High-purity aluminum alloy liquid preparation equipment

Abstract

The invention discloses high-purity aluminum alloy liquid preparation equipment which comprises a smelting furnace, a first output pipe, a gas removing cylinder, a second output pipe, a heating crucible, a liquid outlet pipe and a casting mold which are sequentially arranged in a communicating mode. One end of the first output pipe extends into the filter box, a nitrogen input pipe is arranged on the heating crucible in a communicating mode, a nitrogen generator is arranged at the end, away from the heating crucible, of the nitrogen input pipe in a communicating mode, and a nitrogen input pump is arranged on the nitrogen input pipe. The method has the effect of improving the production quality of the aluminum alloy cast ingot.

Description

Technical Field

[0001] The present application relates to the technical field of metal smelting, and in particular to a device for preparing high-purity aluminum alloy liquid. Background Art

[0002] At present, when general enterprises produce cast aluminum alloy parts, they usually use purchased or self-made cast aluminum alloy ship-shaped ingots for remelting, and then use traditional casting methods such as sand molds and metal molds to fill the molten metal into the mold to obtain aluminum alloy parts with various shapes. However, this traditional casting method has low yield, serious chemical dust pollution, inconsistent quality control, difficult to control, and poor product performance.

[0003] Casting aluminum alloy ship-shaped ingots through traditional ship-shaped ingot molds does not require filtering and refining or the filtering and refining process is relatively simple, which will result in high gas and slag content inside the ship-shaped ingot, thereby reducing product quality.

[0004] Direct cooling semi-continuous casting is a casting process used to produce aluminum, copper and other metal materials. The outer side of the ingot is directly cooled by water, the solidification speed is fast, continuous production is possible, and there is little pollution. The deformed aluminum alloy ingots prepared by this method have the advantages of fine grains, low hydrogen content and slag content. However, the direct cooling semi-continuous method will produce cast aluminum alloy ingots, which will cause problems such as loose ingot core, high gas content and high slag content due to the high silicon content in the cast aluminum alloy. Summary of the invention

[0005] In order to improve the production quality of aluminum alloy ingots, the present application provides a high-purity aluminum alloy liquid preparation device.

[0006] The present application provides a high-purity aluminum alloy liquid preparation device adopts the following technical solution: A high-purity aluminum alloy liquid preparation device comprises a smelting furnace, a first output pipe, a degassing cylinder, a second output pipe, a heating crucible, a liquid outlet pipe and a casting mold which are connected in sequence, wherein a filter box is arranged in the degassing cylinder, a plurality of first filter holes are opened on the filter box, one end of the first output pipe extends into the filter box, a nitrogen input pipe is connected to the heating crucible, a nitrogen generator is connected to the nitrogen input pipe at one end away from the heating crucible, and a nitrogen input pump is arranged on the nitrogen input pipe.

[0007] By adopting the above technical solution, the raw metal block is melted in the smelting furnace, and the molten metal enters the filter box in the degassing cylinder through the first output pipe. The filter box performs preliminary filtration on the impurities in the molten metal, which helps to reduce the slag content in the finished product. The molten metal in the degassing cylinder enters the heating crucible for processing, and the molten metal flows into the casting mold through the liquid outlet pipe for casting. The nitrogen generated by the nitrogen generator enters the heating crucible, reducing the possibility of an oxide layer forming on the surface of the molten metal in the heating crucible. Through the mutual cooperation of the smelting furnace, the first output pipe, the degassing cylinder, the second output pipe, the heating crucible, the liquid outlet pipe and the casting mold, the production quality of the aluminum alloy ingot is improved.

[0008] Optionally, a slag cleaning assembly is provided on the degassing cylinder, and the slag cleaning assembly includes a rotating roller, a rotating chain belt, a slag collecting plate, a slag discharge inclined pipe and a slag collecting box. The lower end of the slag discharge inclined pipe is connected to the degassing cylinder, and the higher end of the slag discharge inclined pipe is connected to the slag collecting box. The rotating roller is rotatably connected to each other at both ends of the slag discharge inclined pipe in the length direction. The two rotating rollers are arranged in parallel. The rotating chain belt is jointly sleeved on the outside of the two rotating rollers. The slag discharge inclined pipe is provided with a driving member for driving the rotating roller to rotate. A plurality of slag collecting plates are arranged on the rotating chain belt along its width direction. A plurality of second filter holes are opened on the slag collecting plate, and the aperture size of the second filter hole is smaller than the aperture size of the first filter hole.

