising a tank sealing mechanism, a vacuum pumping mechanism arranged on the tank sealing mechanism, a sealing cover arranged on the vacuum pumping mechanism, a material placing assembly arranged in the vacuum pumping mechanism and placed horizontally, and a chamber pressurization mechanism arranged in the vacuum pumping mechanism; the tank sealing mechanism comprises a bottom cover and a first air pipe installed in the bottom cover; the vacuum pumping mechanism comprises a pressure-resistant outer cylinder installed on the bottom cover, a cushion block installed outside the pressure-resistant outer cylinder, two vertical rails arranged on the inner wall of the pressure-resistant outer cylinder, a second air pipe installed on the pressure-resistant outer cylinder, an inner pad fixedly installed in the middle of the two vertical rails, two suspensions fixedly installed on the top of the inner pad, and a rolling disk arranged between the two suspensions; the chamber pressurization mechanism comprises a pressurization head arranged at the bottom of the inner pad; the material placing assembly is used to store metal mixtures, and cooperates with the rolling disk and the pressurization head to provide a rolling platform for the stored metal mixture; the sealing cover is arranged on the top of the pressure-resistant outer cylinder.

[0007] In a preferred example, the present invention can be further configured as follows: the chamber pressurization mechanism further includes two sliders movably mounted in the two vertical rails, and negative pressure pads mounted on top of the two sliders; The negative pressure gasket is movably installed on the outside of the two vertical rails; A first chuck is installed at the bottom end of the slider, a first pull rod is movably installed on the first chuck, a shaft is installed at the bottom end of the first pull rod, a second pull rod is movably installed on the shaft, and a second chuck is movably installed on the top end of the second pull rod; The number of the second clamps is two.

[0008] In a preferred example, the present invention can be further configured as follows: the material placing assembly includes a drawer plate movably mounted in the cushion block; Both sides of the drawer board are provided with slideways, and a slider and a compression spring are arranged in the slideways, one end of the compression spring is fixed to the inner wall of the slideway, and the other end of the compression spring is fixed to the slider; A cantilever is movably mounted on the sliding block, and a collecting tray is movably mounted on the other end of the cantilever.

[0009] In a preferred example, the present invention can be further configured as follows: a groove is formed on the top of the collecting tray, and evenly distributed notches are formed on the bottom of the collecting tray; The end of the drawer plate that penetrates through the inner cavity of the pressure-resistant outer cylinder is provided with an end plate adapted to bear pressure on the collecting tray.

[0010] In a preferred example, the present invention can be further configured as follows: the booster head is composed of a thickened pad and a plurality of evenly distributed columns; The inner pad is in a T-shaped structure, and through holes adapted to a plurality of columns are provided inside the inner pad, and a plurality of fan-shaped ventilation slots are provided inside the inner pad.

[0011] In a preferred example, the present invention can be further configured as follows: the tank sealing mechanism further includes a plurality of legs mounted on the bottom of the bottom cover, and a hydraulic component is mounted in the middle of the bottom cover; A horizontal load-bearing pad is installed at the top end of the hydraulic sub-rod in the hydraulic component; Rectangular notches are provided at both ends of the top of the load-bearing pad, and a first return spring and a second return spring are respectively installed at both ends of the inner wall of the rectangular notch.

[0012] In a preferred example, the present invention may be further configured as follows: the other end of the first return spring is attached to the outer wall of the second pull rod; The other end of the second return spring is attached to the outer wall of the first pull rod.

[0013] In a preferred example, the present invention can be further configured as follows: two insertion rods are installed on the top of the rolling disc, and the two insertion rods are both provided with limited position lock buckles; A third return spring is arranged outside the insertion rod; The suspension is in an L-shaped structure as a whole, and the top end of the third return spring is adapted to bear pressure on the plate at the top of the suspension.

[0014] In a preferred example, the present invention can be further configured as follows: the length of the sliding block is half the length of the vertical rail; The two notches on the negative pressure gasket are adapted to fit on the outer walls of the two vertical rails, and the negative pressure gasket is located directly below the second air pipe.

