CN118080799A - Method for improving air bubbles of cast slab ingot - Google Patents
Method for improving air bubbles of cast slab ingot Download PDFInfo
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- CN118080799A CN118080799A CN202410231216.2A CN202410231216A CN118080799A CN 118080799 A CN118080799 A CN 118080799A CN 202410231216 A CN202410231216 A CN 202410231216A CN 118080799 A CN118080799 A CN 118080799A
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 98
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 96
- 238000001914 filtration Methods 0.000 claims abstract description 78
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 238000005266 casting Methods 0.000 claims abstract description 36
- 239000011261 inert gas Substances 0.000 claims abstract description 36
- 238000011049 filling Methods 0.000 claims abstract description 21
- 239000007789 gas Substances 0.000 claims abstract description 12
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 30
- 239000007788 liquid Substances 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 20
- 229910052786 argon Inorganic materials 0.000 claims description 15
- 238000005192 partition Methods 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 5
- 238000005273 aeration Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 2
- 230000005587 bubbling Effects 0.000 claims 6
- 230000000694 effects Effects 0.000 abstract description 14
- 230000006872 improvement Effects 0.000 abstract description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 14
- 239000001257 hydrogen Substances 0.000 description 14
- 229910052739 hydrogen Inorganic materials 0.000 description 14
- 238000003723 Smelting Methods 0.000 description 12
- 238000007872 degassing Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 12
- 238000005265 energy consumption Methods 0.000 description 7
- 239000011888 foil Substances 0.000 description 6
- 238000004321 preservation Methods 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/116—Refining the metal
- B22D11/117—Refining the metal by treating with gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/116—Refining the metal
- B22D11/119—Refining the metal by filtering
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for improving bubbles of a cast slab ingot, which is characterized in that an air inlet pipe and an air outlet pipe which are communicated with the inside of a filtering device are respectively arranged on the filtering device; during the period of waiting for the next aluminum water casting after the plate ingot casting is finished, introducing inert gas into the filtering device through an air inlet pipe; the filling pressure of the inert gas is 0.2-0.5Mpa, the first filling amount of the inert gas is larger than the air volume in the filtering device so as to completely discharge the air in the filtering device, and the filling flow is reduced to continuously fill after the first filling of the inert gas, so that the mouth of an air outlet pipe of the filtering device is enabled to feel gas overflow; the continuous inflation amount of the inert gas is not lower than 5L/min; and stopping charging the air into the filtering device when casting is carried out, and recovering charging when casting is finished. The invention has no aluminum water loss after improvement, and the front end of the prepared slab ingot has no bubbles, good quality and obvious effect.
Description
Technical Field
The invention relates to the technical field of aluminum alloy processing, in particular to a method for improving bubbles of a cast slab ingot.
Background
The electronic aluminum foil is a raw material of an aluminum electrolytic capacitor, high-purity aluminum with the aluminum purity of more than or equal to 99.99 percent is used as a raw material, a certain amount of trace elements are remelted and added in a smelting and standing heat preservation furnace, aluminum water in the smelting furnace is poured out after refining, degassing, deslagging, slag skimming and standing, the aluminum water passes through a launder, a degassing and deslagging device, a launder, a filtering device, a launder, a diverter plate, the aluminum water is uniformly distributed in each crystallizer, the aluminum water is cooled in the crystallizer and sequentially solidified and pulled out to form an aluminum plate ingot, the aluminum plate ingot is processed into the electronic aluminum optical foil through the processes of surface milling, soaking, hot rolling, cold rolling, foil rolling, finished product annealing and the like, and the aluminum optical foil is corroded, formed and striped to form an anode in the aluminum electrolytic capacitor.
In the remelting and casting process, because the temperature of the aluminum water is high (690-750 ℃), after the surface of the aluminum water contacts with air or a launder in the process of flowing out and casting in a furnace, water molecules in the air or the launder can be adsorbed, and then the water is decomposed into hydrogen in the aluminum water, so that the hydrogen content of the aluminum water is high. The ingot from which such bubbles are generated does not meet product quality requirements. In order to prevent the bubble phenomenon from generating in the aluminum plate ingot production process, the process requires that the aluminum water is refined in a smelting furnace by introducing high-purity argon, then a degassing and deslagging device is arranged between launders in the aluminum water outflow casting process, hydrogen and aluminum slag in the aluminum water are treated again, then the generated aluminum slag is filtered by a filtering device, the filtered clean aluminum water is cast into a plate ingot by a vertical casting machine, and the hydrogen content of the plate ingot produced by the process can be controlled within 0.090g/100 mlAl. The surface of the ingot with the hydrogen content of the degree does not generate bubbles in the soaking treatment process. However, in the actual production process, after soaking treatment, bubbles often appear on the head (i.e. the end where the ingot casting starts to solidify) of the ingot, the length of the ingot in the appearance area is about 1000mm, the ingot can only be cut off and scrapped, the normal head corner (250 mm) is removed, and the yield is about 1% -11% affected by the bubble cutting.