[0009] By adopting the above technical solution, some impurities with smaller diameter and lower density and the oxide layer on the surface of the molten metal float on the surface of the molten metal, the driving member drives the rotating roller to rotate, and the rotating chain plate belt rotates under the drive of the rotating roller, and several slag collecting plates connected thereto pass through the surface of the molten metal in turn, thereby achieving further removal of impurities and helping to further improve the quality of the metal ingot.

[0010] Optionally, a connecting pipe is provided between the bottom end of the slag discharge inclined pipe and the top end of the degassing cylinder, and a liquid level sensor is provided on the inner wall of the top end of the connecting pipe.

[0011] By adopting the above technical solution, the liquid level sensor detects the liquid level in the connecting pipe to ensure that the molten metal level can always submerge the top of the connecting pipe, so that the slag collecting plate can always contact the metal liquid surface during the slag cleaning process to achieve the slag salvage.

[0012] Optionally, a segregation assembly is provided on the heating crucible, and the segregation assembly includes a segregation spiral tube, a coolant input tube, a coolant output tube, a coolant input tube, a coolant input pump and a coolant storage tank. The segregation spiral tube is arranged in the heating crucible, one end of the segregation spiral tube is connected to the coolant output tube, and the other end is connected to the coolant input tube, one end of the coolant input tube away from the segregation spiral tube is connected to the coolant storage tank, and the coolant input pump is arranged on the coolant input tube.

[0013] By adopting the above technical solution, the coolant in the coolant storage tank enters the segregation spiral tube through the coolant inlet pipe. The low-temperature segregation spiral tube precipitates low-grade aluminum in the molten metal and adsorbs it on the segregation spiral tube, which helps to further improve the purity of the metal ingot.

[0014] Optionally, a smelting jacket is provided on the outer wall of the smelting furnace, a crucible jacket is provided on the outer wall of the heating crucible, a degassing jacket is provided on the outer wall of the degassing cylinder, a first gas pipe is provided between the smelting jacket and the crucible jacket, and a second gas pipe is provided between the smelting jacket and the degassing jacket.

[0015] By adopting the above technical solution, the preheat generated during the smelting process heats the air in the smelting jacket, and the hot air enters the crucible jacket and the degassing jacket through the first gas pipe and the second gas pipe, and the degassing cylinder is kept warm, thereby preventing the temperature of the molten metal from dropping rapidly in the degassing cylinder. The heating crucible is preheated, realizing the utilization of the preheating.

[0016] Optionally, the middle section of the nitrogen inlet pipe is spirally wound around the outside of the smelting jacket.

[0017] By adopting the above technical solution, the nitrogen inlet pipe is wound around the outside of the smelting jacket, and the generated nitrogen is preheated by the smelting jacket and injected into the heating crucible, which helps to reduce the temperature difference between the molten metal and the nitrogen, and avoid the formation of pores and cracks in the metal ingot due to excessive temperature difference.

[0018] Optionally, a vacuum exhaust pipe is connected to the slag discharge inclined pipe, and a vacuum pump is connected to one end of the vacuum exhaust pipe away from the slag discharge manifold.

[0019] By adopting the above technical solution, the vacuum pump forms a vacuum environment in the degassing cylinder through the vacuum exhaust pipe, so that the bubbles in the molten metal are extracted in the vacuum environment, which helps to reduce the number of pores in the product ingot.

[0020] Optionally, a vibration motor is provided on the degassing cylinder.

[0021] By adopting the above technical solution, when the metal liquid is vacuumed, the vibration motor is started, which makes it easier for the bubbles in the metal liquid to float up to the surface, which helps to further reduce the number of pores in the product.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. The mutual cooperation of the smelting furnace, the first output pipe, the degassing cylinder, the second output pipe, the heating crucible, the liquid outlet pipe and the casting mold has the effect of improving the production quality of the aluminum alloy ingot; 2. The segregation component separates low-purity aluminum, which helps to further improve the purity of the metal ingot; 3. The setting of the vibration motor facilitates the bubbles in the molten metal to float up to the surface, which helps to further reduce the number of pores in the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an embodiment of the present application for embodying a high-purity aluminum alloy liquid preparation device.

[0024] Figure 2 It is a partial cross-sectional view used to illustrate the slag cleaning component in the embodiment of the present application.

[0025] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0026] Figure 4 It is a partial cross-sectional view used to illustrate the internal structure of the heating crucible in the embodiment of the present application.

