CN113332769A - Self-deslagging tubular filter for metal melt and working method thereof - Google Patents
Self-deslagging tubular filter for metal melt and working method thereof Download PDFInfo
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- CN113332769A CN113332769A CN202110674068.8A CN202110674068A CN113332769A CN 113332769 A CN113332769 A CN 113332769A CN 202110674068 A CN202110674068 A CN 202110674068A CN 113332769 A CN113332769 A CN 113332769A
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 67
- 239000002184 metal Substances 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000919 ceramic Substances 0.000 claims abstract description 61
- 238000007664 blowing Methods 0.000 claims abstract description 26
- 238000005192 partition Methods 0.000 claims abstract description 24
- 239000012535 impurity Substances 0.000 claims abstract description 20
- 238000009423 ventilation Methods 0.000 claims abstract description 19
- 238000001914 filtration Methods 0.000 claims abstract description 16
- 238000007872 degassing Methods 0.000 claims abstract description 13
- 239000002893 slag Substances 0.000 claims description 21
- 229910052782 aluminium Inorganic materials 0.000 claims description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 20
- 239000000155 melt Substances 0.000 claims description 14
- 238000010079 rubber tapping Methods 0.000 claims description 10
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000007667 floating Methods 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 abstract description 16
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 16
- 239000007789 gas Substances 0.000 abstract description 4
- 125000004435 hydrogen atom Chemical class [H]* 0.000 abstract 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 14
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 238000003723 Smelting Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/31—Self-supporting filtering elements
- B01D29/33—Self-supporting filtering elements arranged for inward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/52—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/001—Filters in combination with devices for the removal of gas, air purge systems
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/06—Obtaining aluminium refining
- C22B21/066—Treatment of circulating aluminium, e.g. by filtration
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a self-deslagging tubular filter for metal melt, which comprises a closed filter box; the two ends of the filter box are provided with a metal melt inlet and a metal melt outlet which are sequentially communicated with an external launder from front to back along the flow direction of the metal melt; the interior of the filter box is divided into a filter chamber at the upper part and a underflow chamber at the lower part by a partition plate; the metal melt inlet is communicated with the filtering chamber; the metal melt outlet is communicated with the undercurrent chamber; a plurality of ceramic filter pipes are arranged on the partition board at intervals; the through hole at the bottom of the ceramic filter pipe is communicated with the undercurrent chamber; a ventilation plug is arranged in the through hole; the air-permeable plug is communicated with an air inlet pipe communicated with the outside; the top of the ceramic filter pipe is communicated with an exhaust pipe communicated with the outside through a valve; the top of the filtering box is provided with a slag-off opening. The invention removes impurities adsorbed on the surface of the ceramic filter tube by gas blowing in the filtering process and the finishing stage, and takes away hydrogen, thereby achieving the purpose of degassing.
Description
Technical Field
The invention relates to the technical field of aluminum melt smelting, in particular to a self-deslagging tubular filter for a metal melt.
Background
Improving the purity of the aluminum melt becomes a very key means for producing high-quality and high-performance advanced aluminum materials. Aluminum and its alloys are among the most contaminated alloys with inclusions and hydrogen, and their purity greatly affects the quality of the metal. The purity of aluminum is mainly determined by dissolved hydrogen and non-metallic inclusions, the hydrogen is the only gas dissolved in the aluminum melt in large quantity, and the solubility of the hydrogen in the aluminum liquid phase and the solid phase is 0.65ml/100gAl and 0.034ml/100gAl respectively, and the difference is about 19.1 times. The inclusions in the aluminum melt are mainly formed by the reaction of aluminum and oxygen in the melting process except for the water vapor reaction and the furnace burden, so that hydrogen and the inclusions are inevitably present when the metal aluminum is melted into a liquid state. Therefore, the aluminum melt must be subjected to purification treatment such as degassing and filtering before casting, otherwise, the produced aluminum material has poor mechanical properties, and has defects such as surface defects, pores and cracks, and the like, so that the development of application of the high-performance aluminum alloy material is restricted.
The filter equipment on the existing market has higher material consumption, high filtering cost and poor slag removal effect.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the self-deslagging tubular filter for the metal melt and the preparation method thereof, wherein the self-deslagging tubular filter has low cost and good deslagging and dehydrogenation effects.