[0015] In a preferred example, the present invention can be further configured as follows: a plug hole adapted to the drawer board and the collecting tray is provided inside the cushion block, and two screw rods are provided outside the cushion block, and nuts are installed on the two screw rods for locking the drawer board.

[0016] By adopting the above technical solution, the beneficial effects achieved by the present invention are: 1. The present invention provides a bottom cover, a pressure-resistant outer cylinder and a top cover of an assembled structure. When the tank body formed by the three components is separated into two vacuum environments by a negative pressure gasket, the metal mixture can freely switch between low vapor pressure and high vapor pressure, while improving the efficient evaporation separation of light component substances and heavy component substances under different vapor pressures.

[0017] 2. The present invention arranges a collecting plate for storing the metal mixture inside the pressure-resistant outer cylinder. As the booster head pushes the collecting plate toward the rolling plate, the metal mixture accumulated on the collecting plate can expand the distillation area under the rolling state, thereby improving the evaporation efficiency of each component substance under different vapor pressure conditions.

[0018] 3. The present invention movably installs two cantilevers in the transverse grooves on both sides of the collecting tray. At this time, the other ends of the two cantilevers are movably installed in the slideways on both sides of the drawer plate through sliders. The collecting tray pushed by the booster head can provide a crushing force to the metal mixture while ensuring that the collecting tray is always placed horizontally, thereby facilitating the rapid withdrawal of the target product. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the present invention when vacuuming; Figure 2 It is a cross-sectional schematic diagram of the present invention; Figure 3 It is a dispersion schematic diagram of the present invention; Figure 4 It is a schematic diagram of the tank sealing mechanism of the present invention; Figure 5 It is a schematic diagram of the vacuum pumping mechanism of the present invention; Figure 6 It is a schematic diagram of the material placing assembly of the present invention; Figure 7It is a schematic diagram of the vacuum pumping mechanism and the pressurizing mechanism in the chamber of the present invention; Figure 8 For the present invention Figure 7 A magnified schematic diagram of center A.

[0020] Reference numerals: 100, tank sealing mechanism; 110, bottom cover; 120, support leg; 130, first air pipe; 140, hydraulic component; 150, load-bearing pad; 160, first return spring; 170, second return spring; 200, vacuum pumping mechanism; 210, pressure-resistant outer cylinder; 220, second air pipe; 230, vertical rail; 240, cushion block; 250, inner cushion; 260, suspension; 270, rolling plate; 280, third return spring; 290, lock buckle; 300, pressurizing mechanism in chamber; 310, slider; 320, negative pressure gasket; 330, first chuck; 340, first tie rod; 350, shaft; 360, second tie rod; 370, second chuck; 380, pressurizing head; 400, material placement assembly; 410, drawer board; 420, slider; 430, compression spring; 440, cantilever; 450, material collection tray; 500. Sealing cover. DETAILED DESCRIPTION

[0021] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementations and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0022] It is to be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0023] A vacuum distillation apparatus for metal purification provided by some embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0024] Embodiment 1: Combination Figure 1-Figure 8As shown, a vacuum distillation device for metal purification provided by the present invention includes a tank sealing mechanism 100, a vacuum pumping mechanism 200 arranged on the tank sealing mechanism 100, a sealing cover 500 arranged on the vacuum pumping mechanism 200, a material placing assembly 400 arranged in the vacuum pumping mechanism 200 and placed horizontally, and a chamber pressurization mechanism 300 arranged in the vacuum pumping mechanism 200, the tank sealing mechanism 100 is used to provide a support platform for the extension of the chamber pressurization mechanism 300, the vacuum pumping mechanism 200 is used to provide a vacuum environment for the metal mixture, the chamber pressurization mechanism 300 is used to grind the metal mixture, the material placing assembly 400 is used to store the metal mixture, and cooperates with the grinding plate 270 and the booster head 380 to provide a grinding platform for the stored metal mixture, and the sealing cover 500 is used to provide sealing for the vacuum tank.

