A vacuum purification and insulation furnace for molten aluminum

Abstract

The present invention relates to the field of insulation furnaces, and in particular to a vacuum purification insulation furnace for molten aluminum. The interior of the furnace body is equipped with a purification cabin by a driving unit, and the interior of the purification cabin is provided with a plurality of driving motors 1, which respectively drive the centrifugal unit and the rotating feed block to rotate. In the present invention, the purification cabin is driven to rotate by the driving unit to purify the upper layer of the aluminum liquid. A separation unit is provided in the purification cabin to separate the aluminum liquid into gas and liquid. The gas enters the gas cabin under the action of high-speed centrifugation for collection, and the aluminum liquid is accumulated in the purification cabin after degassing. After the aluminum liquid accumulates to a certain capacity, the movable frame is quickly moved and reset by the gear shaft and the gear plate mechanism to achieve the function of quickly opening and closing the liquid separation port, realize the gas-liquid independent collection function of the aluminum liquid, reduce the generation of aluminum liquid oxide slag, reduce the gas residue inside the aluminum liquid, and improve the overall quality of the aluminum liquid.

Description

Technical Field

[0001] The invention relates to the technical field of holding furnaces, and in particular to a vacuum purification holding furnace for molten aluminum. Background Art

[0002] A vacuum insulation furnace is a device that extracts air from the furnace to create a near-vacuum environment, allowing it to heat, insulate, or process materials under low or high temperature conditions. The core of the device is to use the vacuum environment to reduce heat conduction, convection, and radiation, thereby improving insulation effects and avoiding material contamination.

[0003] In the prior art, during the aluminum refining process, the molten aluminum is fed into a vacuum holding furnace. During smelting and production, it is prone to gas absorption and slag inclusion. A large amount of slag inclusion, gas, and other metal and non-metallic impurities in the molten aluminum enter the holding furnace along with the molten aluminum. A large amount of impurities are easily deposited on the bottom of the furnace or adhere to the furnace wall, contaminating the holding furnace, increasing the number of furnace cleanings, and increasing the difficulty of purifying the molten aluminum.

[0004] Existing technologies mostly inject inert gas and use its adsorption principle to discharge and extract inclusions and hydrogen. However, the traditional furnace body can only complete the operation of extracting the gas separately, and the subsequent slag removal still needs to be carried out by a slag discharge vehicle, which is a cumbersome operation. At the same time, during the gas collection process, small bubbles that have not been discharged will still exist in the aluminum liquid, affecting the overall quality of the aluminum liquid. Traditional devices cannot effectively collect them, and the overall quality of the aluminum liquid cannot be guaranteed. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a vacuum purification and holding furnace for molten aluminum.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A vacuum purification and holding furnace for aluminum melt, comprising a furnace body, wherein a purification cabin is provided inside the furnace body by a driving unit, wherein a plurality of driving motors are provided inside the purification cabin, and the driving motors respectively drive a separation unit and a rotating feed block to rotate;

[0008] A fixed feed barrel is provided in the middle of the purification chamber, and a rotating feed block is rotatably installed on the outer wall of the fixed feed barrel. The rotating feed block rotates to pour the molten aluminum into the interior of the fixed feed barrel, and the fixed feed barrel introduces the molten aluminum into the composite hollow drive shaft. The exterior of the composite hollow drive shaft is equipped with multiple groups of separation blocks to form a separation unit, and the interior of each separation block is installed with a high-temperature breathable brick through a movable frame, and the top of the high-temperature breathable brick is in compression contact with the tightening spring;

[0009] Gear plates are provided on both sides of the movable frame, and the gear plates are limitedly assembled in the mounting grooves opened on the inner wall of the separation block. A gear shaft is tiltedly arranged in the mounting groove through the deflection frame, and the gear shaft and the gear plate form a mutually meshing connection mechanism. When the movable frame moves through the gear shaft, the movable frame is separated from the liquid separation port opened on the inner wall of the separation block, and the outside of the liquid separation port is connected to the material separation frame;

[0010] One side of the separation block is connected to the gas cabin through a rotating sealing cover, the rotating sealing cover is rotatably assembled on one side of the gas cabin, and the top of the gas cabin is connected to chamber 1 set on the top of the purification cabin, and one side of chamber 1 is provided with vacuum tube 2.

[0011] In addition, a preferred structure is that the drive unit includes a hydraulic cylinder assembly and a second drive motor. The hydraulic cylinder assembly is assembled on a cover provided on the upper part of the furnace body, and an integrated rod is connected to the telescopic end. The middle part of the integrated rod is provided with the second drive motor. The output end of the second drive motor is connected to the upper wall of the purification cabin.

[0012] A fixed cabin is provided at the bottom of the integrated rod, and the fixed cabin is docked with a docking seat provided at the top of the purification cabin to form a chamber one, and the bottom of the chamber one is communicated with the gas cabin.