Disclosure of Invention
The invention solves the technical problems of bubble occurrence at the head of the slab ingot and low yield in the prior art, and provides a method for improving the bubble of the cast slab ingot.
In order to solve the problems, the invention adopts the following technical scheme:
a method for improving the bubble of cast slab ingot, there are air inlet pipe and air outlet pipe which communicate its inside separately on the filter unit; during the period of waiting for the next aluminum water casting after the plate ingot casting is finished, introducing inert gas into the filtering device through an air inlet pipe; the filling pressure of the inert gas is 0.2-0.5Mpa, the first filling amount of the inert gas is larger than the air volume in the filtering device so as to completely discharge the air in the filtering device, and the filling flow is reduced to continuously fill after the first filling of the inert gas, so that the mouth of an air outlet pipe of the filtering device is enabled to feel gas overflow; the continuous inflation amount of the inert gas is not lower than 5L/min; and stopping charging the air into the filtering device when casting is carried out, and recovering charging when casting is finished.
Further, the inert gas is argon.
Further, the argon purity is more than 99.99 percent
Further, the continuous inflation amount of the inert gas is 5L/min-10L/min.
Further, a heating pipe is arranged on the air inlet pipe.
Further, the filtering device comprises a filtering container body; a cover body is arranged at the top of the filter container body; a plurality of heating pipes are distributed in the cover body; the aluminum liquid inlet groove and the aluminum liquid outlet groove are respectively arranged on two opposite sides of the filtering container body, and a partition plate is arranged between the aluminum liquid inlet groove and the aluminum liquid outlet groove in the filtering container body; the partition board is not in contact with the bottom of the filter container body; a filter plate is arranged in the filter container body; one end of the filter plate is connected with the bottom of the partition plate, and the other end of the filter plate is fixedly connected with the inner side wall of the filtering container body and positioned below the aluminum liquid outlet groove; filter medium particles are arranged in the filter plate; the bottom of the filtering container body is provided with a heater.
Further, the air inlet pipe is arranged on the cover body, and the pipe orifice of the air inlet pipe is arranged above the filter plate and close to the partition plate; the air outlet pipe is also arranged on the cover body and is positioned between the air inlet pipe and the partition plate; the pipe orifice of the air outlet pipe is flush with the lower surface of the cover body; the mouth of the air inlet pipe is provided with an air charging cutter head, and the direction of the air charging cutter head is opposite to the air outlet pipe.
Further, thermocouples for measuring the temperature of the aluminum liquid and the temperature of the gas are respectively arranged in the filtering device.
Further, the air inlet pipe is respectively provided with a regulating valve, a pressure gauge and a flow meter; and the air outlet pipe is provided with a one-way valve.
