CN1292082C - Method of purifying aluminium alloy melt - Google Patents
Method of purifying aluminium alloy melt Download PDFInfo
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- CN1292082C CN1292082C CN 200510026593 CN200510026593A CN1292082C CN 1292082 C CN1292082 C CN 1292082C CN 200510026593 CN200510026593 CN 200510026593 CN 200510026593 A CN200510026593 A CN 200510026593A CN 1292082 C CN1292082 C CN 1292082C
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- degasification tank
- dehydrogenation
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Abstract
The present invention relates to a method for purifying A-alloys, which belongs to the field of the treatment of A-alloy fused mass. In the method, inert gas is blown into the A-alloy melt in a rotating blowing mode from the upper part of a gas removing box; simultaneously, the inert gas is blown into the melt from the bottom of the gas removing box by air bricks arranged at the bottom of the gas removing box to ensure the uniform distribution of gas in a molten pool and make all metal liquid in the gas removing body which can be in contact with gas blown in from the upper part and the lower part to enhance dehydrogenation efficiency. The method has the advantages of good dehydrogenation effect and less gas used for dehydrogenation; the gas content of the treated alloy fused mass is from 0.12 to 0.08 ml/100gAl; the consumption ratio of metal to gas is from 0.31 to 0.46 L/kg. The method can be suitable for A-alloys of different brands.
Description
Technical field
What the present invention relates to is a kind of purifying method of metal melt, specifically is a kind of method of removing the purifying aluminium alloy melt of gas in the aluminium alloy, belongs to the aluminium alloy melt process field.
Background technology
The purification of aluminium alloy melt is the gordian technique that guarantees the aluminum alloy materials Metallurgical Quality, and the hydrogen richness that reduces in the molten aluminium is one of main purpose of aluminium melt purifying.The removing hydrogen from aluminum melt purification techniques can be divided into adsorption cleaning and non-adsorption cleaning two big classes by action principle, adsorption cleaning is by adding sorbent material (as gas, solid purificant etc.) in molten aluminium, make in sorbent material and the process that melt contacts, with molten aluminium effect chemistry, physics or machinery taking place, thereby reaches the purpose of dehydrogenation.But not adsorption cleaning is by some physical action (as vacuum, ultrasonic wave etc.), changes the equilibrium state of molten aluminium-gas system, makes the purpose of separating in the calm body of gas thereby reach.
Utilize the gas refinement agent, when promptly air blast carried out the adsorption cleaning dehydrogenation to molten aluminium, owing to can improve the efficient of dehydrogenation by the dynamic conditions that improves dehydrogenation, therefore easy to operate and pollution was lacked.Present existing air blast is to grow up 20th century 70, the eighties mostly, can be divided into single pipe method, porous blow head method, stationary nozzle method and rotary blowing method according to the introduction method of gas.
Find through literature search prior art, Wang Changhai etc. are in " casting " 2001, Vol50, No.4, in " in the removing hydrogen from aluminum melt Progress in technique " literary composition of delivering on the P179-183, existing all kinds of dehydrogenation purifying methods are summed up, and existing degasification method comprises the air blast of flux refining, rotary blowing etc.The state of the art of the dehydrogenation treating plant of various countries can drop to the 0.2-0.4ml/100gAl before handling about 0.1-0.09ml/100gAl mostly at present, improvement along with degassing effect, gas consumption rises significantly, compare SNIF and ALPURUR technology preferably as degassing effect, the rare gas element that every kg aluminium alloy is consumed, promptly the metal gas consumption ratio has reached 0.67-0.84L/kg.Therefore the cost of degasification is higher, and owing to adopt the method for rotary blowing mostly, makes that not only liquid fluctuating is serious, causes oxidation to increase, and is unfavorable for realizing the whole evenly degasification of inside, molten bath simultaneously.
Summary of the invention
The present invention is directed to above-mentioned deficiency of the prior art, a kind of method of purifying aluminium alloy melt is provided, make in its gas in reaching efficient removal aluminium alloy melt, reduce gas usage, and reduce the problem of oxidation that liquid fluctuating brings.