[0013] In addition, the preferred structure is that a cover is provided on the upper part of the furnace body, and vacuum tube 1 and vacuum tube 2 are arranged on the cover body. Vacuum tube 1 is used to evacuate the inside of the furnace body, and one end of vacuum tube 2 is connected to the inside of the fixed cabin.

[0014] In addition, a preferred structure is that a feed port 1 is provided on the outside of the purification cabin, and a stacking trough is provided inside the feed port 1 to assemble a metal filter.

[0015] In addition, a preferred structure is that a fixed feed barrel is fixedly installed on one side of the interior of the purification chamber, a rotating feed block is rotatably installed on the upper part of the fixed feed barrel, a collecting port is opened on one side of the rotating feed block for introducing molten aluminum, and a discharge port is opened on the side of the rotating feed block facing the fixed feed barrel for discharging the molten aluminum;

[0016] A second feed port is provided on the upper portion of the fixed feed barrel, which is communicated with the interior of the barrel. An inclined flow channel is provided inside the fixed feed barrel, which is inclined toward one side of the composite hollow drive shaft.

[0017] In addition, a preferred structure is that one end of the composite hollow drive shaft is drivingly connected to a drive motor, and the other end extends into a separation cabin provided inside the purification cabin and is connected to the input end of a planetary gear set, and the output end of the planetary gear set is connected to a rotating feed block;

[0018] The planetary gear set includes a driving gear, an internal gear ring, planetary gears, a planetary disk, and a connecting frame. The driving gear is installed at one end of the composite hollow driving shaft. An internal gear ring is fixedly arranged on the outer side away from the driving gear. A plurality of planetary gears are meshed and installed between the internal gear ring and the driving gear. One side of each planetary gear is assembled on the planetary disk. One end of the planetary disk is connected to the rotary feeding block through a plurality of connecting frames.

[0019] In addition, preferably, a plurality of air jet nozzles are provided at the inner bottom end of the furnace body.

[0020] In addition, preferably, one end of the deflecting frame is rotatably installed on the inner wall of the installation groove, and a tooth shaft is rotatably provided in the middle of the deflecting frame. The tooth shaft is fitted and clamped in the upper groove of the moving frame in the natural state. A coil spring is provided at the rotational connection between the tooth shaft and the deflecting frame.

[0021] In addition, preferably, the moving frame is installed in the separation block in a limited sliding manner, and in the natural state, the moving frame covers the outside of the liquid separation port;

[0022] One side of the liquid separation port is communicated with the material distribution frame. The material distribution frame is in a "冂" shape, and a grid discharge port is provided at the top of the material distribution frame. The grid discharge port is limitedly assembled in the annular liquid collection groove opened on the inner wall of the separation chamber. A liquid discharge port is opened at the bottom of the annular liquid collection groove to communicate with the outside.

[0023] In addition, preferably, a bent reset strip is provided on one side of the bottom of the deflecting frame. The other end of the bent reset strip is connected to the inside of the separation block. When the deflecting frame is deflected by force, the bent reset strip is deformed.

[0024] The beneficial effects of the present invention are as follows:

[0025] In the present invention, the purification chamber is rotated by the driving unit to purify the upper layer of the molten aluminum. A separation unit is provided in the purification chamber to perform gas-liquid separation on the molten aluminum. The gas enters the gas chamber for collection under the action of high-speed centrifugation. The molten aluminum accumulates in the purification chamber after degassing treatment. After the molten aluminum accumulates to a certain capacity, the moving frame quickly moves and resets through the tooth shaft and tooth plate mechanism to achieve the function of quickly opening and closing the liquid separation port, realizing the gas-liquid independent collection function of the molten aluminum, reducing the generation of oxidation slag in the molten aluminum, reducing the residual gas inside the molten aluminum, and improving the overall quality of the molten aluminum. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic internal structure diagram of a vacuum purification and heat preservation furnace for molten aluminum proposed by the present invention;

[0027] Figure 2 It is a schematic external structure diagram of a vacuum purification and heat preservation furnace for molten aluminum proposed by the present invention; <​ Figure 3 This is a schematic diagram of the external structure of the purification cabin proposed by the present invention;

[0029] Figure 4 This is a schematic diagram of the internal structure of the purification cabin proposed by the present invention;

[0030] Figure 5 This is a schematic diagram of the explosion of the internal structure of the purification cabin proposed by the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of the rotating feed block and separation unit proposed in the present invention;

[0032] Figure 7 This is an exploded schematic diagram of the rotary feed block connection structure proposed in the present invention;

[0033] Figure 8 This is a cross-sectional view of the connection structure of the fixed feed cylinder and the composite hollow drive shaft proposed in the present invention;

[0034] Figure 9 This is a schematic diagram of the internal structure of the rotary feed block proposed in the present invention;