Compared with the prior art, the invention has the following beneficial effects:
(1) The technical process of smelting and casting the electronic aluminum foil plate ingot comprises the following steps: the aluminum water in the smelting furnace is subjected to element addition, refining, degassing, deslagging, slag skimming and standing, then the aluminum water in the smelting furnace is poured out, passes through a launder, then passes through a degassing and deslagging device, then passes through a launder, then passes through a filtering device, then passes through a launder, then passes through a distribution plate, evenly distributes the aluminum water into 3-4 crystallizers, and is cooled in the crystallizers to be sequentially solidified and pulled out to form aluminum plate ingots. In actual production, the melting furnace needs about 6-15 hours for melting, element matching and refining primary molten aluminum, and then casting is carried out once. During the period of waiting for the completion of the smelting of the aluminum water of the next furnace, the launder needs to be kept at a certain temperature so as to prevent the launder from absorbing moisture due to the excessively low temperature, and the launder keeps the temperature by continuous heating due to the increased hydrogen content caused by the absorption of water when the aluminum water flows through again; also, the degassing and deslagging device and the filtering device are kept at sufficient temperatures, but because the two devices are a space with a volume of about 1 cubic meter, the process design requirements are that aluminum water be kept warm in the two devices in order to ensure the degassing, deslagging and filtering capabilities. It has been found that the surface of the degassing and deslagging device and the filtering device which remain in the molten aluminum during the next molten aluminum casting process can absorb moisture in the air, so that the hydrogen content of the molten aluminum is high. In the next furnace casting, the degassing and deslagging device can self-degas, the hydrogen content of the device can be controlled within the process range, but the filtering device at the back has no function, so that the retained aluminum water is kept high in hydrogen content and flows out into a crystallizer to be solidified at first, the head of a slab ingot, namely the part which starts to be solidified, is high in hydrogen content, and bubbles are formed in the subsequent step of homogenization treatment. In the invention, high-purity argon is filled into the upper surface of the aluminum water reserved in the filtering device to protect the aluminum water during the casting waiting period, and the contact with air is blocked, so that the rise of the hydrogen content is effectively prevented, and the occurrence of bubbles at the head of the ingot is effectively solved. Compared with the traditional method for discharging the aluminum water reserved in the filtering device, the method can reduce the aluminum water loss by 1-2 tons per heat, reduce the discharging working time by 30-60 minutes, and compared with the method for not filling inert gas during the casting waiting period, the method for preparing the plate ingot has the advantages of no bubbles at the head, high yield and remarkable effect.
(2) In the invention, during the casting waiting period, aluminum water in the filtering device needs to be insulated, however, the bottom of the filtering device is provided with a filtering plate with large thickness, filtering medium particles are arranged in the filtering plate, and the thick filtering medium particles influence heat transfer, so that the aluminum water is heated only by virtue of a heating pipe at the bottom, the aluminum water is not insulated sufficiently, and inert gas is heated by virtue of a heating pipe at the top and then transferred to the aluminum water for insulation. Under the condition, the temperature of the top of the filter device is higher than that of aluminum water, and the temperature difference exists because of the non-uniform temperature in the filter device, the gas can flow in the filter device, the top of the cover body is additionally arranged to heat the gas, the temperature in the filter device is higher than that outside the filter device, and cold air outside the filter device easily enters the filter device from a gap of the filter device, so that the air isolation effect is poor.
(3) In the invention, when aluminum water in the filtering device is heated and insulated, the heating pipes at the top and the bottom are required to be heated simultaneously to meet the insulated temperature requirement, during heating, the heating pipe at the top firstly heats inert gas and then transfers heat to the aluminum water, but the inert gas has poor heat conducting property, in the casting period, the height of the cover body from the aluminum liquid is about 20cm, the thickness of the inert gas after inflation is large, thus the heating effect on the aluminum water is poor, the air inlet pipe and the air outlet pipe are designed on the same side of the filtering device, the tool bit of the air inlet pipe is arranged opposite to the position of the air outlet pipe, the filled inert gas can form loop flow in the filtering device, the residence time is long, the heating effect on the inert gas is good, and the problem of poor heat conducting property of the inert gas can be overcome, so the design can heat and insulate the aluminum water well, the heat insulating effect of the filtering device is good, and the air outlet pipe is arranged right in front of the inflating tool bit, the gas flow path is short, the gas heating time is short, and the heat insulating effect is poor, and under the same condition, compared with the invention, the energy consumption of 8.0% -14.5%. When the air is in high flow, the air charging port and the air outlet are designed on the same side, and negative pressure is easily formed at the air outlet under the condition of high air flow, so that air reverse suction is easily caused, and the design of the air outlet pipe and the air inlet pipe tool bit and the flow speed of the air flow not only can solve the technical problems of poor heat conduction effect and poor heating and heat preservation effect of inert gas, but also can ensure that air reverse suction does not occur in the filter device, the effect of insulating aluminum water of the inert gas is good, no aluminum water loss is caused, the energy consumption is low, the front end of the prepared plate top is free of bubbles, the quality is good, and the effect is obvious.
Drawings
FIG. 1 is a schematic diagram of a smelting casting process of the present invention;
FIG. 2 is a schematic diagram of a filtering device according to the present invention;
FIG. 3 is a diagram of the product obtained in example 1 of the present invention;
fig. 4 is a diagram of a product obtained without filling the inside of the filtering device 3 with inert gas during waiting for casting;
1-smelting furnace, 2-degassing deslagging device, 3-filtering device, 4-flow distribution disc, 5-filtering container body, 6-cover body, 7-heating pipe, 8-air inlet pipe, 9-air outlet pipe, 10-aluminum liquid inlet groove, 11-aluminum liquid outlet groove, 12-baffle plate, 13-filter plate, 14-heater, 15-inflating knife head, 16-thermocouple, 17-regulating valve, 18-pressure gauge, 19-flow meter and 20-check valve.