The present invention is achieved by the following technical solutions, the present invention adopts the mode of rotary blowing that rare gas element is blown into the aluminium alloy melt from top in degasification tank, the gas permeable brick installed of bottom by degasification tank is blown into melt with rare gas element from the bottom of degasification tank simultaneously, thereby the uniform distribution of gas in the assurance molten bath, make the metal liquid in the whole degasification tank can touch the gas that the upper and lower is blown into, thereby improve hydrogen degassing efficiency.
Degasification tank top rotary blowing rare gas element N
2, gaseous tension is 0.1-0.15MPa, flow is 0.2-0.3m
3/ h.
Degasification tank bottom winding-up rare gas element N
2, gaseous tension is 0.1-0.05MPa, flow is 0.03-0.05m
3/ h.
The most important innovative point of the present invention is to have realized simultaneously that the melt at each position in whole molten bath all can realize the purpose of dehydrogenation evenly, efficiently because of top and bottom complex blowing; The hydrogen that removes owing to the introducing of bottom gas permeable brick has reduced the top gas inlet significantly, has reduced the liquid fluctuating that causes thus, thereby has helped avoiding melt oxidation to be mingled with the increase of quantity; Owing to evenly jet in the end, top, make the gas utilising efficiency increase simultaneously, thereby reduced the total flow of gas.
The invention has the advantages that: dehydrogenation is effective, and the alloy melt gas content after the processing can reach 0.12-0.08ml/100gAl; Dehydrogenation is gases used few, and the metal gas consumption ratio is 0.31-0.46L/kg; Aluminium alloy applicable to the different trades mark.
Description of drawings
Fig. 1 principle of the invention figure
Embodiment
As shown in Figure 1, provide following examples in conjunction with content of the present invention:
Adopt the inventive method on the aluminium sheet casting and rolling the production line, to carry out actual tests.Leaving standstill the interior aluminium liquid service temperature of stove is about 800 ℃, and aluminium liquid is about 750 ℃ in the degasification tank, and aluminium liquid liquid level 500mm per hour handles molten aluminium 750kg.
The parameter of used gas permeable brick is as follows:
| Chemical ingredients wt%Al 2O 3 Cr 2O 3 | ≥92 ≥4 |
| Volume density g/cm 3 | ≥3.00 |
| Cold crushing strength MPa | ≥80 |
| High temperature break resistant intensity MPa | ≥14 |
| Gas cell distribution | 25 μ m～2 μ m account for 90% |
Embodiment 1
In degasification tank from the top rotary blowing: 200 rev/mins of rotary blowing rotor rotating speeds, gases used N2, flow 0.2m
3/ h, gaseous tension 0.1MPa,
Be blown into melt from the bottom of degasification tank: the gases used N2 of gas permeable brick, gaseous tension are 0.1MPa, and flow is 0.03m
3/ h purifies hydrogen richness 0.10ml/100gAl in the molten aluminium of back, and the metal gas consumption ratio is 0.31L/kg.
Embodiment 2
In degasification tank from the top rotary blowing: 200 rev/mins of rotary blowing rotor rotating speeds, gases used N2, flow are 0.2m
3/ h, gaseous tension 0.15MPa,
Be blown into melt from the bottom of degasification tank: the gases used N2 of gas permeable brick, gaseous tension are 0.1MPa, and flow is 0.03m
3/ h purifies hydrogen richness 0.12ml/100gAl in the molten aluminium of back, and the metal gas consumption ratio is 0.31L/kg.
Embodiment 3
In degasification tank from the top rotary blowing: 200 rev/mins of rotary blowing rotor rotating speeds, gases used N2, flow are 0.3m
3/ h, gaseous tension 0.1MPa
Be blown into melt from the bottom of degasification tank: the gases used N2 of gas permeable brick, gaseous tension are 0.05MPa, and flow is 0.05m
3/ h purifies hydrogen richness 0.09ml/100gAl in the molten aluminium of back, and the metal gas consumption ratio is 0.46L/kg.
Embodiment 4
In degasification tank from the top rotary blowing: 200 rev/mins of rotary blowing rotor rotating speeds, gases used N2, flow are 0.3m
3/ h, gaseous tension 0.15MPa,
Be blown into melt from the bottom of degasification tank: the gases used N2 of gas permeable brick, gaseous tension are 0.1MPa, and flow is 0.05m
3/ h purifies hydrogen richness 0.08ml/100gAl in the molten aluminium of back, and the metal gas consumption ratio is 0.46L/kg.