[0035] Figure 10 This is a schematic diagram of the internal structure of the separation cabin proposed by the present invention;

[0036] Figure 11 This is a schematic diagram of the gas cabin connection structure proposed by the present invention;

[0037] Figure 12 This is a schematic diagram of the installation structure of the separation block proposed in the present invention;

[0038] Figure 13 A cross-sectional view of the internal structure of the separation block proposed by the present invention;

[0039] Figure 14 This is a schematic diagram of the tooth plate installation structure proposed by the present invention;

[0040] Figure 15 This is a schematic diagram of the installation structure of the ceramic filter plate proposed in the present invention;

[0041] Figure 16 This is a schematic diagram of the gas cabin connection structure proposed by the present invention;

[0042] Figure 17 This is a schematic diagram of the internal structure of the installation slot proposed by the present invention;

[0043] Figure 18 This is a schematic diagram of the deflection frame installation structure proposed in the present invention.

[0044] In the figure: 1. furnace body; 2. feed channel; 201. discharge channel; 3. cover; 4. hydraulic cylinder assembly; 41. integrated rod; 42. drive motor 1; 43. drive motor 2; 5. vacuum tube 1; 51. vacuum tube 2; 6. jet nozzle; 7. purification chamber; 71. docking station; 72. chamber 1; 73. isolation cylinder; 8. feed port 1; 9. fixed chamber; 10. separation chamber; 11. rotating feed block; 111. collection port; 112. discharge port; 113. ceramic filter plate; 12. gas chamber; 121. rotating sealing cover; 1211. air inlet groove; 13. separation unit; 131. separation block; 132. filter element; 133. High-temperature breathable bricks; 134, material distribution rack; 1341, grille discharge port; 135, liquid distribution port; 136, mobile rack; 14, composite hollow drive shaft; 141, drainage trough; 15, planetary gear set; 151, drive gear; 152, inner gear ring; 153, planetary gear; 154, planetary disk; 155, connecting rack; 16, fixed feed barrel; 161, feed port 2; 17, liquid discharge port; 18, annular liquid collecting trough; 19, discharge flow channel; 20, accumulation trough; 21, metal filter; 22, deflection rack; 23, gear shaft; 24, bending reset strip; 25, coil spring; 26, tensioning spring; 27, tooth plate; 28, mounting slot. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0046] Reference Figure 1-3 、 Figure 15 A vacuum purification and holding furnace for molten aluminum comprises a furnace body 1, a feeding channel 2 is provided on one side of the outside of the furnace body 1, the feeding channel 2 is connected to a discharge channel 19 provided inside the furnace body 1, and the molten aluminum is discharged into the interior of the furnace body 1 through the discharge channel 19;

[0047] A discharge channel 201 is provided at the bottom of the furnace body 1 . The discharge channel 201 is communicated with the interior of the furnace body 1 , and the aluminum liquid inside the furnace body 1 can be discharged through the discharge channel 201 .

[0048] A cover 3 is provided on the top of the furnace body 1 , and a vacuum tube 5 is arranged on the cover 3 . The vacuum tube 5 is connected to an external vacuum pump assembly, and the interior of the furnace body 1 is vacuumed through the vacuum tube 5 .

[0049] Furthermore, a purification cabin 7 is provided in the middle of the furnace body 1, and an integrated rod 41 is installed on the top of the purification cabin 7. The integrated rod 41 is connected to the telescopic end of the hydraulic cylinder assembly 4, and the hydraulic cylinder assembly 4 drives the integrated rod 41 to extend to realize the vertical movement of the purification cabin 7.

[0050] A second drive motor 43 is disposed in the middle of the integrated rod 41 , and an output end of the second drive motor 43 is connected to the top of the purification cabin 7 , so that the purification cabin 7 is driven to rotate by the second drive motor 43 .

[0051] Feed inlets 8 are symmetrically and staggeredly provided on both sides of the bottom of the purification cabin 7 , and a stacking trough 20 is provided at the feed inlet 8 to assemble a metal filter 21 .

[0052] Furthermore, a fixed cabin 9 is provided at the bottom of the integrated rod 41 , and the fixed cabin 9 is rotatably connected to a docking seat 71 provided on the top of the purification cabin 7 , and the docking seat 71 is communicated with the interior of the fixed cabin 9 to form a chamber 1 72 .

[0053] A second vacuum tube 51 is provided on the upper portion of the fixed cabin 9 , one end of the second vacuum tube 51 extends out of the furnace body 1 and is connected to an external vacuum pump assembly.

[0054] A high-temperature corrugated sleeve is provided on the outside of the integrated rod 41 to block high temperature.

[0055] Furthermore, a plurality of nozzles 6 are provided at the bottom of the furnace body 1 , and inert gas is ejected from the nozzles 6 , wherein the inert gas can be any one of argon and nitrogen.