Detailed Description
The invention is further illustrated by the following examples and experiments.
Example 1
In the prior art, the process of smelting and casting an electronic aluminum foil plate ingot is shown in fig. 1, and specifically comprises the following steps: the aluminum water in the smelting furnace 1 is subjected to element addition, refining, degassing, deslagging, slag skimming and standing, then the aluminum water in the smelting furnace 1 is poured out, passes through a launder, then passes through a degassing and deslagging device 2, then passes through a launder, then passes through a filtering device 3, then passes through a launder, then passes through a distribution plate 4, and is uniformly distributed into 3-4 crystallizers, and the aluminum water is cooled in the crystallizers to be sequentially solidified and pulled out to form aluminum plate ingots.
The method for improving bubbles of a cast slab ingot provided by the embodiment is improved on the basis of the structure and the process of the filtering device 3 in the process, wherein the structure of the filtering device 3 is shown in fig. 2, and the filtering device 3 comprises a filtering container body 5; a cover body 6 is arranged at the top of the filter container body; a plurality of heating pipes 7 are distributed in the cover body 6 and can heat inert gas filled in the filtering device 3; the air inlet pipe 8 is also provided with a heating pipe 7 which can heat the inert gas which is normally filled; the aluminum liquid inlet groove 10 and the aluminum liquid outlet groove 11 are respectively arranged on the two opposite sides of the filtering container body 5, and a baffle plate 12 is arranged between the aluminum liquid inlet groove 10 and the aluminum liquid outlet groove 11 in the filtering container body 5; the partition plate 12 is not in contact with the bottom of the filter container body 5; a filter plate 13 is arranged in the filter container body 5; one end of the filter plate 13 is connected with the bottom of the partition plate 12, and the other end is fixedly connected with the inner side wall of the filter container body 5 and positioned below the aluminum liquid outlet groove 11; filter medium particles are arranged in the filter plate 13 and can filter aluminum water; the bottom of the filtering container body 5 is provided with a heater 14 which can heat the aluminum water. The filter device 3 is respectively provided with an air inlet pipe 8 and an air outlet pipe 9 which are communicated with the inside of the filter device; specifically, the air inlet pipe 8 is arranged on the cover body 6, and the orifice of the air inlet pipe 8 is arranged above the filter plate 13 and close to the partition plate 12; the air outlet pipe 9 is also arranged on the cover body 6 and is positioned between the air inlet pipe 8 and the partition plate 12; the pipe orifice of the air outlet pipe 9 is flush with the lower surface of the cover body 6; the mouth of the air inlet pipe 8 is provided with an air charging cutter head 15, and the direction of the air charging cutter head 15 is opposite to the air outlet pipe 9. Under this embodiment, the gas that continuously fills can flow along the tool bit 15 that aerifys, and the mouth of pipe to outlet duct 9 is more backward, compares in setting up the outlet duct 9 and aerifys the tool bit 15 in the place ahead, and the inert gas that this embodiment fills flows the route that is longer in filter equipment, and the dwell time is long, and heating time is for a long time, therefore is better to inert gas to aluminium water heating heat preservation effect, can reduce heat loss more. Thermocouples 16 for measuring the temperature of the aluminum liquid and the temperature of the gas are respectively arranged in the filtering device 3, wherein the bottom of the thermocouple 16 for measuring the temperature of the aluminum liquid extends into the aluminum liquid, and the bottom of the thermocouple 16 for measuring the temperature of the gas is positioned above the aluminum liquid. The air inlet pipe 8 is respectively provided with a regulating valve 17 for regulating the inflation amount of inert gas, a pressure gauge 18 for detecting the inflation pressure and a flow meter 19; the air outlet pipe 9 is provided with a one-way valve 20 which can control the flow direction of air.
