CN110385407B - Filter plate replacing method of aluminum liquid filter basin - Google Patents
Filter plate replacing method of aluminum liquid filter basin Download PDFInfo
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- CN110385407B CN110385407B CN201910809100.1A CN201910809100A CN110385407B CN 110385407 B CN110385407 B CN 110385407B CN 201910809100 A CN201910809100 A CN 201910809100A CN 110385407 B CN110385407 B CN 110385407B
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- aluminum liquid
- filter plate
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- filter
- aluminum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
- B22D43/001—Retaining slag during pouring molten metal
- B22D43/004—Retaining slag during pouring molten metal by using filtering means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
A method for replacing a filter plate of an aluminum liquid filter basin comprises the following steps: A. after casting of the filter plate needing to be replaced is finished, hanging a top cover of the aluminum liquid filtering basin, and removing floating slag on the surface of the aluminum liquid remained above the filter plate; B. opening a vent hole at the bottom of the aluminum liquid filtering basin, and emptying residual aluminum liquid above and below the filtering plate; C. cleaning and pressing the blocks in a hot state, poking a through hole with the diameter of 50-70mm in the filter plate, inputting high-pressure air into the aluminum liquid filter basin by utilizing the through hole, and forcibly cooling the aluminum liquid filter basin to the temperature below 100 ℃; D. hanging the filter plate out of the aluminum liquid filtering basin, cleaning the inner cavity of the aluminum liquid filtering basin again, and then coating a boron nitride release agent on the inner wall of the aluminum liquid filtering basin; E. installing a new filter plate in the aluminum liquid filter basin, placing a pressing block on the preheated filter plate, closing the top cover, and gradually heating up and preheating by using an electric heating pipe; F. and 5-15min before the next casting, baking the filter plate to over 700 ℃ by using open fire for filtering the aluminum liquid in the heat preservation furnace in the casting process.
Description
Technical Field
The invention relates to the field of aluminum processing, in particular to a filter plate replacing method of an aluminum liquid filter basin.
Background
When an aluminum processing enterprise processes ingots, after the components of the molten aluminum in the heat preservation furnace are qualified, the molten aluminum is filtered by a molten aluminum filtering basin and then is sent to a casting machine to be processed into ingots.
The aluminum liquid filtering basin is mainly used for filtering and removing impurities of aluminum liquid in the heat preservation furnace, a filtering plate is placed in the aluminum liquid filtering basin, and a pressing block is placed on the filtering plate to prevent the filtering plate from floating in the aluminum liquid. After the casting of the previous casting time is finished, the filter plate needs to be replaced so as to ensure the quality of the aluminum liquid of the next casting time.
At present, the operating mode of changing the filter in the aluminium liquid filtering basin is that, put the remaining aluminium liquid in the aluminium liquid filtering basin completely earlier, clean up briquetting under the hot attitude, then take out the filter, clean up filters the inner chamber of basin, installs new filter rapidly at last, uses the naked light to toast the new filter of changing after placing the briquetting. So, because operating environment temperature is higher, and remaining aluminium liquid is not solidified completely, lead to filtering basin inner chamber can not clean up completely, cause the aluminium liquid of casting time to press from both sides sediment and secondary pollution easily, along with filtering basin inner chamber long-pending sediment thicker, these long-pending sediment are sintered gradually, can't normally install the filter after using a period, can only scrap the processing. In addition, the temperature of refractory materials and the filter plates in the aluminum liquid filtering basin in a hot state is about 700 ℃ or even higher, an operator is directly exposed to a high-temperature environment and is very easy to scald, burn, sunstroke or dehydration, the filter plates can not be assembled in place at one time when being newly installed, the positions of the filter plates can be adjusted by using tools for many times, the labor intensity is high, the tools are exposed to the high-temperature environment, the annealing deformation is fast, the rolling openings are damaged even, and the equipment expenditure of enterprises is high.
Disclosure of Invention
The invention aims to provide a filter plate replacing method of an aluminum liquid filter basin, which is convenient to operate and high in safety factor, can greatly reduce the labor intensity of workers, obviously improve the cleanness degree of aluminum liquid and prolong the service life of the aluminum liquid filter basin, and aims to overcome the defects of the prior art.
