Automatic refining system and method for aluminum melt

Abstract

The invention discloses an aluminum melt automatic refining system and a method thereof, and relates to the technical field of aluminum melt refining, the refining system comprises a melting furnace, a holding furnace and a degassing box which are sequentially connected through a launder; a furnace side rotating mechanism is arranged on the side wall of the heat preservation furnace and comprises a support fixed to the side wall of the heat preservation furnace and a rotating shaft rotationally connected to the support, and the rotating shaft is obliquely arranged and extends into an inner cavity of the heat preservation furnace. A driving motor is installed on the support and is in transmission connection with the rotating shaft to drive the rotating shaft to rotate, and stirring blades are arranged at the end, located in the inner cavity of the heat preservation furnace, of the rotating shaft. When the rotating shaft conveys refining gas to the inside, the rotating shaft rotates to stir internal aluminum melt, so that internal impurities and hydrogen are fully removed; and meanwhile, the rotating shaft rotates to automatically drive the slag removing rake to scrape and fish out waste slag on the surface of the aluminum melt, and meanwhile the cleaned waste slag is automatically scraped off the slag removing rake to be collected in a centralized mode.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum melt refining, and in particular to an aluminum melt automatic refining system and a method thereof. Background Art

[0002] Aluminum foil is a material that is directly rolled into thin sheets with metal aluminum. Aluminum foil is widely used in new energy battery substrates and aerospace fields due to its light weight, beautiful appearance, easy processing, anti-oxidation and corrosion resistance. The casting and rolling method of producing aluminum foil is to heat and melt the aluminum ingot, and then pour the liquid aluminum into the space between two rotating rollers through a casting and rolling machine. The rollers are filled with cooling water to solidify into a plate shape, and then rolled into a coil by a coiler, and then cold rolled and foil rolled for multiple times to obtain aluminum foil products of the required thickness. In the process of smelting aluminum ingots, the aluminum melt needs to be refined, among which hydrogen and oxide inclusions are the main substances that pollute the aluminum melt; the main defects in cast aluminum alloys - pores and slag inclusions, are caused by solid particles such as gases and oxides remaining in the alloy. Therefore, in order to obtain high-quality melts, it is also very important to refine and purify the aluminum melt.

[0003] The existing technology for refining aluminum melt is to pass argon and refining agent powder into the aluminum melt through a steel pipe. After the argon enters the aluminum melt, the hydrogen inside the aluminum melt is removed. The refining agent powder reacts with impurities in the aluminum melt to generate waste slag with lower density floating on the surface of the aluminum melt. The waste slag is then manually scraped out, which is labor-intensive for operators. The existing argon is directly passed into the aluminum melt through a steel pipe, and the bubbles it produces are large, float out quickly in the aluminum melt, have a short contact time with the aluminum melt, and have low efficiency in removing hydrogen from the melt. Therefore, a more efficient aluminum melt refining system is needed to achieve automatic and efficient refining of aluminum melt. Summary of the invention

[0004] The object of the present invention is to solve the above technical problems and to provide an automatic refining system and method for molten aluminum.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An automatic refining system for molten aluminum comprises a melting furnace, a holding furnace and a degassing box which are connected in sequence through a flow channel; the melting furnace is used to melt aluminum ingots and introduce the formed aluminum melt into the holding furnace after preliminary refining, the holding furnace heats the inflowing aluminum melt so that the aluminum melt is kept within a set temperature, the holding furnace introduces the aluminum melt into the degassing box through the flow channel, and the degassing box provides continuous aluminum melt for the casting and rolling line; a furnace side rotating mechanism is arranged on the side wall of the holding furnace, and the furnace side rotating mechanism comprises a bracket fixed to the side wall of the holding furnace and a rotating shaft rotatably connected to the bracket, The rotating shaft is arranged obliquely and extends into the inner cavity of the insulation furnace. The rotating shaft is a hollow structure to allow refined gas to be introduced into the insulation furnace. A driving motor is installed on the bracket, and the driving motor is transmission-connected to the rotating shaft to drive the rotating shaft to rotate. A stirring blade is provided at one end of the rotating shaft located in the inner cavity of the insulation furnace. Air-permeable bricks are installed at the bottom of the insulation furnace, and the refined gas is converted into uniform and fine bubbles through the air-permeable bricks and introduced into the aluminum melt. Air-permeable bricks are provided at the bottom of the degassing box, and an air inlet pipe fixed to the degassing box is provided at the bottom of the air-permeable bricks, and the air inlet pipe is used to introduce refined gas.

[0007] Furthermore, the stirring blades are sheet-like structures arranged spirally along the rotating shaft.

[0008] Furthermore, a slag scraping device is provided in the insulation furnace, and the slag scraping device includes a slide rail fixed on the top of the insulation furnace, a slider is slidably connected to the slide rail, a suspension rod is fixedly connected to the slide rail, a floating block which moves up and down along the suspension rod is provided on the suspension rod, and the floating block is a hollow structure so that the floating block floats on the surface of the aluminum melt; a slag cleaning rake is fixedly connected to the floating block, and an active rotary wheel and a driven rotary wheel are rotatably connected to the upper end of the insulation furnace, the active rotary wheel is transmission-connected to the rotating shaft so that the rotating shaft drives the active rotary wheel to rotate, a conveyor belt is sleeved between the active rotary wheel and the driven rotary wheel, a driving rod is fixedly connected to the conveyor belt, a slide groove is provided on the slide block, the slide groove is located below the conveyor belt, the driving rod is inserted in the slide groove, and the driving rod drives the slide block to reciprocate along the slide rail when the conveyor belt moves around the active rotary wheel and the driven rotary wheel.