The invention is realized by the following modes: a can arrange sediment tubular filter certainly for metal melt, including the airtight filter box; the two ends of the filter box are provided with a metal melt inlet and a metal melt outlet which are sequentially communicated with an external launder from front to back along the flow direction of the metal melt; the interior of the filter box is divided into a filter chamber at the upper part and a underflow chamber at the lower part by a partition plate; the metal melt inlet is communicated with the filtering chamber; the metal melt outlet is communicated with the undercurrent chamber; a plurality of ceramic filter pipes are arranged on the partition board at intervals; the through hole at the bottom of the ceramic filter pipe is communicated with the undercurrent chamber; a ventilation plug is arranged in the through hole; the air-permeable plug is communicated with an air inlet pipe communicated with the outside; the top of the ceramic filter pipe is communicated with an exhaust pipe communicated with the outside through a valve; and a slag removing port is arranged on the filter box.
Furthermore, the partition plates comprise transverse partition plates and longitudinal partition plates, wherein the transverse partition plates divide the filter box into an upper part and a lower part, and the tail ends of the transverse partition plates extend upwards for sealing; the length of the transverse partition plate is smaller than that of the filter box.
Further, the metal melt outlet and the metal melt inlet are positioned on the same horizontal plane.
Furthermore, the ceramic filter pipe is a ceramic filter pipe.
Furthermore, the top of the ceramic filter pipe extends out of the top of the filter box and then is communicated with an exhaust pipe communicated with the outside through a valve.
Furthermore, the bottom of the ventilation plug is fixedly arranged at the bottom of the filter box, and the top of the ventilation plug is arranged in the middle of the through hole and is not contacted with the inner wall of the ceramic filter tube.
Further, the bottom of the underflow chamber is arranged downwards along the flow direction of the molten metal; the lowest part of the underflow chamber is provided with a discharge port.
Furthermore, the slag removing openings are respectively arranged at the upper part and the lower part of the filter chamber.
A working method of a self-slagging tubular filter for metal melt comprises the following steps:
s1: the metal melt enters a filter chamber through a metal melt inlet, the metal melt passes through micropores on the surface of a ceramic filter pipe arranged in the filter chamber to screen impurities in the metal melt, and the pure melt enters the ceramic filter pipe through the micropores and then flows into a undercurrent chamber through a through hole;
s2: after the aluminum liquid passes through the filter box for 30 minutes, or when the flow rate of the aluminum liquid is lower than the casting amount, manually starting to exhaust; controlling the blowing frequency of the air inlet pipe and the vent plug through the PLC; closing a valve at the top of the ceramic filter tube, sequentially opening a ventilation plug to blow air into the ceramic filter tube, discharging the melt in the ceramic filter tube from inside to outside through the air blowing, taking away impurities adsorbed on micropores on the surface of the ceramic filter tube during discharging, floating the impurities to the surface of the melt through the air, and taking away the impurities in the melt through a deslagging port;
s3: sequentially opening valves at the tops of the ceramic filter pipes under the control of a PLC (programmable logic controller), and recovering pressure in the ceramic filter pipes to ensure that the metal melt normally enters the undercurrent chamber through micropores on the surfaces of the ceramic filter pipes;
s4: repeating the steps S2 and S3 for a plurality of times until the filtration is finished, and rapidly blowing off impurities on the surface of the ceramic filter tube by high-purity argon through micropores on the surface of the ceramic filter tube by controlling the degassing pressure of the ventilation plug, and then cleaning the ceramic filter tube through a deslagging port;
s5: and opening the discharging port to normally drain the melt in the box body.
Further, in the step S2, the air-blowing frequency of the air-permeable plug is 1 time/30 minutes for 10 seconds, and the air-blowing pressure is 0.25 to 0.4 Mpa.
Further, in the step S4, the air-blowing frequency of the air-permeable plug is 1 time/30 minutes for 10 seconds, and the air-blowing pressure is 0.25 to 0.4 Mpa.
The invention has the beneficial effects that: impurities adsorbed on the surface of the ceramic filter pipe are removed through gas blowing in the filtering process and the finishing stage, so that the labor intensity is effectively reduced, and the service life of the ceramic filter pipe can be prolonged.
And a ventilation plug is added for blowing in the filtering process, the blown high-purity argon forms dispersed small bubbles through the ventilation plug, and the small air bags can be brought out with hydrogen in the melt. Effectively reduces the hydrogen content of the metal melt and achieves the aim of degassing.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic view of the filter of the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings. It is to be understood that the described embodiments are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "provided," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.