[0025] The tank sealing mechanism 100 includes a bottom cover 110, a first air pipe 130 installed in the bottom cover 110, a plurality of legs 120 installed at the bottom of the bottom cover 110, and a hydraulic component 140 installed in the middle of the bottom cover 110; A horizontal load-bearing pad 150 is installed at the top of the hydraulic sub-rod in the hydraulic component 140; Rectangular notches are provided at both ends of the top of the load-bearing pad 150, and a first return spring 160 and a second return spring 170 are respectively installed at both ends of the inner wall of the rectangular notch; The vacuum mechanism 200 includes a pressure-resistant outer cylinder 210 mounted on the bottom cover 110, a cushion block 240 mounted on the outside of the pressure-resistant outer cylinder 210, two vertical rails 230 arranged on the inner wall of the pressure-resistant outer cylinder 210, a second air pipe 220 mounted on the pressure-resistant outer cylinder 210, an inner pad 250 fixedly mounted in the middle of the two vertical rails 230, two suspensions 260 fixedly mounted on the top of the inner pad 250, and a rolling plate 270 arranged between the two suspensions 260; The chamber pressurization mechanism 300 includes a pressurization head 380 disposed at the bottom of the inner pad 250; The material placing assembly 400 includes a drawer plate 410 movably mounted in the cushion block 240; Slideways are provided on both sides of the drawer board 410, and a slider 420 and a compression spring 430 are provided in the slideways, and one end of the compression spring 430 is fixed to the inner wall of the slideway, and the other end of the compression spring 430 is fixed to the slider 420; A cantilever 440 is movably mounted on the slider 420, and a collecting tray 450 is movably mounted on the other end of the cantilever 440; The top of the collecting tray 450 is provided with a groove, and the bottom of the collecting tray 450 is provided with evenly distributed notches; The end of the drawer plate 410 that penetrates into the inner cavity of the pressure-resistant outer cylinder 210 is provided with an end plate adapted to bear pressure on the collecting tray 450; The sealing cover 500 is disposed on the top of the pressure-resistant outer cylinder 210 .

[0026] Traditional vacuum distillation of metal mixtures requires a lot of experiments and manual adjustment of parameters before the target product can be prepared. However, this frequent parameter adjustment process consumes man-hours and the operation steps are complicated. It is difficult to control the efficiency of the distillation of the target product under low vapor pressure and high vapor pressure conditions. Since the metal mixture is stationary under a vacuum environment, the light components on the surface of the mixture will evaporate first under high vapor pressure, but the light components accumulated inside the material are difficult to evaporate in time. As the vapor pressure changes, light components will accumulate during the evaporation of the heavy components.

[0027] The device is provided with a bottom cover 110, a pressure-resistant outer cylinder 210 and a sealing cover 500 of an assembled structure, and two symmetrically distributed vertical rails 230 are installed on the inner wall of the pressure-resistant outer cylinder 210, and the two vertical rails 230 and the negative pressure gasket 320 are used to separate the inner cavity of the tank body. When the collecting plate 450 transfers the stored metal mixture to the top of the inner gasket 250, the negative pressure gasket 320, the pressure-resistant outer cylinder 210 and the materials in the vacuum state of the bottom cover 110 cavity can be freely transformed under low vapor pressure and high vapor pressure states, thereby improving the selection of the independent tank body for different vapor pressures. When the collecting plate 450 is pushed upward by the booster head 380 until the material on the collecting plate 450 is pushed toward the crushing plate 270, the material can eventually be crushed by the crushing plate 270 and the collecting plate 450 to the maximum contact area. At this time, the selectively changed vapor pressure environment can efficiently evaporate and separate the metal mixture with an increased surface area.

[0028] Embodiment 2: Combination Figure 3-Figure 8 As shown, based on the embodiment 1, the chamber pressurization mechanism 300 further includes two sliders 310 movably mounted in the two vertical rails 230 and a negative pressure gasket 320 mounted on the top of the two sliders 310; The negative pressure gasket 320 is movably mounted on the outside of the two vertical rails 230; A first clamp 330 is installed at the bottom end of the slider 310, a first pull rod 340 is movably installed on the first clamp 330, a shaft 350 is installed at the bottom end of the first pull rod 340, a second pull rod 360 is movably installed on the shaft 350, and a second clamp 370 is movably installed at the top end of the second pull rod 360; The number of the second clamps 370 is two; The other end of the first return spring 160 is attached to the outer wall of the second pull rod 360; The other end of the second return spring 170 is attached to the outer wall of the first pull rod 340 .