[0009] Furthermore, a slag discharge mechanism is provided in the insulation furnace, and the slag discharge mechanism includes a slag discharge wheel rotatably arranged on the insulation furnace, a slag discharge wheel outer shell is provided with a slag discharge transmission belt, and the rotation of the slag discharge wheel drives the slag discharge transmission belt to move around the slag discharge wheel, and a scraper is provided on the slag discharge transmission belt. A collecting box is provided on one side of the insulation furnace, and when the slag cleaning rake approaches the scraper, the scraper moves to scrape the waste slag on the slag cleaning rake into the collecting box; the slag discharge wheels are provided with 3 pieces, and the 3 slag discharge wheels are arranged in a triangle, and the middle piece of the slag discharge wheel is transmission connected to the rotating shaft.

[0010] Furthermore, the slag cleaning rake includes a vertical plate and transverse rake teeth fixed at the lower end of the plate, and the transverse rake teeth are located on the side of the plate close to the slag discharge mechanism. When scraping off the waste slag on the surface of the aluminum melt, the transverse rake teeth sink below the liquid level of the aluminum melt.

[0011] Furthermore, a push rod is provided on the floating block, and a lifting block is fixedly connected to the inner side wall of the insulation furnace. The lifting block is provided with an abutment slope, and the lower end of the abutment slope is inclined toward the floating block. When the floating block approaches the lifting block, the push rod abuts and squeezes the abutment slope so that the push rod slides upward along the abutment slope, driving the floating block to move obliquely upward, driving the slag cleaning rake to move below the scraper so that the scraper scrapes off the waste slag on the slag cleaning rake.

[0012] Furthermore, a locking mechanism is installed on the slider, a locking rod is provided on the floating block, a locking tongue is fixedly connected to the upper end of the locking rod, and the locking tongue is locked in the locking mechanism during the upward movement of the floating block. An unlocking rod is fixedly connected to the side of the insulation furnace away from the lifting block. When the floating block moves close to the unlocking rod, the unlocking rod drives the locking mechanism to unlock the lock tongue.

[0013] Furthermore, the locking mechanism includes a moving block arranged on the slider, the slider is provided with an installation cavity, the moving block is slidably arranged in the installation cavity, a first compression spring is arranged in the installation cavity, the first compression spring is located on the side of the moving block away from the unlocking rod, a locking block is fixedly connected to the moving block, the locking block extends to the bottom of the slider, the locking block is provided with a transversely penetrating locking hole, the upper end of the lock tongue is provided with an extrusion slope, and when the lock tongue moves upward, the extrusion slope presses the locking block so that the lock tongue is stuck in the locking hole from the side of the locking block close to the unlocking rod; when the slider is close to the unlocking rod, the end of the unlocking rod presses the locking block so that the locking block moves to disengage from the lock tongue and unlock.

[0014] Further, a first bevel gear is fixedly connected to the rotating shaft, a second transmission shaft is rotatably connected to the bracket, and the second transmission shaft is fixedly connected to the second bevel gear, and the first bevel gear is meshed with the second bevel gear to form a gear transmission; a third bevel gear is fixedly connected to the second transmission shaft, and one of the slag discharge wheels is fixedly connected to the third transmission shaft, the third transmission shaft is rotatably connected to the insulation furnace, and the third transmission shaft is fixedly connected to a fourth bevel gear, and the third bevel gear is meshed with the fourth bevel gear to form a gear transmission; the axis of the driving wheel is fixedly connected to the fourth transmission shaft, the fourth transmission shaft is rotatably connected to the insulation furnace, and the fourth transmission shaft is fixedly connected to a fifth bevel gear, and a horizontally arranged fifth transmission shaft is provided on the insulation furnace, and the fifth transmission shaft is fixedly connected to a sixth bevel gear, and the fifth bevel gear is meshed with the sixth bevel gear to form a gear transmission, and one end of the fifth transmission shaft extends to the outside of the insulation furnace and is fixedly connected to a seventh bevel gear, and the second transmission shaft is fixedly connected to an eighth bevel gear, and the seventh bevel gear is meshed with the eighth bevel gear to form a gear transmission.

[0015] Furthermore, a rotating drum is arranged on the bracket, the rotating shaft is rotatably connected to the rotating drum, a ventilation joint is fixedly connected to the rotating drum, an annular groove is provided on the inner wall of the rotating drum, and ventilation holes arranged along the axial direction of the rotating shaft are provided on the rotating shaft, the ventilation holes extend to the end of the rotating shaft located at one end of the insulation furnace, the rotating shaft is provided with an air inlet hole at the position of the annular groove, the air inlet hole penetrates into the ventilation hole of the rotating shaft, and the ventilation joint is communicated with the annular groove to transport the refined gas into the annular groove and pass it into the ventilation hole of the rotating shaft.