[0056] Reference Figure 4-9 A pair of independently operated drive motors 42 are provided in the middle of the purification cabin 7. The rotation directions of each drive motor 42 are opposite, and the output shaft of each drive motor 42 is connected to a composite hollow drive shaft 14. A separation unit 13 is assembled on the composite hollow drive shaft 14. The separation unit 13 and the composite hollow drive shaft 14 are jointly assembled inside a separation cabin 10 arranged inside the purification cabin 7, and a rotating feed block 11 is provided on the side away from the separation cabin 10. The rotating feed block 11 is rotatably mounted on the outer wall of the fixed feed barrel 16, and one end of the rotating feed block 11 is connected to the composite hollow drive shaft 14 through a planetary gear set 15.

[0057] The rotating feed block 11 is composed of two feed blocks arranged in a symmetrical mirror image on the upper and lower sides. The feed blocks are connected by a pair of mounting sleeves and are rotatably assembled to the outer wall of the fixed feed cylinder 16 through the mounting sleeves.

[0058] A collecting port 111 is provided on one side of each feed block to collect the molten aluminum. The middle of each feed block is hollow, and a ceramic filter plate 113 is installed in the middle to achieve the effect of primary filtration. A discharge port 112 is provided on the side of each feed block facing the fixed feed cylinder 16. The discharge port 112 is used to dump the molten aluminum collected in the feed block.

[0059] A plurality of through holes are provided on the wall of the purification cabin 7 below the rotating feed block 11 , and the through holes are used to discharge residual aluminum liquid.

[0060] Among them, one end of the fixed feed cylinder 16 is fixedly installed on one side of the interior of the purification cabin 7, and the other end extends into the separation cabin 10 and is sleeved with one end of the composite hollow drive shaft 14. The composite hollow drive shaft 14 rotates relative to the outer wall of the fixed feed cylinder 16 through a bearing member;

[0061] A second feed port 161 is provided at the top of the fixed feed barrel 16. The second feed port 161 is used to receive the molten aluminum poured out by the rotating feed block 11. The second feed port 161 is connected to the interior of the fixed feed barrel 16. The interior of the fixed feed barrel 16 is configured as an inclined flow channel, which is inclined toward one side of the composite hollow drive shaft 14 and guides the molten aluminum to flow toward one side of the fixed feed barrel 16.

[0062] Furthermore, a rotating sealing cover 121 is connected to one side of the separation unit 13, and the rotating sealing cover 121 is sealed and rotated and assembled on one side of the gas cabin 12. The middle of the gas cabin 12 is hollow, and the gas cabin 12 is assembled on the inner side of the separation cabin 10. The top of the gas cabin 12 is docked and connected with the docking seat 71 set in the middle of the top of the purification cabin 7.

[0063] Furthermore, the planetary gear set 15 is integrally assembled on one side of the interior of the separation cabin 10 , and the installation chamber of the planetary gear set 15 is separated from the installation chamber of the separation unit 13 ;

[0064] The planetary gear set 15 includes a driving gear 151, an inner gear ring 152, planetary gears 153, a planetary disk 154, and a connecting frame 155. The driving gear 151 is assembled on one end of the composite hollow driving shaft 14, and the inner gear ring 152 is fixedly installed on the outer side away from the driving gear 151 through a fixing ring. Multiple sets of planetary gears 153 are meshed and assembled between the inner gear ring 152 and the driving gear 151. One side of the middle part of each planetary gear 153 is connected to the planetary disk 154. One end of the planetary disk 154 is connected to a mounting sleeve on one side of the rotating feed block 11 through the connecting frame 155. One end of the mounting sleeve extends into the interior of the separation cabin 10 and is rotated by a bearing.

[0065] When the composite hollow drive shaft 14 drives the drive gear 151 to rotate, the multiple planetary gears 153 rotate in conjunction, and the feed block 11 rotates synchronously through the planetary disk 154, and the fixed feed barrel 16 installed in the middle of the rotating feed block 11 remains stationary.

[0066] Reference Figure 5 、 Figure 10-11 、 Figure 16 The separation unit 13 includes a separation block 131, a filter element 132, a high-temperature breathable brick 133, a material distribution rack 134, a liquid separation port 135, and a movable rack 136, wherein the separation block 131 is assembled on the outer wall of the composite hollow drive shaft 14 and is connected to a plurality of drainage grooves 141 opened in the middle of the composite hollow drive shaft 14.

[0067] One end of each separation block 131 is rotatably connected to the rotary sealing cover 121 . A plurality of air inlet grooves 1211 are provided in the middle of the rotary sealing cover 121 . One side of the air inlet grooves 1211 is communicated with the interior of the separation block 131 .

[0068] The gas capsule 12 is fixedly mounted on one side of the interior of the separation capsule 10 , and a composite hollow drive shaft 14 is mounted inside the capsule through a bearing.