The method for specifically improving the bubble of the cast slab ingot in the embodiment comprises the following steps: according to the structure of the filtering device 3, argon is introduced into the filtering device 3 through an air inlet pipe 8 during the period of waiting for the next aluminum water casting after the plate ingot casting is completed; the argon filling pressure is 0.2-0.5Mpa, (the argon resource waste is easily caused by the excessive pressure, the air is not discharged cleanly due to the excessively low pressure), the first filling amount of argon is larger than the air volume in the filtering device 3 so as to completely discharge the air in the filtering device 3, and the filling flow is reduced to continuously fill after the first filling of the argon, so that the mouth of the air outlet pipe 9 of the filtering device 3 is provided with air to overflow; the continuous aeration amount of the argon is 5L/min-10L/min (the aeration amount flow rate is too high, the air is easy to suck back, the aeration amount flow rate is too low, the sufficient pressure in the filter device 3 is not ensured, and the air outside the filter device is easy to enter the filter device, so that the hydrogen content of aluminum water is increased); the air charging into the filter device 3 is stopped when casting is performed, and the air charging is resumed when casting is completed. Wherein the purity of the argon is more than 99.99%.
The structural improvement of this embodiment is that the air inlet pipe 8 and the air outlet pipe 9 and the positional relationship thereof are arranged in the existing filtering device 3, so in other embodiments, in the industry, the air inlet pipe 8 and the air outlet pipe 9 are arranged on other filtering devices 3 with aluminum water filtering functions according to the method of this example, and the air insulation and heat preservation of the aluminum water in the filtering device 3 can also be realized by inflating according to the inflation method of the present invention. In the process, the continuous inflation amount of argon is strictly controlled, the aluminum water can be well isolated from air, and meanwhile, the heat preservation effect is good, and the technical problems that the surface of the filtering device 3 which is reserved for the aluminum water adsorbs water in the air during the next casting process, so that the hydrogen content of the part of aluminum water is high, the part of aluminum water flows out firstly and enters a crystallizer to be solidified, the part of aluminum water which is solidified at the beginning of the head of a slab ingot is high in hydrogen content, bubbles are formed during the subsequent step of homogenization treatment, and the yield is affected are solved.
In this embodiment, during the waiting casting, the filtering device 3 with the volume of 1m 3 is filled with argon gas with the pressure of 0.2Mpa and the once filling amount of about 0.05 cubic meters, and then the small flow is changed to continuously fill air, so that the air in the gap at the outlet of the filtering device 3 overflows, the continuous filling amount is 5L/min, and the picture of the prepared slab ingot is shown in fig. 3. In the case where inert gas is not charged into the filtering device 3 during the waiting for casting, the cast slab is shown in fig. 4. The comparison of fig. 3 and fig. 4 shows that the invention can completely solve the problem of air bubbles at the head of the ingot, has high yield, avoids the waste of aluminum water and has obvious effect. In terms of energy consumption, it was found through experimental comparison that the energy consumption of the present embodiment was reduced by 8.2% during the waiting casting period compared with the mode in which the air outlet pipe was arranged right in front of the air charging head, and the energy consumption was reduced (here, the energy consumption refers to the electric energy consumption for heating the entire filtering device).
The foregoing description is directed to the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the invention, and all equivalent changes or modifications made under the technical spirit of the present invention should be construed to fall within the scope of the present invention.
Claims (9)
1. A method for improving bubbles of cast slab ingots, which is characterized in that an air inlet pipe (8) and an air outlet pipe (9) which are communicated with the inside of a filtering device (3) are respectively arranged on the filtering device; during the period of waiting for the next aluminum water casting after the plate ingot casting is finished, inert gas is introduced into the filter device (3) through an air inlet pipe (8); the filling pressure of the inert gas is 0.2-0.5Mpa, the first filling amount of the inert gas is larger than the air volume in the filtering device (3) so as to completely discharge the air in the filtering device (3), and the filling flow is reduced for continuous filling after the first filling of the inert gas, so that the mouth of an air outlet pipe (9) of the filtering device (3) is provided with air overflow; the continuous inflation amount of the inert gas is not lower than 5L/min; and stopping charging the air into the filtering device (3) when casting is carried out, and recovering charging when casting is finished.
2. A method of improving the bubbling of a cast slab ingot according to claim 1, wherein the inert gas is argon.
3. A method of improving bubbling of a cast slab ingot according to claim 2, wherein the argon purity is 99.99% or higher.
4. The method for improving the bubble of a cast slab ingot according to claim 1, wherein the continuous aeration amount of the inert gas is 5L/min to 10L/min.