[0016] Another aspect of the present invention provides an automatic refining method for molten aluminum, using the above-mentioned automatic refining system for molten aluminum, according to the following steps:

[0017] S1, putting an aluminum ingot into a melting furnace, heating and melting the aluminum ingot to form an aluminum melt, and conveying the liquid aluminum melt to a holding furnace through a launder;

[0018] S2, starting the driving motor on the side wall bracket of the holding furnace, driving the rotating shaft to rotate and stir the aluminum melt flowing into the holding furnace, and filling the holding furnace with argon gas mixed with refining agent powder through the rotating shaft, and refining the aluminum melt by the argon gas and the refining agent powder;

[0019] S3. The aluminum melt refined in the holding furnace is continuously transported to the degassing box through the flow channel, and the refined gas is transported to the degassing box through the air inlet pipe to further refine the aluminum melt. The refined aluminum melt is continuously transported to the casting and rolling production line for casting and rolling, and the output is aluminum foil billet.

[0020] The present invention provides an automatic refining system and method for aluminum melt, which has the following beneficial effects: a furnace side rotating mechanism is arranged on the side of the insulation furnace to feed refining gas and refining agent powder into the aluminum melt in the insulation furnace, so as to remove hydrogen and impurities in the aluminum melt; at the same time, the rotating shaft is driven to rotate, and the rotating shaft drives the stirring blades to rotate while ventilating to stir the aluminum melt in the insulation furnace, so that the gas input into the aluminum melt is dispersed into small bubbles, the contact area is increased, the rising speed of the bubbles is slowed down, and the contact time between the bubbles and the aluminum melt is increased; by utilizing the diffusion phenomenon, hydrogen enters from the aluminum melt with a high hydrogen concentration into the bubbles with a low hydrogen concentration, thereby facilitating the gas in the aluminum melt. The high-density aluminum is precipitated into the bubbles and is taken out and removed; the refining agent powder entering the aluminum melt reacts with the impurities in the aluminum melt under stirring to generate waste slag floating on the liquid surface of the aluminum melt; at the same time, the stirring drives the internal aluminum melt to flow, so that the internal aluminum melt and the bubbles are fully in contact, so that the hydrogen and impurities are removed more evenly; when the shaft transports the refined gas to the inside, the shaft rotates to stir the internal aluminum melt, so that the internal impurities and hydrogen are fully removed, and at the same time, the rotation of the shaft automatically drives the slag cleaning rake to scrape and remove the waste slag on the surface of the aluminum melt, and at the same time automatically drives the scraper to rotate and move around the slag discharge wheel with the slag discharge drive belt, and then scrapes the cleaned waste slag off the slag cleaning rake for centralized collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings:

[0022] Figure 1 The present invention provides a schematic structural diagram of an automatic aluminum melt refining system.

[0023] Figure 2 The present invention provides a schematic left view of the internal structure of a holding furnace in an automatic refining system for molten aluminum.

[0024] Figure 3 for Figure 2 Schematic diagram of the local structure of part A in the middle.

[0025] Figure 4 for Figure 2 Schematic diagram of the local structure of part B in the middle.

[0026] Figure 5 The present invention provides a schematic structural diagram of a slag cleaning rake in an automatic refining system for aluminum melt.

[0027] Figure 6 The present invention provides a schematic diagram of the end structure of a rotating shaft in an automatic refining system for molten aluminum.

[0028] Figure 7 The present invention provides a schematic front view of the internal structure of a heat preservation furnace in an automatic refining system for aluminum melt.

[0029] Figure 8 The present invention provides a schematic top view of the cooperation between a driving rod and a sliding block in an automatic refining system for aluminum melt.

[0030] Fig. 9 A schematic diagram of the internal structure of a lifting block in a holding furnace of an automatic refining system for aluminum melt provided by the present invention, wherein the lifting block lifts the floating block.

[0031] Fig.10 for Fig. 9 Schematic diagram of the local structure of part C in the middle.

[0032] Fig.11 for Fig.10 Schematic diagram of the local structure of part D in the middle.

[0033] Fig.12 A schematic diagram of the internal structure of a lifting block in a holding furnace of an automatic refining system for aluminum melt provided by the present invention, wherein the lifting block lifts the floating block.

[0034] Explanation of the reference numerals in the figure: 1. Melting furnace; 2. Holding furnace; 21. Unlocking lever; 22. Fifth transmission shaft; 23. Sixth bevel gear; 24. Seventh bevel gear; 3. Degassing box; 31. Breathable brick; 4. Flow chute; 5. Furnace side rotating mechanism; 51. Bracket; 52. Rotating shaft; 53. Driving motor; 54. Stirring blade; 55. First bevel gear; 56. Rotating drum; 57. Ventilation joint; 58. Ventilation hole; 59. Air inlet hole; 6. Slag scraping device; 61. Slide rail; 62. Sliding block; 621. Slide chute; 63. Hanging rod; 64. Floating block; 65. Slag cleaning rake; 651. Vertical plate; 652. Horizontal rake teeth; 66. Active Rotary wheel; 67, driven rotary wheel; 68, conveyor belt; 69, driving rod; 610, push rod; 611, lifting block; 612, abutting inclined surface; 613, locking rod; 614, locking tongue; 615, fourth transmission shaft; 616, fifth bevel gear; 7, slag discharge mechanism; 71, slag discharge rotary wheel; 72, slag discharge transmission belt; 73, scraper; 74, collecting box; 75, third transmission shaft; 76, fourth bevel gear; 8, locking mechanism; 81, moving block; 82, first compression spring; 83, locking block; 84, locking hole; 9, second transmission shaft; 91, second bevel gear; 92, third bevel gear; 93, eighth bevel gear. DETAILED DESCRIPTION

[0035] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that all directional indications in the embodiments of the present invention (such as up-down-left-right-front-back...) are only used to explain the relative position relationship - movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.