[0069] Furthermore, a notch is provided on the top of the gas cabin 12, and the notch extends upward to a chamber 72 provided inside the fixed cabin 9, and the gas cabin 12 is communicated with the chamber 72.

[0070] Among them, the fixed cabin 9 is rotatably sealed and docked with the docking seat 71 on the top of the purification cabin 7. An isolation cylinder 73 is provided in the middle of the docking seat 71, and the middle of the isolation cylinder 73 is equipped with a drive shaft of the drive motor 2 43.

[0071] The isolation tube 73 ensures the sealing of chamber 1 72 and isolates the drive shaft from chamber 1 72 .

[0072] Reference Figure 10 、 Figure 12-14 、 Figure 17-18 The separation block 131 rotates synchronously with the composite hollow drive shaft 14. The middle part of the separation block 131 is hollow. A filter member 132 is provided in the middle part of the separation block 131. A high-temperature breathable brick 133 is installed above the filter member 132 through a movable frame 136. A gap is left between the high-temperature breathable brick 133 and the top wall of the separation block 131 to form an air cavity. One side of the air cavity is connected to the air inlet groove 1211 opened on the rotating sealing cover 121, so that the gas cabin 12 is connected to the inside of the separation block 131.

[0073] Furthermore, liquid separation ports 135 are provided on both sides of the middle portion of the separation block 131. The liquid separation ports 135 are closed in their natural state by a movable frame 136. The movable frame 136 is slidably mounted within the separation block 131, and tooth plates 27 are provided at both ends of the movable frame 136. The tooth plates 27 are mounted in mounting grooves 28 provided on the inner wall of the separation block 131. A deflection frame 22 is rotatably mounted in the mounting groove 28 via a pin. The deflection frame 22 is tilted downward in its natural state, and the bottom side of the deflection frame 22 is connected to the inner wall of the separation block 131 via a bent reset strip 24.

[0074] A gear shaft 23 is rotatably mounted in the middle of the deflection frame 22, and one side of the gear shaft 23 is meshed with a gear plate 27 to form a connection mechanism;

[0075] The top of the tooth plate 27 is rounded and has no tooth grooves. In a natural state, the gear shaft 23 fits and engages in a groove formed by the connection between the tooth plate 27 and the movable frame 136 .

[0076] Among them, a torsion spring 25 is provided at the rotational connection between the gear shaft 23 and the deflection frame 22. The torsion spring 25 generates a torsional force opposite to the rotation direction after the gear shaft 23 rotates.

[0077] Furthermore, a top spring 26 is installed at the inner top of the separation block 131, and the bottom end of the top spring 26 is in pressing contact with the high-temperature permeable brick 133.

[0078] Furthermore, the inside of the material distribution frame 134 is hollow and integrally shaped like a "冂" character. The bottom of the material distribution frame 134 is connected and communicated with the liquid separation port 135, and a grid discharge port 1341 is provided at the top. The grid discharge port 1341 is assembled and limited in the annular liquid collection groove 18 opened inside the separation chamber 10, and a drain port 17 is penetrated and opened at the bottom of the annular liquid collection groove 18.

[0079] In this embodiment, the molten aluminum enters the bottom of the furnace body 1 through the feed channel 2 and the discharge flow channel 19. After the feeding is completed, the feed channel 2 is closed and the inside of the furnace body 1 is evacuated by the external vacuum pump assembly and the first vacuum tube 5 to create a low-pressure environment, thereby avoiding the melting reaction of the molten aluminum with the gas in the furnace and avoiding the generation of oxidation slag inclusions in the molten aluminum.

[0080] Then, the hydraulic cylinder assembly 4 drives the integrated rod 41 to extend and descend, so that the purification chamber 7 is immersed in the upper layer of the molten aluminum. Synchronously, the drive motor two 43 arranged inside the integrated rod 41 drives the purification chamber 7 to rotate, so that the purification chamber 7 performs slag skimming and stirring operations on the upper layer of the molten aluminum through the first feed port 8. +

[0081] Meanwhile, the jet head 6 provided at the bottom of the furnace body 1 injects inert gas into the bottom of the molten aluminum, and makes the hydrogen and inclusions in the molten aluminum float to the upper layer of the molten aluminum and be gradually discharged.

[0082] [[ID=ID=18]]During this process, the upper layer of the molten aluminum containing bubbles and inclusions will enter the inside of the purification chamber 7 through the first feed port 8 under the rotational stirring action of the purification chamber 7. A primary process mechanism composed of a stacking groove 20 and a metal filter screen 21 is provided at the first feed port 8. The molten aluminum filtered by the metal filter screen 21 enters the rotating feed block 11 inside the purification chamber 7, and the impurities are intercepted by the metal filter screen 21, and part of the impurities are collected through the stacking groove 20.