The technical scheme of the invention is as follows: a method for replacing a filter plate of an aluminum liquid filter basin comprises the following steps:
A. after casting of the filter plate needing to be replaced is finished, hanging a top cover of the aluminum liquid filtering basin, and removing floating slag on the surface of the aluminum liquid remained above the filter plate;
B. opening a vent hole at the bottom of the aluminum liquid filtering basin, and emptying residual aluminum liquid above and below the filtering plate;
C. cleaning and pressing the blocks in a hot state, poking a through hole with the diameter of 50-70mm in the filter plate, inputting high-pressure air into the aluminum liquid filter basin by utilizing the through hole, and forcibly cooling the aluminum liquid filter basin to the temperature below 100 ℃;
D. hanging the filter plate out of the aluminum liquid filtering basin, cleaning the inner cavity of the aluminum liquid filtering basin again, and then coating a boron nitride release agent on the inner wall of the aluminum liquid filtering basin;
E. installing a new filter plate in the aluminum liquid filter basin, placing a pressing block on the preheated filter plate, closing the top cover, and gradually heating up and preheating by using an electric heating pipe;
F. baking the filter plate to above 700 ℃ by using open fire 5-15min before the next casting for filtering the aluminum liquid in the heat preservation furnace.
Further, in the step A, the scum is aluminum dross and aluminum skin.
Preferably, the diameter of the through hole in step C is 60 mm.
Preferably, in step F, the filter plate is baked to 700 ℃ using open fire 10min before the next casting.
Adopt above-mentioned technical scheme to have following beneficial effect:
1. according to the method for replacing the filter plate, the cleanliness of the molten aluminum is greatly improved, and the inner cavity of the filter basin can not be completely cleaned all the time due to the comprehensive reasons of high operating environment temperature, incomplete solidification of the molten aluminum and the like in the method in the background art.
2. The safety coefficient of the filter plate replacing method is greatly improved, in the method of the background technology, because the temperature of the refractory material and the filter plate in the inner cavity of the filter basin is about 700 ℃, operators are directly exposed in a high-temperature environment and are very easy to scald, burn, sunstroke or dehydrate, and the like, and the inner cavity of the filter basin is cooled to be below 100 ℃ and is cleaned by the replacing method, so that the potential safety hazard can be avoided.
3. The method for replacing the filter plate greatly reduces the labor intensity, and the background technology method is characterized in that the method is operated in a high-temperature environment, matched tools are roasted to a high temperature of hundreds of degrees, an operator needs to stretch the whole arm into the filtering basin when replacing a new filter plate, the possibility of one-time installation in place is almost eliminated at the high temperature, and the position of the filter plate needs to be adjusted for many times.
4. According to the filter plate replacing method, the service life of the filter basin is greatly prolonged, the method in the background art can not brush a boron nitride release agent, so that slag is accumulated in the inner cavity of the filter basin and is gradually sintered, and a new filter plate cannot be assembled after 0.5 year of use, so that the filter basin is scrapped.
5. The filter plate replacing method greatly reduces the consumption of matched tools, and the matched tools in the background technical scheme, such as shovels, flat shovels and the like, are quickly annealed and deformed, rolled and even directly damaged due to high-temperature baking, so that the service life of the matched tools is extremely short.
The following description will be further described with reference to specific embodiments.
Detailed Description
In the invention, equipment with no specific connection mode is generally carried out according to conventional conditions or conditions suggested by manufacturers, and equipment with a specific model is generally conventional equipment in the chemical field.
Example one
Taking the example of processing aluminum alloy cast ingots in a slab ingot workshop of Chongqing Fenghe aluminum industry Co Ltd, after the aluminum industry components in the heat preservation furnace are qualified, the aluminum alloy components are filtered by an aluminum liquid filtering basin and then are sent into a casting machine for ingot casting operation, a filter plate matched with the aluminum liquid filtering basin needs to be frequently replaced, and the specific method comprises the following steps:
A. after the casting of the previous casting time is finished, a crane is used for hoisting the top cover of the aluminum liquid filtering basin, and the scum on the surface of the aluminum liquid remained above the filtering plate is removed completely by a scum knife;
B. opening a vent hole at the bottom of the aluminum liquid filtering basin until no aluminum liquid leaks out, and emptying residual aluminum liquid above and below the filtering plate;
C. cleaning and pressing blocks in a hot state, poking a through hole with the diameter of 50mm in the filter plate by using an iron brazing rod, inputting high-pressure air with the pressure of 0.2MPa into the aluminum liquid filter basin by using the through hole, and forcibly cooling to 100 ℃;
D. hanging the filter plate out of the aluminum liquid filtering basin by using a travelling crane, cleaning the inner cavity of the aluminum liquid filtering basin again, and then coating a boron nitride release agent on the inner wall of the aluminum liquid filtering basin;
E. installing a new filter plate in the aluminum liquid filter basin, gradually heating up and preheating by using an electric heating pipe, and placing a pressing block on the preheated filter plate;
F. and (3) baking the filter plate by using open fire 5min before the next casting, closing the top cover after the temperature is 700 ℃ until the fire wool emerges, and filtering the aluminum liquid in the heat preservation furnace.