[0038] like Figure 1-Figure 12 As shown, an automatic refining system for aluminum melt comprises a melting furnace 1, a holding furnace 2, and a degassing box 3 which are connected in sequence through a flow channel 4; the melting furnace 1 is used to melt aluminum ingots and introduce the formed aluminum melt into the holding furnace 2 after preliminary refining, the holding furnace 2 keeps the inflowing aluminum melt warm so that the aluminum melt is kept within a set temperature, the holding furnace 2 introduces the aluminum melt into the degassing box 3 through the flow channel 4, and the degassing box 3 provides continuous aluminum melt for the casting and rolling line;

[0039] A furnace side rotating mechanism 5 is provided on the side wall of the insulation furnace 2, and the furnace side rotating mechanism 5 includes a bracket 51 fixed to the side wall of the insulation furnace 2 and a rotating shaft 52 rotatably connected to the bracket 51, the rotating shaft 52 is arranged obliquely and extends into the inner cavity of the insulation furnace 2, and the rotating shaft 52 is a hollow structure to pass the refining gas into the insulation furnace 2; a driving motor 53 is installed on the bracket 51, and the driving motor 53 is in transmission connection with the rotating shaft 52 to drive the rotating shaft 52 to rotate, and a stirring blade 54 is provided at one end of the rotating shaft 52 located in the inner cavity of the insulation furnace 2;

[0040] The bottom of the holding furnace 2 is provided with a permeable brick 31; the bottom of the degassing box 3 is provided with a permeable brick 31, and the bottom of the permeable brick 31 is provided with an air inlet pipe fixed on the degassing box 3, and the air inlet pipe is used to pass the refined gas. The refined gas is converted into uniform and fine bubbles through the permeable brick 31 and passed into the aluminum melt.

[0041] By adopting the above technical scheme, a furnace side rotating mechanism 5 is arranged on the side of the insulation furnace 2 to feed refining gas and refining agent powder into the aluminum melt in the insulation furnace 2, so as to remove hydrogen and impurities in the aluminum melt. At the same time, the rotating shaft 52 is driven to rotate. While ventilating, the rotating shaft 52 drives the stirring blade 54 to rotate to stir the aluminum melt in the insulation furnace 2, so that the gas input into the aluminum melt is dispersed into small bubbles, the contact area is increased, the rising speed of the bubbles is slowed down, and the contact time between the bubbles and the aluminum melt is increased. By utilizing the diffusion phenomenon, hydrogen enters the bubbles with low hydrogen concentration from the aluminum melt with high hydrogen concentration, so that the gas in the aluminum melt is precipitated from the high-density aluminum into the bubbles and is taken out and removed; and the refining agent powder entering the aluminum melt reacts with the impurities in the aluminum melt under stirring to generate waste slag floating on the liquid surface of the aluminum melt; at the same time, the stirring drives the internal aluminum melt to flow, so that the internal aluminum melt is fully in contact with the bubbles, so that the hydrogen and impurities are removed more evenly.

[0042] Specifically, the stirring blades 54 are sheet-like structures arranged spirally along the rotating shaft 52. When the rotating shaft 52 drives the stirring blades 54 to rotate, the stirring blades 54 generate thrust on the aluminum melt, so that the aluminum melt circulates, improves the fluidity of the aluminum melt, and facilitates the bubbles formed by the refining gas to be more dispersed in the aluminum melt.

[0043] Specifically, the refining gas introduced is argon. The rotating shaft 52 is a graphite rotating shaft 52. Specifically, the air-permeable bricks 31 are provided at multiple locations and are distributed at the feed port and the discharge port of the degassing box 3. The air-permeable bricks 31 are provided near the feed port and the discharge port, so that the incoming aluminum melt is refined in time and the outflowing aluminum melt is refined more fully, ensuring that the hydrogen content in the outflowing aluminum melt is at the lowest state, thereby improving the refining efficiency.

[0044] Specifically, the holding furnace 2 is provided with a scraping device 6, and the scraping device 6 includes a slide rail 61 fixed on the top of the holding furnace 2, and a slider 62 is slidably connected to the slide rail 61, and a suspension rod 63 is fixedly connected to the slider 62, and a floating block 64 that moves up and down along the suspension rod 63 is provided on the suspension rod 63, and the floating block 64 is a hollow structure so that the floating block 64 floats on the surface of the aluminum melt; a slag cleaning rake 65 is fixedly connected to the floating block 64, and a driving wheel 66 and a driven wheel 67 are rotatably connected to the upper end of the holding furnace 2, and the driving wheel 66 is in transmission connection with the rotating shaft 52 so that the rotating shaft 52 drives the active rotating wheel 66 to rotate, a conveyor belt 68 is sleeved between the active rotating wheel 66 and the driven rotating wheel 67, a driving rod 69 is fixedly connected to the conveyor belt 68, a slide groove 621 is provided on the slider 62, the slide groove 621 is located below the conveyor belt 68, the driving rod 69 is inserted in the slide groove 621, when the driving rod 69 moves from one side of the active rotating wheel 66 to the other side of the active rotating wheel 66 along the conveyor belt 68, the driving rod 69 slides along the slide groove 621, and the driving rod 69 drives the slider 62 to reciprocate along the slide rail 61 when it moves around the active rotating wheel 66 and the driven rotating wheel 67 along with the conveyor belt 68. When the conveyor belt 68 rotates around the active wheel 66, the suspension rod 63 is driven to drive the slag cleaning rake 65 to move, thereby removing the waste slag on the surface of the holding furnace 2; the rotation of the rotating shaft 52 drives the active wheel 66 to rotate, thereby driving the conveyor belt 68 to move around the active wheel 66 and the driven wheel 67, and then drives the slider 62 to move back and forth along the slide rail 61, the slider 62 drives the suspension rod 63 to move back and forth, and the suspension rod 63 drives the floating block 64 to move to scrape the waste slag on the liquid surface to one side and then remove it, so that the rotating shaft 52 can automatically drive the slag cleaning rake 65 to remove the waste slag while rotating to transport the refining gas and refining agent; at the same time, the floating block 64 floats on the liquid surface of the aluminum melt. After the aluminum melt is added, the floating block 64 automatically floats up as the liquid level rises, so that the waste slag on the liquid surface at different heights can be automatically removed.