[0083] At this time, the rotating feed block 11 and the separation unit 13 arranged inside the purification chamber 7 rotate under the drive of the drive motor one 42.

[0084] The rotating feed block 11 rotates toward the feed port 8, and the collecting port 111 performs a scooping operation on the molten aluminum, so that the molten aluminum enters the rotating feed block 11. Under the action of the rotating action and the weight of the molten aluminum, when the rotating feed block 11 rotates to the top, the molten aluminum falls downward and passes through the ceramic filter plate 113 for preliminary filtration, and then falls into the fixed feed barrel 16 through the discharge port 112.

[0085] As the rotating feed block 11 continues to rotate, the aluminum liquid continues to enter the cylinder through the feed port 2 161 set at the top of the fixed feed cylinder 16, and since an inclined flow channel is set inside the fixed feed cylinder 16, the aluminum liquid is effectively guided to flow to the side of the separation unit 13.

[0086] The aluminum liquid is introduced into the separation unit 13 by the rotating feed block 11 and undergoes basic filtering operations to ensure the effectiveness of subsequent separation and degassing.

[0087] The aluminum liquid enters the composite hollow drive shaft 14 through the inclined flow channel. The inner wall of the composite hollow drive shaft 14 is provided with a plurality of drainage grooves 141 . Each drainage groove 141 is correspondingly installed with a separation block 131 , and the plurality of separation blocks 131 together constitute a separation unit 13 .

[0088] The separation block 131 rotates at high speed with the composite hollow drive shaft 14 to generate centrifugal force. The aluminum liquid in the composite hollow drive shaft 14 will be thrown into the separation block 131 and accumulate on the surface of the high-temperature breathable brick 133 after passing through the filter element 132 provided therein.

[0089] At this time, centrifugal force separates gases with large density differences, such as hydrogen, waste gas, and inert gas, from the aluminum liquid. Due to the density difference between gas and liquid, the gas will be thrown to the outside and slowly penetrate through the high-temperature breathable brick 133, while the aluminum liquid will slowly accumulate here.

[0090] Specifically, during the gas collection process, the external vacuum pump assembly vacuums the chamber formed by connecting the fixed cabin 9 and the docking seat 71 through the vacuum tube 2 51, and the interior of the chamber is connected to the gas cabin 12 through the corresponding gas circulation groove, and the gas cabin 12 is connected to the internal top side of each separation block 131 by the rotating sealing cover 121.

[0091] When the gas penetrates and escapes from the high-temperature breathable brick 133, the gas in this chamber will enter the gas chamber 12 through the air inlet groove 1211 set on the rotating sealing cover 121 with the assistance of vacuum suction, and flow upward through the gas chamber 12 to enter the chamber 1 72, and then be extracted through the vacuum tube 2 51.

[0092] Specifically, during the collection process of the molten aluminum, the gas inside the molten aluminum close to the side of the high-temperature breathable brick 133 has been greatly reduced. As the molten aluminum continues to accumulate here, its thrust on the surface of the high-temperature breathable brick 133 gradually increases, and exerts an outward force on the high-temperature breathable brick 133.

[0093] In a natural state, the high-temperature breathable brick 133 is tightened and clamped by the tooth plates 27 and the deflection frame 22 provided on both sides thereof.

[0094] When the high-temperature breathable brick 133 is forced to move outward, the moving frame 136 moves synchronously and drives the tooth plate 27 to move. At this time, the relative position of the tooth plate 27 and the deflection frame 22 changes, and the tooth plate 27 presses the gear shaft 23 in the middle of the deflection frame 22. When the force is sufficient to force the deflection frame 22 to deflect downward, the tooth plate 27 engages and snaps into the convex teeth of the gear shaft 23. At this time, the moving frame 136 is assisted by the gear rotation to improve the moving efficiency, and quickly pushes up, causing the moving frame 136 to expose the liquid separation port 135 starting from the outer wall of the separation block 131. At this time, the aluminum liquid quickly flows into the distribution rack 134 from the liquid separation port 135. The distribution rack 134 guides the aluminum liquid and discharges the aluminum liquid from the grid discharge port 1341 with the centrifugal force. Since the grid discharge port 1341 is assembled in the annular liquid collecting tank 18, no matter how the separation block 131 rotates, the aluminum liquid can always fall into the annular liquid collecting tank 18 smoothly. Since the annular liquid collecting tank 18 and the separation cabin 10 are both in a static state, the thrown aluminum liquid will fall from the annular groove to the discharge port 17 at the bottom. The discharge port 17 is connected to the outside to discharge the aluminum liquid.