Claims (3)
1, a kind of method of purifying aluminum alloy, it is characterized in that, in degasification tank, adopt the mode of rotary blowing that rare gas element is blown into the aluminium alloy melt from top, the gas permeable brick installed of bottom by degasification tank is blown into melt with rare gas element from the bottom of degasification tank simultaneously, guarantee the uniform distribution of gas in the molten bath, make the metal liquid in the whole degasification tank can both touch the gas that the upper and lower is blown into, thereby improve hydrogen degassing efficiency.
2, the method for purifying aluminum alloy according to claim 1 is characterized in that, degasification tank top rotary blowing rare gas element N
2, gaseous tension is 0.1-0.15MPa, flow is 0.2-0.3m
3/ h.
3, the method for purifying aluminum alloy according to claim 1 is characterized in that, degasification tank bottom winding-up rare gas element N
2, gaseous tension is 0.1-0.05MPa, flow is 0.03-0.05m
3/ h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510026593 CN1292082C (en) | 2005-06-09 | 2005-06-09 | Method of purifying aluminium alloy melt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510026593 CN1292082C (en) | 2005-06-09 | 2005-06-09 | Method of purifying aluminium alloy melt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1693495A CN1693495A (en) | 2005-11-09 |
| CN1292082C true CN1292082C (en) | 2006-12-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510026593 Expired - Fee Related CN1292082C (en) | 2005-06-09 | 2005-06-09 | Method of purifying aluminium alloy melt |
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| Country | Link |
|---|---|
| CN (1) | CN1292082C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101768671B (en) * | 2009-01-06 | 2012-08-08 | 上海电机学院 | Vertex angle combined blowing type aluminum melt degassing method and device |
| CN102586616B (en) * | 2012-03-09 | 2013-09-25 | 上海电机学院 | Planetary rotating, blowing and degassing device |
| CN102719680A (en) * | 2012-06-21 | 2012-10-10 | 重庆硕龙科技有限公司 | Purification method for light metal and alloy melt thereof |
| CN103060520A (en) * | 2013-01-17 | 2013-04-24 | 马鞍山市润通冶金材料有限公司 | Melted aluminum-based alloy pneumatic stirring and mixing device and method thereof |
| CN103572065A (en) * | 2013-10-28 | 2014-02-12 | 吴雅萍 | Aluminum alloy dehydrogenation method |
| CN104946900B (en) * | 2015-06-19 | 2018-01-05 | 法格霭德兰汽车配件（昆山）有限公司 | A kind of aluminium liquid off gas system |
| CN107805723A (en) * | 2017-09-15 | 2018-03-16 | 广西平果铝合金精密铸件有限公司 | A kind of purifying aluminium alloy melt method |
| CN108642297A (en) * | 2018-07-06 | 2018-10-12 | 广西科技大学 | A kind of method of the online compounding flux processing of light-alloy |
| CN110042266A (en) * | 2019-03-19 | 2019-07-23 | 广西科技大学 | A kind of method of aluminium alloy melt in-line purification |
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2005
- 2005-06-09 CN CN 200510026593 patent/CN1292082C/en not_active Expired - Fee Related
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| CN1693495A (en) | 2005-11-09 |
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Effective date of registration: 20191218 Address after: 201203 room 105g, No.199, GuoShouJing Road, Shanghai pilot Free Trade Zone, Pudong New Area, Shanghai (biological and pharmaceutical innovation building) Co-patentee after: Shu Da Patentee after: Shanghai Jiaotong University Intellectual Property Management Co.,Ltd. Address before: 200240 Dongchuan Road, Shanghai, No. 800, No. Patentee before: SHANGHAI JIAO TONG University |
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Effective date of registration: 20210209 Address after: 330013 office 210-2, investment promotion building, 568 Fenglin Avenue, Nanchang Economic and Technological Development Zone, Nanchang City, Jiangxi Province Patentee after: Jiangxi jindatong New Material Technology Co.,Ltd. Address before: Room 105g, biology and medicine innovation building, 199 GuoShouJing Road, Shanghai pilot Free Trade Zone, Pudong New Area, Shanghai, 201203 Patentee before: Shanghai Jiaotong University Intellectual Property Management Co.,Ltd. Patentee before: Shu Da |
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Granted publication date: 20061227 |