[0045] Specifically, a slag discharge mechanism 7 is provided in the holding furnace 2, and the slag discharge mechanism 7 includes a slag discharge wheel 71 rotatably arranged on the holding furnace 2, and a slag discharge transmission belt 72 is provided on the outer sleeve of the slag discharge wheel 71. The rotation of the slag discharge wheel 71 drives the slag discharge transmission belt 72 to move around the slag discharge wheel 71, and a scraper 73 is provided on the slag discharge transmission belt 72. A collecting box 74 is provided on one side of the holding furnace 2. When the slag cleaning rake 65 approaches the scraper 73, the scraper 73 moves to scrape the waste slag on the slag cleaning rake 65 into the collecting box 74; the slag discharge wheel 71 is provided with three pieces, and the three slag discharge wheels 71 are arranged in a triangle, and the middle piece of the slag discharge wheel 71 is transmission-connected to the rotating shaft 52. By setting up the slag discharge mechanism 7, when the rotating shaft 52 rotates for ventilation, the slag discharge wheel 71 is automatically driven to rotate, and the scraper 73 is driven to move. The scraper 73 moves to scrape the waste slag on the nearby slag cleaning rake 65 toward the side wall of the insulation furnace 2, and the scraped waste slag falls into the collection box 74, so that the waste slag generated by refining is cleaned and collected; and then when the rotating shaft 52 transports the refining gas to the inside, the rotating shaft 52 rotates to stir the internal aluminum melt, so that the internal impurities and hydrogen are fully removed, and at the same time, the rotating shaft 52 rotates to automatically drive the slag cleaning rake 65 to scrape and remove the waste slag on the surface of the aluminum melt, and at the same time, the scraper 73 is automatically driven to rotate and move around the slag discharge wheel 71 with the slag discharge transmission belt 72, and then the cleaned waste slag is scraped off the slag cleaning rake 65 for centralized collection.

[0046] Specifically, the slag removal rake 65 includes a vertical plate 651 and transverse rake teeth 652 fixed at the lower end of the plate 651, and the transverse rake teeth 652 are located on the side of the plate 651 close to the slag discharge mechanism 7, and the transverse rake teeth 652 are sunk below the liquid surface of the aluminum melt when scraping off the waste slag on the surface of the aluminum melt. This facilitates scraping off the waste slag foam floating on the surface of the aluminum melt, and when the waste slag is fished out, the aluminum liquid leaks from the gaps in front of the transverse rake teeth 652.

[0047] Specifically, a push rod 610 is provided on the floating block 64, and a lifting block 611 is fixedly connected to the inner side wall of the insulation furnace 2. A contact slope 612 is provided on the lifting block 611, and the lower end of the contact slope 612 is inclined toward the floating block 64. When the floating block 64 approaches the lifting block 611, the push rod 610 is abutted and squeezed against the contact slope 612, so that the push rod 610 slides upward along the contact slope 612, driving the floating block 64 to move obliquely upward, and driving the slag cleaning rake 65 to move to the bottom of the scraper 73 so that the scraper 73 scrapes off the waste slag on the slag cleaning rake 65. The floating block 64 is driven by the suspension rod 63 to move and scrape the waste slag on the surface of the aluminum melt to one side. When the floating block 64 is close to the lifting block 611, the push rod 610 abuts against the abutting slope 612 of the lifting block 611. Under the pressure of the abutting slope 612, the push rod 610 slides upward along the abutting slope 612, so that the floating block 64 moves obliquely upward, thereby driving the slag cleaning rake 65 to move upward while moving forward, so that the slag cleaning rake 65 leaves the liquid surface of the aluminum melt upward to pick up the waste slag, and the slag cleaning rake 65 moves upward to the bottom of the scraper 73. The scraper 73 moves driven by the slag discharge transmission belt to scrape the waste slag on the slag cleaning rake 65, and then scrapes the waste slag into the collection box 74 at one end of the slag cleaning rake 65.