5. A method of improving the bubbling of cast slab ingots according to claim 1, characterised in that the inlet pipe (8) is provided with a heating pipe.
6. A method of improving the bubbling of cast slab ingots according to claim 1, characterised in that the filtering device (3) comprises a filtering container body (5); a cover body (5) is arranged at the top of the filter container body; a plurality of heating pipes (7) are distributed in the cover body (5); the aluminum liquid inlet groove (10) and the aluminum liquid outlet groove (11) are respectively arranged on two opposite sides of the filtering container body (5), and a partition plate (12) is arranged between the aluminum liquid inlet groove (10) and the aluminum liquid outlet groove (11) in the filtering container body (5); the partition plate (12) is not in contact with the bottom of the filter container body; a filter plate (13) is arranged in the filter container body (5); one end of the filter plate (13) is connected with the bottom of the partition plate (12), and the other end of the filter plate is fixedly connected with the inner side wall of the filter container body (5) and positioned below the aluminum liquid outlet groove (11); filter medium particles are arranged in the filter plate (13); the bottom of the filtering container body (5) is provided with a heater (14).
7. A method of improving the bubbling of a cast ingot according to claim 6, characterized in that the inlet pipe (8) is provided on the cover (5) and the orifice of the inlet pipe (8) is provided above the filter plate (13) and adjacent to the partition plate (12); the air outlet pipe (9) is also arranged on the cover body (5) and is positioned between the air inlet pipe (8) and the partition plate (12); the pipe orifice of the air outlet pipe (9) is flush with the lower surface of the cover body (5); the mouth of the air inlet pipe (8) is provided with an air charging cutter head (15), and the direction of the air charging cutter head (15) is opposite to the air outlet pipe (9).
8. Method for improving the bubbling of cast slab ingots according to claim 7, characterised in that the filtering device (3) is provided with thermocouples (16) for measuring the aluminium liquid temperature and the gas temperature, respectively.
9. A method for improving air bubbles of a cast slab ingot according to claim 7, characterized in that the air inlet pipe (8) is respectively provided with a regulating valve (17), a pressure gauge (18) and a flow meter (19); the air outlet pipe (9) is provided with a one-way valve (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410231216.2A CN118080799B (en) | 2024-02-29 | 2024-02-29 | Method for improving air bubbles of cast slab ingot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410231216.2A CN118080799B (en) | 2024-02-29 | 2024-02-29 | Method for improving air bubbles of cast slab ingot |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118080799A true CN118080799A (en) | 2024-05-28 |
| CN118080799B CN118080799B (en) | 2024-08-30 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020121158A1 (en) * | 2000-04-07 | 2002-09-05 | Mitsuhiro Otaki | Continuous vacuum refining method of molten metal and apparatus thereof |
| US20040238148A1 (en) * | 2003-03-20 | 2004-12-02 | Yazaki Corporation | Apparatus for producing a composite material including ceramic hollow particles and aluminum or aluminum alloy and method for producing the composite material the same |
| CN101423900A (en) * | 2007-11-01 | 2009-05-06 | 山西闻喜银光镁业（集团）有限责任公司 | Magnesium alloy large-sized continual smelting system |
| CN101708546A (en) * | 2009-11-27 | 2010-05-19 | 山东南山铝业股份有限公司 | Casting process of aluminum alloy slab ingot |
| CN103173629A (en) * | 2011-12-23 | 2013-06-26 | 秦皇岛开发区美铝合金有限公司 | Aluminum alloy cleanliness treatment process special for hub forging |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020121158A1 (en) * | 2000-04-07 | 2002-09-05 | Mitsuhiro Otaki | Continuous vacuum refining method of molten metal and apparatus thereof |
| US20040238148A1 (en) * | 2003-03-20 | 2004-12-02 | Yazaki Corporation | Apparatus for producing a composite material including ceramic hollow particles and aluminum or aluminum alloy and method for producing the composite material the same |
| CN101423900A (en) * | 2007-11-01 | 2009-05-06 | 山西闻喜银光镁业（集团）有限责任公司 | Magnesium alloy large-sized continual smelting system |
| CN101708546A (en) * | 2009-11-27 | 2010-05-19 | 山东南山铝业股份有限公司 | Casting process of aluminum alloy slab ingot |
| CN103173629A (en) * | 2011-12-23 | 2013-06-26 | 秦皇岛开发区美铝合金有限公司 | Aluminum alloy cleanliness treatment process special for hub forging |
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