[0029] Preferably, when the hydraulic component 140 is in operation, its internal hydraulic sub-rod will push the load-bearing pad 150 to rise and fall smoothly. At this time, the joint portion of the first tie rod 340, the shaft rod 350 and the second tie rod 360 will be pressurized by the rectangular groove in the load-bearing pad 150. As the load-bearing pad 150 adjusts the distance between the two groups of first tie rods 340, the shaft rod 350 and the second tie rod 360, the initial positions of the booster head 380 and the negative pressure gasket 320 can finally be calibrated and adjusted.

[0030] Embodiment 3: Combination Figure 5-Figure 8 As shown, based on Example 1, the booster head 380 is composed of a thickened pad and a plurality of evenly distributed columns; The inner pad 250 is in a T-shaped structure, and a through hole adapted to fit a plurality of pillars is provided inside the inner pad 250, and a plurality of fan-shaped ventilation slots are provided inside the inner pad 250; Two insertion rods are installed on the top of the rolling plate 270, and the two insertion rods are provided with limited position lock buckles 290; A third return spring 280 is disposed outside the insertion rod; The suspension 260 is in an L-shaped structure as a whole, and the top end of the third return spring 280 is adapted to bear pressure on the plate at the top of the suspension 260 .

[0031] Preferably, the inner pad 250 is fixedly installed in the middle of the two vertical rails 230. As the negative pressure gasket 320 descends under the vacuum state, the two sliders 310 installed on the negative pressure gasket 320 will push the two groups of first pull rods 340, the shaft rod 350 and the second pull rod 360 to stretch relative to each other. Finally, the booster head 380 as a whole can apply thrust to the placed collecting plate 450 along the through hole inside the inner pad 250. Finally, the collecting plate 450 clamped by the inner column of the booster head 380 can move the metal mixture closer to the rolling plate 270 until it is rolled to expand the distillation area, thereby improving the rapid distillation separation of light components and heavy components.

[0032] Embodiment 4: Combination Figure 4 , Figure 7 and Figure 8 As shown, based on the embodiment 1, the length of the slider 310 is half of the length of the vertical rail 230; The two notches formed on the negative pressure gasket 320 are adapted to fit on the outer walls of the two vertical rails 230 , and the negative pressure gasket 320 is located directly below the second air pipe 220 .

[0033] Preferably, after the negative pressure gasket 320 is movably installed on the outside of the two vertical rails 230, it will separate the cavity formed by the pressure-resistant outer cylinder 210 and the sealing cover 500. At this time, the second air pipe 220 will be connected to the cavity between the negative pressure gasket 320 and the sealing cover 500, and the first air pipe 130 will be connected to the cavity between the negative pressure gasket 320, the pressure-resistant outer cylinder 210 and the bottom cover 110. At this time, the tank body formed by the bottom cover 110, the pressure-resistant outer cylinder 210 and the sealing cover 500 can freely switch between different vapor pressure states. With the distillation at different temperatures, the light components and heavy components in the metal mixture can be effectively evaporated and separated.

[0034] Embodiment 5: Combination Figure 5 and Figure 6 As shown, in the above embodiment, a plug hole adapted to the drawer board 410 and the collecting tray 450 is provided inside the cushion block 240 , and two screw rods are provided outside the cushion block 240 , and nuts are installed on the two screw rods for locking the drawer board 410 .

[0035] Preferably, the main body of the pad 240 is fixedly mounted on the outer wall of the pressure-resistant outer cylinder 210. When the collecting tray 450 and the drawer board 410 are aligned, the metal mixture stored in the groove at the top of the collecting tray 450 can be effectively stored. At this time, the pad 240 can provide a sufficiently stable supporting force for the horizontally placed drawer board 410. At the same time, after the drawer board 410 is stable, the collecting tray 450 can rise steadily under pressure to avoid shaking when the stored metal mixture is squeezed.