The applicant verifies that the impurities in the ingots in multiple batches meet the production standards of enterprises, and after the aluminum liquid filtering basin is used for 1.2 years, no impurity sintering layer appears in the aluminum liquid filtering basin, and the aluminum liquid filtering basin is initiatively scrapped due to the cracking and poor heat preservation effect of the aluminum liquid filtering basin.
Example two
Taking the example of processing aluminum alloy cast ingots in a slab ingot workshop of Chongqing Fenghe aluminum industry Co Ltd, after the aluminum industry components in the heat preservation furnace are qualified, the aluminum alloy components are filtered by an aluminum liquid filtering basin and then are sent into a casting machine for ingot casting operation, a filter plate matched with the aluminum liquid filtering basin needs to be frequently replaced, and the specific method comprises the following steps:
A. after the casting of the previous casting time is finished, a crane is used for hoisting the top cover of the aluminum liquid filtering basin, and the scum on the surface of the aluminum liquid remained above the filtering plate is removed completely by a scum knife;
B. opening an emptying valve at the bottom of the aluminum liquid filtering basin until no aluminum liquid leaks out, and emptying residual aluminum liquid above and below the filtering plate;
C. cleaning and pressing blocks in a hot state, poking a through hole with the diameter of 60mm in the filter plate by using an iron drill, inputting high-pressure air with the pressure of 0.2MPa into the aluminum liquid filter basin by using the through hole, and forcibly cooling to 90 ℃;
D. hanging the filter plate out of the aluminum liquid filtering basin by using a travelling crane, cleaning the inner cavity of the aluminum liquid filtering basin again, and then coating a boron nitride release agent on the inner wall of the aluminum liquid filtering basin;
E. installing a new filter plate in the aluminum liquid filter basin, gradually heating up and preheating by using an electric heating pipe, and placing a pressing block on the preheated filter plate;
F. and (3) baking the filter plate by using open fire 10min before the next casting, closing the top cover after the temperature is 750 ℃ until the fire wool comes out, and filtering the aluminum liquid in the heat preservation furnace.
The applicant verifies that the impurities in the ingots in multiple batches meet the production standards of enterprises, and after the aluminum liquid filtering basin is used for 1.4 years, no impurity sintering layer appears in the aluminum liquid filtering basin, and the aluminum liquid filtering basin is initiatively scrapped due to the cracking and poor heat preservation effect of the aluminum liquid filtering basin.
EXAMPLE III
Taking the example of processing aluminum alloy cast ingots in a slab ingot workshop of Chongqing Fenghe aluminum industry Co Ltd, after the aluminum industry components in the heat preservation furnace are qualified, the aluminum alloy components are filtered by an aluminum liquid filtering basin and then are sent into a casting machine for ingot casting operation, a filter plate matched with the aluminum liquid filtering basin needs to be frequently replaced, and the specific method comprises the following steps:
A. after the casting of the previous casting time is finished, a crane is used for hoisting the top cover of the aluminum liquid filtering basin, and the scum on the surface of the aluminum liquid remained above the filtering plate is removed completely by a scum knife;
B. opening an emptying valve at the bottom of the aluminum liquid filtering basin until no aluminum liquid leaks out, and emptying residual aluminum liquid above and below the filtering plate;
C. cleaning and pressing blocks in a hot state, poking a through hole with the diameter of 70mm in the filter plate by using an iron brazing rod, inputting high-pressure air with the pressure of 0.2MPa into the aluminum liquid filter basin by using the through hole, and forcibly cooling to 80 ℃;
D. hanging the filter plate out of the aluminum liquid filtering basin by using a travelling crane, cleaning the inner cavity of the aluminum liquid filtering basin again, and then coating a boron nitride release agent on the inner wall of the aluminum liquid filtering basin;
E. installing a new filter plate in the aluminum liquid filter basin, gradually heating up and preheating by using an electric heating pipe, and placing a pressing block on the preheated filter plate;
F. and (3) baking the filter plate by using open fire 15min before the next casting, closing the top cover after the temperature is 700 ℃ until the fire wool emerges, and filtering the aluminum liquid in the heat preservation furnace.