[0048] Specifically, a locking mechanism 8 is installed on the slider 62, and a locking rod 613 is provided on the floating block 64. A locking tongue 614 is fixedly connected to the upper end of the locking rod 613. During the upward movement of the floating block 64, the locking tongue 614 is locked in the locking mechanism 8. An unlocking rod 21 is fixedly connected to the side of the insulation furnace 2 away from the lifting block 611. When the floating block 64 moves close to the unlocking rod 21, the unlocking rod 21 drives the locking mechanism 8 to unlock the locking tongue 614. When the push rod 610 abuts against the lifting block 611, the floating block 64 moves upward, and the locking rod 613 moves upward close to the slider 62. The locking tongue 614 at the upper end of the locking rod 613 is locked by the locking mechanism 8, so that the floating block 64 remains above the surface of the aluminum melt after moving upward. The floating block 64 is driven back by the conveyor belt 68, so that the slag cleaning rake 65 is located above the aluminum melt when it moves back away from the lifting block 611, and then when it moves to the end of the slide rail 61 away from the lifting block 611, it is unlocked by the unlocking rod 21, so that the slag cleaning rake 65 slides downward into the aluminum melt, and then the waste slag on the surface of the aluminum melt can be scraped and removed in one direction, thereby improving the waste slag cleaning efficiency and avoiding pushing the liquid surface waste slag to the other side during the return stroke, which makes it impossible to scrape off the waste slag.

[0049] Specifically, the locking mechanism 8 includes a moving block 81 arranged on the slider 62, the slider 62 is provided with an installation cavity, the moving block 81 is slidably arranged in the installation cavity, a first compression spring 82 is arranged in the installation cavity, the first compression spring 82 is located on the side of the moving block 81 away from the unlocking rod 21, a locking block 83 is fixedly connected to the moving block 81, the locking block 83 extends to the bottom of the slider 62, a transversely penetrating locking hole 84 is provided on the locking block 83, and an extrusion slope is provided on the upper end of the lock tongue 614. When the lock tongue 614 moves upward, the extrusion slope presses the locking block 83 so that the lock tongue 614 is stuck in the locking hole 84 from the side of the locking block 83 close to the unlocking rod 21; when the slider 62 is close to the unlocking rod 21, the end of the unlocking rod 21 presses the locking block 83 so that the locking block 83 moves to disengage from the lock tongue 614 and unlocks. The locking block 83 cooperates with the locking tongue 614, so that the locking tongue 614 is stuck in the locking hole 84 when the floating block 64 moves upward, thereby keeping the floating block 64 suspended above the aluminum melt. When the floating block 64 moves close to the unlocking rod 21, the unlocking rod 21 presses the locking block 83, and the locking block 83 moves along the installation cavity away from the unlocking rod 21, so that the locking block 83 is disengaged from the locking tongue 614, and the floating block 64 slides downward, so that the slag cleaning rake 65 falls back into the aluminum melt, and the waste slag scraping operation is repeated.

[0050] Specifically, the rotating shaft 52 is fixedly connected with a first bevel gear 55, the bracket 51 is rotatably connected with a second transmission shaft 9, the second transmission shaft 9 is fixedly connected with a second bevel gear 91, and the first bevel gear 55 meshes with the second bevel gear 91 to form a gear transmission; the second transmission shaft 9 is fixedly connected with a third bevel gear 92, one of the slag discharge wheels 71 is fixedly connected with a third transmission shaft 75, the third transmission shaft 75 is rotatably connected with the insulation furnace 2, the third transmission shaft 75 is fixedly connected with a fourth bevel gear 76, and the third bevel gear 92 meshes with the fourth bevel gear 76 to form a gear transmission; the driving wheel 66 The shaft center is fixedly connected with a fourth transmission shaft 615, which is rotatably connected with the holding furnace 2, and a fifth bevel gear 616 is fixedly connected to the fourth transmission shaft 615. The holding furnace 2 is provided with a horizontally arranged fifth transmission shaft 22, and a sixth bevel gear 23 is fixedly connected to the fifth transmission shaft 22, and the fifth bevel gear 616 meshes with the sixth bevel gear 23 to form a gear transmission. One end of the fifth transmission shaft extends to the outside of the holding furnace 2 and is fixedly connected with a seventh bevel gear 24, and the second transmission shaft 9 is fixedly connected with an eighth bevel gear 93, and the seventh bevel gear 24 meshes with the eighth bevel gear 93 to form a gear transmission. The rotating shaft 52 is driven by the driving wheel 66 through the bevel gear, and is driven by the slag removal wheel 71 through the gear transmission, so that when the rotating shaft 52 rotates, the slag cleaning rake 65 is automatically driven to move, and the scraper 73 is automatically driven to scrape the waste slag on the slag cleaning rake 65.

[0051] Specifically, a rotating drum 56 is provided on the bracket 51, the rotating shaft 52 is rotatably connected to the rotating drum 56, a vent joint 57 is fixedly connected to the rotating drum 56, an annular groove is provided on the inner wall of the rotating drum 56, an vent hole 58 is provided on the rotating shaft 52 and arranged along the axial direction of the rotating shaft 52, the vent hole 58 extends to the end of the rotating shaft 52 located at one end of the insulation furnace 2, the rotating shaft 52 is provided with an air inlet 59 at the position of the annular groove, the air inlet 59 penetrates into the vent hole 58 of the rotating shaft 52, the vent joint 57 is connected with the annular groove to transport the refined gas into the annular groove and pass it into the vent hole 58 of the rotating shaft 52. After the refined gas is passed into the vent hole 58, it is blown out from the end of the rotating shaft 52 located at one end of the insulation aluminum, so that the refined gas is passed into the aluminum melt.

[0052] Specifically, the insulation furnace 2 is provided with a thermocouple for measuring temperature, and the insulation furnace 2 is provided with a heating tube for heating the aluminum melt. When the temperature is lower than a set value, the heating tube heats the aluminum melt to maintain the aluminum melt at the set temperature.