[0027] Explanation of reference numerals: 1. smelting furnace; 2. first output pipe; 3. degassing cylinder; 4. slag cleaning assembly; 41. slag cleaning motor; 42. rotating roller; 43. rotating chain plate belt; 44. slag collecting plate; 45. connecting pipe; 46. slag discharge inclined pipe; 47. slag collecting box; 5. second output pipe; 6. heating crucible; 7. liquid outlet pipe; 8. casting mold; 9. filter box; 10. discharge valve; 11. liquid level sensor; 12. first electric control valve; 13. second electric control valve; 14. vacuum exhaust pipe; 15. vacuum pump ; 16. Vibration motor; 17. Segregation assembly; 171. Segregation spiral tube; 172. Coolant input pipe; 173. Coolant output pipe; 174. Coolant storage tank; 175. Cooling cooler; 176. Coolant input pump; 18. Melting jacket; 19. Degassing jacket; 20. Crucible jacket; 21. First gas pipe; 22. Second gas pipe; 23. Electromagnetic stirring jacket; 24. Heating jacket; 25. Insulation layer; 26. Nitrogen input pipe; 27. Nitrogen input pump; 28. Nitrogen generator. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-4The present application is further described in detail. The present application provides a high-purity aluminum alloy liquid preparation device, which has the effect of improving the production quality of aluminum alloy ingots.

[0029] Reference Figure 1 and Figure 2 A high-purity aluminum alloy liquid preparation device includes a smelting furnace 1, a first output pipe 2, a degassing cylinder 3, a slag cleaning component 4, a second output pipe 5, a heating crucible 6, a liquid outlet pipe 7 and a casting mold 8 which are sequentially connected. A filter box 9 is arranged inside the degassing cylinder 3, and a plurality of first filter holes are opened on the filter box 9. One end of the first output pipe 2 extends into the degassing cylinder 3 and into the interior of the filter box 9.

[0030] Reference Figure 2 and Figure 3 The top of the degassing cylinder 3 is hemispherical, and a slag cleaning assembly 4 is arranged on the degassing cylinder 3. The slag cleaning assembly 4 includes a slag cleaning motor 41, a rotating roller 42, a rotating chain plate belt 43, a floating slag collecting plate 44, a connecting pipe 45, a slag discharge inclined pipe 46 and a slag collecting box 47. The connecting pipe 45 is vertically connected to the top of the degassing cylinder 3, and the top of the connecting pipe 45 is connected to the lower end of the inclined slag discharge inclined pipe 46. The end of the slag discharge inclined pipe 46 away from the connecting pipe 45 is connected to the slag collecting box 47. Two rotating rollers 42 are rotatably connected at both ends of the slag discharge inclined pipe 46 in the length direction, and the two rotating rollers 42 are arranged in parallel. The slag cleaning motor 41 is arranged on the slag discharge inclined pipe 46, and the output shaft of the slag cleaning motor 41 is drivingly connected to one of the rotating rollers 42. The rotating chain plate belt 43 is sleeved on the outside of the two rotating rollers 42, and a plurality of slag collecting plates 44 are connected at equal intervals on the outside of the rotating chain plate belt 43, and the slag collecting plates 44 are arranged along the width direction of the rotating chain plate belt 43. The slag collecting plate 44 is provided with a plurality of second filter holes, and the diameter of the second filter holes is smaller than the diameter of the first filter holes. A liquid level sensor 11 is arranged on the inner wall of the top of the connecting pipe 45. A first electric control valve 12 is arranged on the first output pipe 2, and a second electric control valve 13 is arranged on the second output pipe 5. A vacuum exhaust pipe 14 is connected to the slag discharge inclined pipe 46, and a vacuum pump 15 is arranged at one end of the vacuum exhaust pipe 14 away from the slag discharge inclined pipe 46. A vibration motor 16 is arranged on the bottom surface of the degassing cylinder 3.

[0031] Reference Figure 2 and Figure 4The heating crucible 6 is provided with a segregation assembly 17, which includes a segregation spiral tube 171, a coolant input tube 172, a coolant output tube 173, a segregation spiral tube 171, a coolant storage tank 174, a cooling cooler 175, and a coolant input pump 176. The segregation spiral tube 171 is provided in the heating crucible 6, the coolant input tube 172 is connected to one end of the segregation spiral tube 171, and the coolant output tube 173 is connected to the other end of the segregation spiral tube 171. The end of the coolant input tube 172 away from the segregation spiral tube 171 is connected to the coolant storage tank 174, the coolant input pump 176 is provided on the coolant input tube 172, the coolant output tube 173 is connected to the coolant storage tank 174, and the cooling cooler 175 is provided on the coolant output tube 173.