[0036] The working principle and use process of the present invention: Metal vacuum distillation is based on the difference in vapor pressure of different substances at different pressures and temperatures. When the metal is in a vacuum state, the boiling point of the metal will decrease accordingly, so that at a relatively low temperature, the metal and other impurity components can begin to evaporate. At the same time, the metal and impurities can be separated by combining the different rates at which the vapor pressure of different metals changes with temperature; Loosen the nuts on the two threaded sections at the outer end of the cushion block 240 in advance, then pull out the drawer plate 410, and then the aligned collecting tray 450 and the cantilever 440 can be pulled out from the cushion block 240, and then place the metal raw material in the groove at the top of the collecting tray 450, and then reinstall the collecting tray 450 and the drawer plate 410 until the bottom end of the collecting tray 450 moves to the top end of the inner cushion 250, and at this time, the notch at the bottom of the cushion block 240 is symmetrical with the through hole inside the inner cushion 250, and the booster head 380 is not engaged with the notch at the bottom of the cushion block 240 in the initial state; When the first air pipe 130 and the second air pipe 220 are connected to the external vacuum pipe respectively, as the first air pipe 130 is vacuumed outward, the cavity formed by the negative pressure gasket 320, the pressure-resistant outer cylinder 210 and the bottom cover 110 can continuously form a vacuum environment, and as the metal raw material on the top of the collecting tray 450 is vacuum distilled, as the pressure selectively increases or decreases, the light component substances with high vapor pressure can be evaporated at low temperature and in a vacuum state, and as the temperature rises, the heavy component substances with low vapor pressure will be slowly evaporated; As the light component substances on the surface of the metal raw material evaporate, the negative pressure gasket 320 that is continuously pressed and descends will drive the two sliders 310 to descend, and the two first pull rods 340 movably mounted on the two first clamps 330 will push the two second pull rods 360 upward in the same direction. At this time, the columns in the booster head 380 will rise along the holes inside the inner pad 250, and finally the multiple columns evenly distributed will be clamped in the grooves at the bottom of the pad 240, thereby pushing the collecting plate 450 to rise toward the rolling plate 270. At this time, the metal raw material placed on the top of the collecting plate 450 can be crushed by the rolling plate 270, and the raw materials inside the metal can be exposed, thereby improving the rapid evaporation of the light component substances. After the heavy components are crushed and diffused, the metal raw materials increase the contact area of ​​distillation and can be smoothly evaporated under the action of gradually increasing temperature; Therefore, the device can selectively convert between low steam pressure and high steam pressure processes, while improving the efficient evaporation and separation of light components and heavy components in the metal raw materials.

[0037] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A vacuum distillation device for metal purification, comprising a tank sealing mechanism (100), characterized in that: It also includes a vacuum pumping mechanism (200) arranged on the tank body sealing mechanism (100), a sealing cover (500) arranged on the vacuum pumping mechanism (200), a material placing assembly (400) arranged in the vacuum pumping mechanism (200) and placed horizontally, and a chamber pressurization mechanism (300) arranged in the vacuum pumping mechanism (200); The tank sealing mechanism (100) comprises a bottom cover (110) and a first air pipe (130) installed in the bottom cover (110); The vacuum extraction mechanism (200) comprises a pressure-resistant outer cylinder (210) mounted on the bottom cover (110), a cushion block (240) mounted outside the pressure-resistant outer cylinder (210), two vertical rails (230) arranged on the inner wall of the pressure-resistant outer cylinder (210), a second air pipe (220) mounted on the pressure-resistant outer cylinder (210), an inner pad (250) fixedly mounted in the middle of the two vertical rails (230), two suspensions (260) fixedly mounted on the top of the inner pad (250), and a rolling plate (270) arranged between the two suspensions (260); The chamber pressure boosting mechanism (300) comprises a pressure boosting head (380) arranged at the bottom of the inner pad (250); The material placement assembly (400) is used to store the metal mixture, and cooperates with the rolling plate (270) and the pressure boosting head (380) to provide a rolling platform for the stored metal mixture; The sealing cover (500) is arranged on the top of the pressure-resistant outer cylinder (210).