[0053] The present invention discloses an automatic refining method for molten aluminum, which adopts the automatic refining system for molten aluminum, and follows the following steps:

[0054] S1, putting an aluminum ingot into a melting furnace 1, heating and melting the aluminum ingot to form an aluminum melt, and conveying the liquid aluminum melt to a holding furnace 2 through a launder 4;

[0055] S2, starting the driving motor 53 on the side wall bracket of the holding furnace 2, driving the rotating shaft 52 to rotate and stir the aluminum melt flowing into the holding furnace 2, and charging argon gas mixed with refining agent powder into the holding furnace 2 through the rotating shaft 52, and refining the aluminum melt by the argon gas and the refining agent powder;

[0056] S3, the aluminum melt refined in the holding furnace 2 is continuously transported to the degassing box 3 through the flow channel 4, and the refined gas is transported to the degassing box 3 through the air inlet pipe to further refine the aluminum melt. The refined aluminum melt is continuously transported to the casting and rolling production line for casting and rolling into aluminum foil billets.

[0057] The parts not involved in this technical solution can be implemented by using existing technologies.

[0058] The above shows and describes the basic principles, main features and characteristics of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of the present invention to be protected includes the attached claims and their equivalents.

Claims

1. An automatic refining system for aluminum melt, comprising a melting furnace (1), a holding furnace (2), and a degassing box (3) connected in sequence through a flow channel (4); characterized in that: A furnace side rotating mechanism (5) is arranged on the side wall of the insulation furnace (2), and the furnace side rotating mechanism (5) comprises a bracket (51) fixed to the side wall of the insulation furnace (2) and a rotating shaft (52) rotatably connected to the bracket (51), the rotating shaft (52) is arranged obliquely and extends into the inner cavity of the insulation furnace (2), and the rotating shaft (52) is a hollow structure for passing refined gas into the insulation furnace (2); a driving motor (53) is installed on the bracket (51) The driving motor (53) is connected to the rotating shaft (52) in a transmission manner to drive the rotating shaft (52) to rotate; a stirring blade (54) is provided at one end of the rotating shaft (52) located in the inner cavity of the heat preservation furnace (2); a permeable brick (31) is installed at the bottom of the heat preservation furnace (2); a permeable brick (31) is provided at the bottom of the degassing box (3); an air inlet pipe fixed to the degassing box (3) is provided at the bottom of the permeable brick (31); and the air inlet pipe is used to introduce refined gas.

2. The automatic refining system for aluminum melt according to claim 1, characterized in that: A slag scraping device (6) is provided in the insulation furnace (2), and the slag scraping device (6) comprises a slide rail (61) fixed on the top of the insulation furnace (2), a slider (62) is slidably connected to the slide rail (61), a suspension rod (63) is fixedly connected to the slider (62), a floating block (64) is provided on the suspension rod (63) and moves up and down along the suspension rod (63), and the floating block (64) is a hollow structure so that the floating block (64) floats on the surface of the aluminum melt; a slag cleaning rake (65) is fixedly connected to the floating block (64), and a driving wheel (66) and a driven wheel (67) are rotatably connected to the upper end of the insulation furnace (2). The driving rotating wheel (66) is in transmission connection with the rotating shaft (52) so that the rotating shaft (52) drives the driving rotating wheel (66) to rotate. A conveyor belt (68) is sleeved between the driving rotating wheel (66) and the driven rotating wheel (67). A driving rod (69) is fixedly connected to the conveyor belt (68). A slide groove (621) is provided on the slider (62). The slide groove (621) is located below the conveyor belt (68). The driving rod (69) is inserted into the slide groove (621). When the driving rod (69) moves around the driving rotating wheel (66) and the driven rotating wheel (67) along with the conveyor belt (68), the slider (62) is driven to move back and forth along the slide rail (61).

3. The automatic refining system of aluminum melt according to claim 2, characterized in that: A slag discharge mechanism (7) is provided in the holding furnace (2), and the slag discharge mechanism (7) comprises a slag discharge wheel (71) rotatably arranged on the holding furnace (2), a slag discharge transmission belt (72) is provided on the outer shell of the slag discharge wheel (71), the slag discharge wheel (71) rotates to drive the slag discharge transmission belt (72) to move around the slag discharge wheel (71), a scraper (73) is provided on the slag discharge transmission belt (72), and a collection box (74) is provided on one side of the holding furnace (2), and when the slag cleaning rake (65) approaches the scraper (73), the scraper (73) moves to scrape the waste slag on the slag cleaning rake (65) into the collection box (74); the slag discharge wheel (71) is provided with three pieces, and the three slag discharge wheels (71) are arranged in a triangle, and the middle slag discharge wheel (71) is drivingly connected to the rotating shaft (52).

4. The automatic refining system for molten aluminum according to claim 2, characterized in that: The slag cleaning rake (65) comprises a vertical upright plate (651) and transverse rake teeth (652) fixed at the lower end of the upright plate (651), and the transverse rake teeth (652) are located on a side of the upright plate (651) close to the slag discharge mechanism (7), and when scraping off waste slag on the surface of the aluminum melt, the transverse rake teeth (652) sink below the liquid surface of the aluminum melt.