Example (b):
as shown in FIG. 1, a self-tapping tubular filter for molten metal comprises a sealed filter box 1; the two ends of the filter box 1 are provided with a metal melt inlet 2 and a metal melt outlet 3 which are sequentially communicated with an external launder from front to back along the flow direction of the metal melt; the interior of the filter box 1 is divided into a filter chamber 5 at the upper part and a underflow chamber 6 at the lower part by a partition plate 4; the metal melt inlet 2 is communicated with a filter chamber 5; the metal melt outlet 3 is communicated with the undercurrent chamber 6; a plurality of ceramic filter pipes 7 are arranged on the partition plate 4 at intervals; the through hole 8 at the bottom of the ceramic filter pipe 7 is communicated with the undercurrent chamber 6; a ventilation plug 9 is arranged in the through hole 8; the vent plug 9 is communicated with an air inlet pipe 10 communicated with the outside; the top of the ceramic filter pipe 7 is communicated with an exhaust pipe 12 communicated with the outside through a valve 11; the top of the filter box 1 is provided with a slag-off opening 13.
In an embodiment of the present invention, the partition plate 4 includes a transverse partition plate 41 dividing the filter tank 1 into an upper part and a lower part, and a longitudinal partition plate 42 extending upward from the end of the transverse partition plate 41 for sealing; the length of the transverse partition plate 41 is smaller than that of the filter box 1.
In one embodiment of the invention, the molten metal outlet 3 is located at the same level as the molten metal inlet 2.
In an embodiment of the present invention, the ceramic filter tube 7 is a ceramic filter tube.
In one embodiment of the present invention, the top of the ceramic filtering pipe 7 extends out of the top of the filtering box 1 and is communicated with an exhaust pipe 12 communicated with the outside through a valve 11.
In one embodiment of the invention, the bottom of the vent plug 9 is fixedly arranged at the bottom of the filter box 1, and the top of the vent plug is arranged in the middle of the through hole 8 and is not contacted with the inner wall of the ceramic filter pipe 7.
In one embodiment of the invention, the bottom of the underflow chamber 6 is arranged to be inclined downwards along the flow direction of the molten metal; the lowest part of the underflow chamber 6 is provided with a discharge opening 14.
In one embodiment of the invention, the slag removing opening 13 is arranged at the upper part and the lower part of the filter chamber 5 respectively.
A working method of a self-slagging tubular filter for metal melt comprises the following steps:
s1: metal melt enters a filter chamber 5 through a metal melt inlet 2, the metal melt passes through micropores on the surface of a ceramic filter pipe 7 arranged in the filter chamber 5 to screen impurities in the metal melt, and the pure melt enters the ceramic filter pipe 7 through the micropores and then flows into a undercurrent chamber 6 through a through hole 8;
s2: after the aluminum liquid passes through the filter box for 30 minutes, or when the flow rate of the aluminum liquid is lower than the casting amount, manually starting to exhaust; controlling the blowing frequency of the air inlet pipe 10 and the vent plug 9 through the PLC; closing a valve 11 at the top of the ceramic filter pipe 7, sequentially opening a ventilation plug 9 to blow air into the ceramic filter pipe 7, discharging the melt in the ceramic filter pipe 7 from inside to outside through the air blowing, taking away impurities adsorbed on micropores on the surface of the ceramic filter pipe 7 during discharging, floating the impurities to the surface of the melt through the air, and removing the impurities in the melt through a slag removing port 13;
s3: sequentially opening a valve 11 at the top of the ceramic filter pipe 7 under the control of a PLC (programmable logic controller), and recovering the pressure in the ceramic filter pipe 7 so that the metal melt normally enters the undercurrent chamber through micropores on the surface of the ceramic filter pipe 7;
s4: repeating the steps S2 and S3 for a plurality of times until the filtration is finished, and rapidly blowing off impurities on the surface of the ceramic filter tube 7 by high-purity argon through micropores on the surface of the ceramic filter tube 7 by controlling the degassing pressure of the ventilation plug 9, and then cleaning the impurities through a deslagging port;
s5: and opening the discharging port 14 to normally empty the melt in the box body.
Further, in the step S2, the air-blowing frequency of the air-permeable plug 9 is 1 time/30 minutes for 10 seconds, and the air-blowing pressure is 0.25 Mpa.
Further, in the step S4, the air-blowing frequency of the air-permeable plug 9 is 1 time/30 minutes for 10 seconds, and the air-blowing pressure is 0.25 Mpa.
Experimental example 1:
the 5052 aluminum alloy slab ingot is cast, wherein the online degassing and purifying equipment comprises a double-rotor online degassing machine and a self-deslagging tubular filter.