[0032] Referring to the figure, a crucible jacket 20 is provided on the outer wall of the heating crucible 6, a smelting jacket 18 is provided on the outer ring wall of the smelting furnace 1, and a degassing jacket 19 is provided on the outer ring wall of the degassing cylinder 3. A first gas delivery pipe 21 is provided between the smelting jacket 18 and the crucible jacket 20, and a second gas delivery pipe 22 is provided between the degassing jacket 19 and the smelting jacket 18. An electromagnetic stirring jacket 23 is provided outside the crucible jacket 20, a heating jacket 24 is provided outside the electromagnetic stirring jacket 23, and an insulation layer 25 is provided outside the heating jacket 24. A nitrogen inlet pipe 26 is connected to the top of the heating crucible 6, a nitrogen inlet pump 27 is provided on the nitrogen inlet pipe 26, and a nitrogen generator 28 is provided at one end of the nitrogen inlet pipe 26 away from the heating crucible 6. The middle section of the nitrogen inlet pipe 26 is wound around the outside of the smelting jacket 18.

[0033] Reference Figure 4 The liquid outlet pipe 7 is connected to the bottom end of the heating crucible 6, and a discharge valve 10 is arranged on the liquid outlet pipe 7. A casting hole is opened on the casting mold 8, and the liquid outlet pipe 7 extends into the interior of the casting mold 8 through the casting hole.

[0034] Reference Figure 1 and Figure 2 When processing the aluminum ingot, the raw metal block is placed in the smelting furnace 1 for preliminary melting, and the first electrically controlled valve 12 is opened to inject the molten metal in the smelting furnace 1 into the degassing cylinder 3 through the first output pipe 2. The molten metal is primarily filtered through the filter box 9 to filter out impurities with larger diameters in the molten metal, which helps to reduce the slag content in the finished product. The vacuum pump 15 is started, and the vacuum pump 15 forms a negative pressure environment in the degassing cylinder 3 through the vacuum exhaust pipe 14, and the bubbles in the molten metal float and are discharged in the vacuum environment. At the same time, the vibration motor 16 is started, which helps to discharge the bubbles in the molten metal faster.

[0035] Reference Figure 2 and Figure 3, some residues with smaller diameters and metal oxides float on the surface of the molten metal, the slag cleaning motor 41 starts to drive the rotating roller 42 and the rotating chain plate belt 43 to rotate, and the slag collecting plate 44 passes through the surface of the molten metal in turn, removes the remaining slag and transports it to the slag collecting box 47 for temporary storage. The liquid level sensor 11 detects the liquid level in the connecting pipe 45 in real time to ensure that the molten metal is always higher than the top of the connecting pipe 45, so that the slag collecting plate 44 can contact the surface of the molten metal.

[0036] Reference Figure 2 and Figure 4 , open the second electric control valve 13, and the molten metal after exhaust and filtration and slag removal is injected into the heating crucible 6 through the second output pipe 5. The electromagnetic stirring sleeve 23 is started, and the molten metal in the heating crucible 6 starts to rotate through electromagnetic induction, and the heating sleeve 24 heats the molten metal. The coolant input pump 176 is started, and the coolant in the coolant storage tank 174 enters the segregation spiral tube 171 through the coolant input pipe 172. The segregation spiral tube 171 with a lower temperature precipitates low-grade aluminum in the heating crucible 6, and the low-grade aluminum is adsorbed on the segregation spiral tube 171, which helps to improve the production quality of the finished metal ingot. The coolant after heat exchange flows into the cooling cooler 175 through the coolant output pipe 173 for cooling, and the cooled coolant flows back to the coolant storage tank 174 for reuse.

[0037] Reference Figure 1 and Figure 4 , open the discharge valve 10, and the metal liquid purified by segregation treatment is injected into the casting mold 8 through the liquid outlet pipe 7 for casting. The nitrogen generator 28 generates nitrogen and transmits it into the heating crucible 6 through the nitrogen input pipe 26, which reduces the possibility of the metal liquid in the heating crucible 6 generating oxides.