5. The automatic refining system for aluminum melt according to claim 3 is characterized in that: The floating block (64) is provided with a push rod (610), and a lifting block (611) is fixedly connected to the inner side wall of the insulation furnace (2). The lifting block (611) is provided with an abutting inclined surface (612), and the lower end of the abutting inclined surface (612) is inclined toward the floating block (64). When the floating block (64) approaches the lifting block (611), the push rod (610) and the abutting inclined surface (612) are abutted and squeezed, so that the push rod (610) slides upward along the abutting inclined surface (612), driving the floating block (64) to move obliquely upward, driving the slag cleaning rake (65) to move below the scraper (73) so that the scraper (73) scrapes the waste slag on the slag cleaning rake (65).

6. The automatic refining system for molten aluminum according to claim 5, characterized in that: A locking mechanism (8) is installed on the slider (62), a locking rod (613) is provided on the floating block (64), a locking tongue (614) is fixedly connected to the upper end of the locking rod (613), and the locking tongue (614) is locked in the locking mechanism (8) during the upward movement of the floating block (64). An unlocking rod (21) is fixedly connected to the side of the insulation furnace (2) away from the lifting block (611), and when the floating block (64) moves close to the unlocking rod (21), the unlocking rod (21) drives the locking mechanism (8) to unlock the locking tongue (614).

7. The automatic refining system for molten aluminum according to claim 6, characterized in that: The locking mechanism (8) comprises a moving block (81) arranged on a slider (62), a mounting cavity being provided on the slider (62), the moving block (81) being slidably arranged in the mounting cavity, a first compression spring (82) being arranged in the mounting cavity, the first compression spring (82) being located on a side of the moving block (81) away from the unlocking rod (21), a locking block (83) being fixedly connected to the moving block (81), the locking block (83) extending to the bottom of the slider (62), the locking block A transversely extending locking hole (84) is provided on the locking block (83), and an extrusion slope is provided on the upper end of the locking tongue (614). When the locking tongue (614) moves upward, the extrusion slope presses the locking block (83) so that the locking tongue (614) is clamped from the locking block (83) close to the unlocking rod (21) and is inserted into the locking hole (84); when the sliding block (62) is close to the unlocking rod (21), the end of the unlocking rod (21) presses the locking block (83) so that the locking block (83) moves to be disengaged from the locking tongue (614) and unlocked.

8. The automatic refining system for molten aluminum according to claim 7, characterized in that: The rotating shaft (52) is fixedly connected with a first bevel gear (55); the bracket (51) is rotatably connected with a second transmission shaft (9); the second transmission shaft (9) is fixedly connected with a second bevel gear (91); the first bevel gear (55) meshes with the second bevel gear (91) to form a gear transmission; the second transmission shaft (9) is fixedly connected with a third bevel gear (92); one of the slag discharge wheels (71) is fixedly connected with a third transmission shaft (75); the third transmission shaft (75) is rotatably connected with the insulation furnace (2); the third transmission shaft (75) is fixedly connected with a fourth bevel gear (76); the third bevel gear (92) meshes with the fourth bevel gear (76) to form a gear transmission; the driving wheel (66) A fourth transmission shaft (615) is fixedly connected to the axis, the fourth transmission shaft (615) is rotationally connected to the insulation furnace (2), a fifth bevel gear (616) is fixedly connected to the fourth transmission shaft (615), a fifth transmission shaft (22) arranged horizontally is provided on the insulation furnace (2), a sixth bevel gear (23) is fixedly connected to the fifth transmission shaft (22), the fifth bevel gear (616) meshes with the sixth bevel gear (23) to form a gear transmission, one end of the fifth transmission shaft extends to the outside of the insulation furnace (2) and is fixedly connected to a seventh bevel gear (24), an eighth bevel gear (93) is fixedly connected to the second transmission shaft (9), the seventh bevel gear (24) meshes with the eighth bevel gear (93) to form a gear transmission.

9. An automatic aluminum melt refining system according to any one of claims 2 to 8, characterized in that: A rotating drum (56) is arranged on the bracket (51), and the rotating shaft (52) is rotatably connected to the rotating drum (56). A ventilation joint (57) is fixedly connected to the rotating drum (56). An annular groove is provided on the inner wall of the rotating drum (56). A ventilation hole (58) arranged along the axial direction of the rotating shaft (52) is provided on the rotating shaft (52). The ventilation hole (58) extends to the end of the rotating shaft (52) located at one end of the insulation furnace (2). An air inlet hole (59) is provided on the rotating shaft (52) at the position of the annular groove. The air inlet hole (59) penetrates into the ventilation hole (58) of the rotating shaft (52). The ventilation joint (57) is connected to the annular groove to transport the refined gas into the annular groove and pass it into the ventilation hole (58) of the rotating shaft (52).

10. An automatic refining method for aluminum melt, using an automatic refining system for aluminum melt as claimed in claim 8, characterized in that: Follow these steps: S1, placing an aluminum ingot into a melting furnace (1), heating and melting the aluminum ingot to form an aluminum melt, and conveying the liquid aluminum melt to a holding furnace (2) through a launder (4); S2, starting the driving motor (53) on the side wall bracket of the holding furnace (2), driving the rotating shaft (52) to rotate and stir the aluminum melt flowing into the holding furnace (2), and charging argon gas mixed with refining agent powder into the holding furnace (2) through the rotating shaft (52), and refining the aluminum melt by the argon gas and the refining agent powder; S3, the aluminum melt refined in the holding furnace (2) is continuously transported to the degassing box (3) through the flow channel (4), and the refined gas is transported to the degassing box (3) through the air inlet pipe to further refine the aluminum melt. The refined aluminum melt is continuously transported to the casting and rolling production line for casting and rolling into aluminum foil billets.

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