[0095] Furthermore, when the aluminum liquid near the high-temperature breathable brick 133 is discharged, the force applied to the high-temperature breathable brick 133 is reduced, and the compressed tightening spring 26 is reset to drive the movable frame 136 to reset. At the same time, the tooth plate 27 moves relative to the gear shaft 23 again, and the coil spring 25 in the gear shaft 23 twists during the pushing process to generate a back torsional force, thereby driving the gear shaft 23 to rotate rapidly, causing the tooth plate 27, that is, the movable frame 136 to reset quickly, thereby preventing the undegassed aluminum liquid from being discharged.

[0096] Among them, the deflection frame 22 is tilted in the natural state and fits in the installation gap at the top of the tooth plate 27. Since the top of the tooth plate 27 is set as a rounded corner, as the tooth plate 27 is pushed up, the rounded corner structure assists the gear shaft 23 to slide to the first tooth groove position of the tooth plate 27 for clamping.

[0097] During this process, when the deflection frame 22 is subjected to a top pressure force, it is supported and reset by the bent reset strip 24 .

[0098] The inner corners of the distribution rack 134 are all rounded to prevent the accumulation of molten aluminum.

[0099] There is still a certain reasonable gap between the rotating feed block 11 and the inner wall of the purification chamber 7, and a number of through holes are opened on the bottom wall of the purification chamber 7 to drain the residual aluminum liquid that fails to enter the rotating feed block 11.

[0100] Among them, in actual application, the drive motor 42 drives the composite hollow drive shaft 14 to rotate at high speed through the coupling, and one end of the composite hollow drive shaft 14 drives the multiple planetary gears 153 to rotate through the planetary gear 153 and the fixed internal gear ring 152. The multiple sets of planetary gears 153 rotate around the axis of the composite hollow drive shaft 14, and the feed block 11 is rotated synchronously through the setting of the planetary disk 154 and the connecting frame 155. In this process, the transmission ratio of the planetary gear set 15 is converted to achieve rapid centrifugal rotation of the separation unit 13, and the rotating feed block 11 rotates at a lower speed.

[0101] It is worth noting that the furnace body 1 is specifically a vacuum insulation furnace, and its specific insulation materials, configuration and vacuuming process are all common knowledge to those skilled in the art.

[0102] Among them, it is worth noting that the connection between the fixed cabin 9 and the docking seat 71, the rotating connection between the rotating sealing cover 121 and the gas cabin 12, and the rotating connection between the grid discharge port 1341 and the annular liquid collecting tank 18 are all treated with high-temperature resistant sealing materials. Setting seals to ensure the normal operation of the equipment is a conventional setting operation in this field. Anything not explained in detail above will not be elaborated here.

[0103] It is worth noting that the specific transmission ratio and gear set configuration of the planetary gear set 15 are not explained in detail. Those skilled in the art can make flexible adjustments based on the actual operation site, so no further explanation is given.

[0104] Furthermore, by stirring or blowing inert gas, the hydrogen is accelerated to diffuse to the surface and discharged, forming tiny bubbles that absorb hydrogen and inclusions and float to the surface. The bubble surface absorbs the dissolved hydrogen and carries the inclusions to the surface. Due to different processes, the flux reacts with the oxide to generate low-density slag, which is collected and removed manually or automatically through the slag removal port.

[0105] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A vacuum purification and holding furnace for aluminum melt, comprising a furnace body (1), characterized in that: The interior of the furnace body (1) is equipped with a purification cabin (7) by a driving unit, and the interior of the purification cabin (7) is provided with a plurality of drive motors (42), and the drive motors (42) respectively drive the separation unit (13) and the rotating feed block (11) to rotate; A fixed feed barrel (16) is provided in the middle of the purification chamber (7), and a rotating feed block (11) is rotatably installed on the outer wall of the fixed feed barrel (16). The rotating feed block (11) rotates to pour the aluminum liquid into the fixed feed barrel (16), and the fixed feed barrel (16) introduces the aluminum liquid into the composite hollow drive shaft (14). The composite hollow drive shaft (14) is equipped with multiple groups of separation blocks (131) on the outside to form a separation unit (13), and a high-temperature air-permeable brick (133) is installed inside each separation block (131) through a movable frame (136), and the top of the high-temperature air-permeable brick (133) is in compression contact with the tightening spring (26); The movable frame (136) is provided with tooth plates (27) on both sides. The tooth plates (27) are limitedly assembled in mounting grooves (28) provided on the inner wall of the separation block (131). A tooth shaft (23) is provided in the mounting groove (28) at an angle through the deflection frame (22). The tooth shaft (23) and the tooth plates (27) form a meshing connection mechanism. When the movable frame (136) moves through the tooth shaft (23), the movable frame (136) is separated from the liquid separation port (135) provided on the inner wall of the separation block (131), and the liquid separation port (135) is externally connected to the material separation frame (134). One side of the separation block (131) is connected to the gas cabin (12) via a rotary sealing cover (121). The rotary sealing cover (121) is rotatably assembled on one side of the gas cabin (12). The top of the gas cabin (12) is connected to a chamber 1 (72) provided at the top of the purification cabin (7). One side of the chamber 1 (72) is provided with a vacuum tube 2 (51).