[0038] The implementation principle of a high-purity aluminum alloy liquid preparation device in the embodiment of the present application is as follows: a raw metal block is placed in a smelting furnace 1 for melting, and the molten metal is filtered through a filter box 9. A vacuum pump 15 forms a negative pressure environment in a degassing cylinder 3, and bubbles in the molten metal float and are discharged in the vacuum environment. A slag removal component 4 removes slag on the surface of the molten metal.

[0039] The molten metal after exhaust and filtration is injected into the heating crucible 6. The low-temperature segregation spiral tube 171 precipitates low-grade aluminum in the heating crucible 6. The aluminum liquid purified by segregation treatment is injected into the casting mold 8 through the liquid outlet pipe 7 for casting. Nitrogen is introduced into the heating crucible 6 to reduce the possibility of the molten metal in the heating crucible 6 generating oxides.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-purity aluminum alloy liquid preparation device, characterized in that: The invention comprises a smelting furnace (1), a first output pipe (2), a degassing cylinder (3), a second output pipe (5), a heating crucible (6), a liquid outlet pipe (7) and a casting mold (8) which are connected in sequence. A filter box (9) is arranged in the degassing cylinder (3). A plurality of first filter holes are provided on the filter box (9). One end of the first output pipe (2) extends into the filter box (9). A nitrogen input pipe (26) is connected to the heating crucible (6). A nitrogen generator (28) is connected to the nitrogen input pipe (26) at one end away from the heating crucible (6). A nitrogen input pump (27) is provided on the nitrogen input pipe (26).

2. The high-purity aluminum alloy liquid preparation equipment according to claim 1, characterized in that: The degassing cylinder (3) is provided with a slag cleaning component (4), and the slag cleaning component (4) comprises a rotating roller (42), a rotating chain plate belt (43), a floating slag collecting plate (44), a slag discharge inclined pipe (46) and a slag collecting box (47). The lower end of the slag discharge inclined pipe (46) is connected to the degassing cylinder (3), and the upper end of the slag discharge inclined pipe (46) is connected to the slag collecting box (47). The rotating roller (42) is rotatably connected to both ends of the slag discharge inclined pipe (46) in the length direction. A plurality of slag collecting plates (44) are provided on the rotating chain plate belt (43) along the width direction thereof, and a plurality of second filter holes are provided on the slag collecting plates (44), and the aperture of the second filter holes is smaller than the aperture of the first filter holes.

3. The high-purity aluminum alloy liquid preparation equipment according to claim 2, characterized in that: A connecting pipe (45) is provided between the bottom end of the slag discharge inclined pipe (46) and the top end of the degassing cylinder (3), and a liquid level sensor (11) is provided on the inner wall of the top end of the connecting pipe (45).

4. The high-purity aluminum alloy liquid preparation equipment according to claim 1, characterized in that: The heating crucible (6) is provided with a segregation component (17), the segregation component (17) comprising a segregation spiral tube (171), a coolant input tube (172), a coolant output tube (173), a coolant input tube (172), a coolant input pump (176) and a coolant storage tank (174), the segregation spiral tube (171) is arranged in the heating crucible (6), one end of the segregation spiral tube (171) is connected to the coolant output tube (173), and the other end is connected to the coolant input tube (172), the end of the coolant input tube (172) away from the segregation spiral tube (171) is connected to the coolant storage tank (174), and the coolant input pump (176) is arranged on the coolant input tube (172).

5. The high-purity aluminum alloy liquid preparation equipment according to claim 1, characterized in that: A smelting jacket (18) is arranged on the outer wall of the smelting furnace (1), a crucible jacket (20) is arranged on the outer wall of the heating crucible (6), a degassing jacket (19) is arranged on the outer wall of the degassing cylinder (3), a first gas supply pipe (21) is arranged in communication between the smelting jacket (18) and the crucible jacket (20), and a second gas supply pipe (22) is arranged in communication between the smelting jacket (18) and the degassing jacket (19).

6. The high-purity aluminum alloy liquid preparation equipment according to claim 5, characterized in that: The middle section of the nitrogen inlet pipe (26) is spirally wound around the outside of the smelting jacket (18).

7. The high-purity aluminum alloy liquid preparation equipment according to claim 3, characterized in that: The slag discharge inclined pipe (46) is connected to a vacuum exhaust pipe (14), and one end of the vacuum exhaust pipe (14) away from the slag discharge inclined pipe (46) is connected to a vacuum pump (15).

8. The high-purity aluminum alloy liquid preparation equipment according to claim 7, characterized in that: The degassing cylinder (3) is provided with a vibration motor (16).

Images