The applicant verifies that the impurities in the ingots in multiple batches meet the production standards of enterprises, and after the aluminum liquid filtering basin is used for 1.6 years, no impurity sintering layer appears in the aluminum liquid filtering basin, and the aluminum liquid filtering basin is initiatively scrapped due to the cracking and poor heat preservation effect of the aluminum liquid filtering basin.
Claims (4)
1. A method for replacing a filter plate of an aluminum liquid filter basin is characterized by comprising the following steps:
A. after casting of the filter plate needing to be replaced is finished, hanging a top cover of the aluminum liquid filtering basin, and removing floating slag on the surface of the aluminum liquid remained above the filter plate;
B. opening a vent hole at the bottom of the aluminum liquid filtering basin, and emptying residual aluminum liquid above and below the filtering plate;
C. cleaning and pressing the blocks in a hot state, poking a through hole with the diameter of 50-70mm in the filter plate, inputting high-pressure air into the aluminum liquid filter basin by utilizing the through hole, and forcibly cooling the aluminum liquid filter basin to the temperature below 100 ℃;
D. hanging the filter plate out of the aluminum liquid filtering basin, cleaning the inner cavity of the aluminum liquid filtering basin again, and then coating a boron nitride release agent on the inner wall of the aluminum liquid filtering basin;
E. installing a new filter plate in the aluminum liquid filter basin, placing a pressing block on the preheated filter plate, closing the top cover, and gradually heating up and preheating by using an electric heating pipe;
F. baking the filter plate to above 700 ℃ by using open fire 5-15min before the next casting, and using the filter plate to filter the aluminum liquid in the heat preservation furnace in the casting process.
2. The filter plate replacement method according to claim 1, wherein the dross in step a is aluminum dross, or aluminum skin.
3. The filter plate replacement method according to claim 1, wherein the aperture of the through holes in step C is 60 mm.
4. The filter plate replacement method according to claim 1, wherein in step F, the filter plate is baked to 700 ℃ using open fire 10min before the next casting.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910809100.1A CN110385407B (en) | 2019-08-29 | 2019-08-29 | Filter plate replacing method of aluminum liquid filter basin |
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| CN201910809100.1A CN110385407B (en) | 2019-08-29 | 2019-08-29 | Filter plate replacing method of aluminum liquid filter basin |
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| CN110385407B true CN110385407B (en) | 2021-05-18 |
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| CN111299567B (en) * | 2019-12-09 | 2021-12-07 | 惠民县久盛铝业有限公司 | Casting device of secondary aluminum |
| CN114136100B (en) * | 2021-12-07 | 2024-03-26 | 河南中孚技术中心有限公司 | Aluminum liquid for aluminum melting furnace Filtering device and construction method |
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| CN201010684Y (en) * | 2007-02-12 | 2008-01-23 | 云南铝业股份有限公司 | Multilevel inclined plug type aluminum liquid filtering box |
| CN201062281Y (en) * | 2007-07-16 | 2008-05-21 | 福州麦特新高温材料有限公司 | Roll-over type filtering box |
| CN101696470A (en) * | 2009-10-20 | 2010-04-21 | 苏州有色金属研究院有限公司 | Aluminum liquid two-stage filter box with double heating functions |
| CN103103362B (en) * | 2013-01-31 | 2015-09-09 | 西南大学 | The reverse double-stage filtering method of aluminium water and filtration unit |
| CN107354322A (en) * | 2017-09-06 | 2017-11-17 | 洛阳新远大冶金成套设备有限公司 | Aluminium liquid Rose Box and aluminium liquid cleaning system |
| CN108127095B (en) * | 2017-12-05 | 2019-05-28 | 燕山大学 | A kind of automatic exchange device of horizontal continuous casting of copper filter |
| CN208279669U (en) * | 2018-05-15 | 2018-12-25 | 深圳市鑫申新材料科技有限公司 | A kind of Rose Box for filtration, purification molten aluminum |
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