2. The aluminum melt vacuum purification and holding furnace according to claim 1, characterized in that: The driving unit comprises a hydraulic cylinder assembly (4) and a second driving motor (43). The hydraulic cylinder assembly (4) is assembled on a cover (3) provided on the upper part of the furnace body (1), and an integrated rod (41) is connected to the telescopic end thereof. The middle part of the integrated rod (41) is provided with a second driving motor (43). The output end of the second driving motor (43) is drivingly connected to the upper wall of the purification cabin (7). A fixed cabin (9) is provided at the bottom of the integrated rod (41), and the fixed cabin (9) is docked with a docking seat (71) provided at the top of the purification cabin (7) to form a chamber 1 (72), and the bottom of the chamber 1 (72) is communicated with the gas cabin (12).

3. The vacuum purification and holding furnace for molten aluminum according to claim 1, characterized in that: The upper portion of the furnace body (1) is provided with a cover body (3), and the cover body (3) is provided with a vacuum tube 1 (5) and a vacuum tube 2 (51). The vacuum tube 1 (5) is used to evacuate the interior of the furnace body (1), and one end of the vacuum tube 2 (51) is connected to the interior of the fixed cabin (9).

4. The aluminum melt vacuum purification and holding furnace according to claim 1, characterized in that: A feed port 1 (8) is provided on the outside of the purification chamber (7), and a stacking trough (20) is provided inside the feed port 1 (8) for assembling a metal filter (21).

5. The aluminum melt vacuum purification and holding furnace according to claim 1, characterized in that: On one side inside the purification chamber (7), a fixed feed cylinder (16) is fixedly installed. A rotary feed block (11) is rotatably installed on the upper part of the fixed feed cylinder (16). A collection port (111) is provided on one side of the rotary feed block (11) to introduce molten aluminum, and a discharge port (112) is provided on the side of the rotary feed block (11) facing the fixed feed cylinder (16) to discharge molten aluminum. On the upper part of the fixed feed cylinder (16), a second feed port (161) is provided. The second feed port (161) is connected to the inside of the cylinder body, and an inclined flow channel is provided inside the fixed feed cylinder (16), which is inclined towards the composite hollow drive shaft (14).

6. The aluminum melt vacuum purification and holding furnace according to claim 1, characterized in that: One end of the composite hollow drive shaft (14) is drivingly connected to a first drive motor (42), and the other end extends into a separation chamber (10) provided inside the purification chamber (7) and is connected to the input end of a planetary gear set (15). The output end of the planetary gear set (15) is connected to the rotary feed block (11). The planetary gear set (15) includes a drive gear (151), an internal gear ring (152), planetary gears (153), a planetary disk (154), and a connecting frame (155). The drive gear (151) is installed at one end of the composite hollow drive shaft (14). An internal gear ring (152) is fixedly provided on the outer side away from the drive gear (151). A plurality of planetary gears (153) are meshingly installed between the internal gear ring (152) and the drive gear (151). One side of each planetary gear (153) is assembled on the planetary disk (154). One end of the planetary disk (154) is connected to the rotary feed block (11) through a plurality of connecting frames (155).

7. The aluminum melt vacuum purification and holding furnace according to claim 1, characterized in that: A plurality of jet nozzles (6) are provided at the bottom end inside the furnace body (1).

8. The aluminum melt vacuum purification and holding furnace according to claim 1, characterized in that: One end of the deflection frame (22) is rotatably installed on the inner wall of the installation groove (28). A toothed shaft (23) is rotatably provided in the middle of the deflection frame (22). In the natural state, the toothed shaft (23) fits and engages in the upper groove of the moving frame (136). A spring (25) is provided at the rotational connection between the toothed shaft (23) and the deflection frame (22).

9. The aluminum melt vacuum purification and holding furnace according to claim 1, characterized in that: The moving frame (136) is limited and slidably installed inside the separation block (131). In the natural state, the moving frame (136) covers the outside of the liquid separation port (135). One side of the liquid separation port (135) is connected to a material distribution frame (134). The material distribution frame (134) is in the shape of "冂". A grid discharge port (1341) is provided at the top of the material distribution frame (134). The grid discharge port (1341) is limited and assembled in an annular liquid collection groove (18) provided on the inner wall of the separation chamber (10). A drain port (17) is provided at the bottom of the annular liquid collection groove (18) to communicate with the outside.

10. The aluminum melt vacuum purification and holding furnace according to claim 8, characterized in that: On one side of the bottom of the deflection frame (22), a bent reset strip (24) is provided. The other end of the bent reset strip (24) is connected to the inside of the separation block (131). When the deflection frame (22) is deflected by force, the bent reset strip (24) deforms.

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