5052 aluminum alloy in the smelting furnace, Si0.102%, Fe0.290%, Cu0.024%, Mn0.059%, 2.5%, Cr0.18%, Zn0.02%, Ti 0.028%, and the balance of aluminum and inevitable impurities.
Measuring the slag content of 2/kg (0.68 mm) and the hydrogen content of 0.262ml/100gAl (0.262 ml/100 gAl) by using an off-line slag measuring instrument in the converter flow; measuring the slag content of 2/kg with the slag content of 0.52mm and the hydrogen content of 0.11ml/100gAl off line between the double-rotor degassing machine and the self-slagging tubular filter; the slag content of 2/kg with the slag content of 0.011mm and the hydrogen content of 0.099ml/100gAl are measured by an off-line slag detector after the self-slagging tubular filter;
experimental example 2:
casting a 3003 aluminum alloy slab ingot, wherein the online degassing and purifying equipment comprises a dual-rotor online degassing machine and a self-deslagging tubular filter.
3003 aluminum alloy, Si0.102%, Fe0.450%, Cu0.074%, Mn1.06%, Mg0.02%, Cr0.003%, Zn0.02%, Ti 0.018%, and the balance of aluminum and inevitable impurities in the smelting furnace.
Measuring the slag content of 0.65mm2/kg and the hydrogen content of 0.271ml/100gAl by using an off-line slag measuring instrument in the flow of the converter; measuring the slag content of 0.51mm2/kg and the hydrogen content of 0.108ml/100gAl in an off-line manner between the double-rotor degassing machine and the self-slagging tubular filter; the slag content of 2/kg with the slag content of 0.011mm and the hydrogen content of 0.095ml/100gAl are measured by an off-line slag detector after the self-slagging tubular filter.
The invention removes impurities adsorbed on the surface of the ceramic filter tube by gas blowing in the filtering process and the finishing stage, thereby effectively reducing the labor intensity and simultaneously prolonging the service life of the ceramic filter tube.
And a ventilation plug is added for blowing in the filtering process, the blown high-purity argon forms dispersed small bubbles through the ventilation plug, and the small air bags can be brought out with hydrogen in the melt. Effectively reduces the hydrogen content of the metal melt and achieves the aim of degassing.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A can arrange sediment tubular filter certainly for metal melt which characterized in that: comprises a closed filter box (1); both ends of the filter box (1) are provided with a metal melt inlet (2) and a metal melt outlet (3) which are sequentially communicated with an external launder from front to back along the flow direction of the metal melt; the interior of the filter box (1) is divided into a filter chamber (5) positioned at the upper part and a latent flow chamber (6) positioned at the lower part by a partition plate (4); the metal melt inlet (2) is communicated with the filtering chamber (5); the metal melt outlet (3) is communicated with the undercurrent chamber (6); a plurality of ceramic filter pipes (7) are arranged on the partition plate (4) at intervals; the through hole (8) at the bottom of the ceramic filter pipe (7) is communicated with the undercurrent chamber (6); a ventilation plug (9) is arranged in the through hole (8); the ventilation plug (9) is communicated with an air inlet pipe (10) communicated with the outside; the top of the ceramic filter pipe (7) is communicated with an exhaust pipe (12) communicated with the outside through a valve (11); the filter box (1) is provided with a slag-off opening (13).
2. A self-tapping candle filter for molten metal according to claim 1, wherein: the partition plate (4) comprises a transverse partition plate (41) which divides the filter box (1) into an upper part and a lower part and a longitudinal partition plate (42) which extends upwards and seals the tail end of the transverse partition plate (41); the length of the transverse partition plate (41) is less than that of the filter box (1).
3. A self-tapping candle filter for molten metal according to claim 1, wherein: the metal melt outlet (3) and the metal melt inlet (2) are positioned on the same horizontal plane.
4. A self-tapping candle filter for molten metal according to claim 1, wherein: the top of the ceramic filter pipe (7) extends out of the top of the filter box (1) and then is communicated with an exhaust pipe (12) communicated with the outside through a valve (11).
5. A self-tapping candle filter for molten metal according to claim 1, wherein: the bottom of the ventilation plug (9) is fixedly arranged at the bottom of the filter box (1), and the top of the ventilation plug is arranged in the middle of the through hole (8) and is not contacted with the inner wall of the ceramic filter pipe (7).
6. A self-tapping candle filter for molten metal according to claim 1, wherein: the bottom of the underflow chamber (6) is arranged downwards along the flow direction of the molten metal; the lowest part of the underflow chamber (6) is provided with a discharge opening (14).