2. A vacuum distillation apparatus for metal purification according to claim 1, characterized in that: The chamber pressure-boosting mechanism (300) further comprises two sliders (310) movably mounted in the two vertical rails (230), and a negative pressure gasket (320) mounted on top of the two sliders (310); The negative pressure gasket (320) is movably mounted outside the two vertical rails (230); A first chuck (330) is mounted at the bottom end of the slider (310), a first pull rod (340) is movably mounted on the first chuck (330), a shaft (350) is mounted at the bottom end of the first pull rod (340), a second pull rod (360) is movably mounted on the shaft (350), and a second chuck (370) is movably mounted on the top end of the second pull rod (360); The number of the second clamps (370) is two.

3. A vacuum distillation apparatus for metal purification according to claim 1, characterized in that: The material placement assembly (400) comprises a drawer plate (410) movably mounted in a cushion block (240); Slideways are provided on both sides of the drawer board (410), and a slider (420) and a compression spring (430) are provided in the slideways, one end of the compression spring (430) is fixed to the inner wall of the slideway, and the other end of the compression spring (430) is fixed to the slider (420); A cantilever (440) is movably mounted on the slider (420), and a material collecting tray (450) is movably mounted on the other end of the cantilever (440).

4. A vacuum distillation apparatus for metal purification according to claim 3, characterized in that: The top of the collecting tray (450) is provided with a groove, and the bottom of the collecting tray (450) is provided with evenly distributed notches; The end of the drawer plate (410) that penetrates into the inner cavity of the pressure-resistant outer cylinder (210) is provided with an end plate adapted to bear pressure on the collecting tray (450).

5. A vacuum distillation apparatus for metal purification according to claim 1, characterized in that: The boost head (380) is composed of a thickened cushion block and a plurality of evenly distributed columns; The inner pad (250) is in a T-shaped structure, and through holes adapted to fit a plurality of upright posts are provided inside the inner pad (250), while a plurality of fan-shaped ventilation slots are provided inside the inner pad (250).

6. A vacuum distillation apparatus for metal purification according to claim 1, characterized in that: The tank sealing mechanism (100) further comprises a plurality of legs (120) mounted on the bottom of the bottom cover (110); a hydraulic component (140) is mounted in the middle of the bottom cover (110); A transverse load-bearing pad (150) is installed at the top end of the hydraulic sub-rod in the hydraulic component (140); Rectangular notches are provided at both ends of the top of the load-bearing pad (150), and a first return spring (160) and a second return spring (170) are respectively installed at both ends of the inner wall of the rectangular notch.

7. A vacuum distillation apparatus for metal purification according to claim 6, characterized in that: The other end of the first return spring (160) is attached to the outer wall of the second pull rod (360); The other end of the second return spring (170) is attached to the outer wall of the first pull rod (340).

8. A vacuum distillation apparatus for metal purification according to claim 1, characterized in that: Two insertion rods are installed on the top of the rolling plate (270), and the two insertion rods are both provided with limited position lock buckles (290); A third return spring (280) is arranged outside the insertion rod; The suspension (260) is an L-shaped structure as a whole, and the top end of the third return spring (280) is adapted to bear pressure on a plate at the top of the suspension (260).

9. A vacuum distillation apparatus for metal purification according to claim 2, characterized in that: The length of the sliding block (310) is half the length of the vertical rail (230); The two notches formed on the negative pressure gasket (320) are adapted to fit on the outer walls of the two vertical rails (230), and the negative pressure gasket (320) is located directly below the second air pipe (220).

10. A vacuum distillation apparatus for metal purification according to claim 1, characterized in that: The cushion block (240) is provided with a socket adapted to fit the drawer plate (410) and the collecting tray (450) inside, and two screw rods are arranged outside the cushion block (240), and nuts are mounted on the two screw rods for locking the drawer plate (410).

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