7. A self-tapping candle filter for molten metal according to claim 1, wherein: the slag removing openings (13) are respectively arranged at the upper part and the lower part of the filter chamber (5).
8. A method of operating a self-tapping candle filter for molten metal according to any one of claims 1 to 7, characterized in that: the method comprises the following steps:
s1: metal melt enters a filter chamber (5) through a metal melt inlet (2), the metal melt passes through micropores on the surface of a ceramic filter pipe (7) arranged in the filter chamber (5) to screen impurities in the metal melt, and the pure melt enters the ceramic filter pipe (7) through the micropores and then flows into a undercurrent chamber (6) through a through hole (8);
s2: after the aluminum liquid passes through the filter box for 30 minutes, or when the flow rate of the aluminum liquid is lower than the casting amount, manually starting to exhaust; the air blowing frequency of the air inlet pipe (10) and the air vent plug (9) is controlled by the PLC; closing a valve (11) at the top of the ceramic filter pipe (7), sequentially opening a ventilation plug (9) to blow air into the ceramic filter pipe (7), discharging a melt in the ceramic filter pipe (7) from inside to outside through the blowing air, taking away impurities adsorbed on micropores on the surface of the ceramic filter pipe (7) during discharging, floating up to the surface of the melt through the air, and removing the impurities in the melt through a slag removing port (13);
s3: sequentially opening a valve (11) at the top of the ceramic filter pipe (7) under the control of a PLC (programmable logic controller), and recovering the pressure in the ceramic filter pipe (7) to ensure that the metal melt normally enters the undercurrent chamber through micropores on the surface of the ceramic filter pipe (7);
s4: repeating the steps S2 and S3 for a plurality of times until the filtration is finished, and rapidly blowing off impurities on the surface of the ceramic filter tube (7) by high-purity argon through micropores on the surface of the ceramic filter tube (7) by controlling the degassing pressure of the ventilation plug (9), and then cleaning through a slag removal port (13);
s5: and opening the discharge port (14) to normally discharge the melt in the box body.
9. The method of claim 8, wherein the filter comprises a self-tapping tubular filter for molten metal, and the method comprises the steps of: in the step S2, the air blowing frequency of the air vent plug (9) is 1 time/30 minutes, the duration is 10 seconds, and the air blowing pressure is 0.25 Mpa.
10. The method of claim 8, wherein the filter comprises a self-tapping tubular filter for molten metal, and the method comprises the steps of: in the step S4, the air blowing frequency of the air vent plug (9) is 1 time/30 minutes, the duration is 10 seconds, and the air blowing pressure is 0.25 Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110674068.8A CN113332769A (en) | 2021-06-17 | 2021-06-17 | Self-deslagging tubular filter for metal melt and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110674068.8A CN113332769A (en) | 2021-06-17 | 2021-06-17 | Self-deslagging tubular filter for metal melt and working method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113332769A true CN113332769A (en) | 2021-09-03 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202427232U (en) * | 2011-12-30 | 2012-09-12 | 珠海新市节能环保科技有限公司 | Sewage purifier for garbage disposal |
| CN103781921A (en) * | 2011-12-28 | 2014-05-07 | 三井金属矿业株式会社 | Molten-metal filtration apparatus |
| CN208448803U (en) * | 2018-06-29 | 2019-02-01 | 江西宝顺昌特种合金制造有限公司 | A kind of alloy smelting filter device |
| CN209243130U (en) * | 2018-12-10 | 2019-08-13 | 中铝瑞闽股份有限公司 | Aluminum melt filtering device |
| CN215137392U (en) * | 2021-06-17 | 2021-12-14 | 福建麦特新铝业科技有限公司 | Self-deslagging tubular filter for filtering and deslagging of metal melt |
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2021
- 2021-06-17 CN CN202110674068.8A patent/CN113332769A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103781921A (en) * | 2011-12-28 | 2014-05-07 | 三井金属矿业株式会社 | Molten-metal filtration apparatus |
| CN202427232U (en) * | 2011-12-30 | 2012-09-12 | 珠海新市节能环保科技有限公司 | Sewage purifier for garbage disposal |
| CN208448803U (en) * | 2018-06-29 | 2019-02-01 | 江西宝顺昌特种合金制造有限公司 | A kind of alloy smelting filter device |
| CN209243130U (en) * | 2018-12-10 | 2019-08-13 | 中铝瑞闽股份有限公司 | Aluminum melt filtering device |
| CN215137392U (en) * | 2021-06-17 | 2021-12-14 | 福建麦特新铝业科技有限公司 | Self-deslagging tubular filter for filtering and deslagging of metal melt |
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