CN1488768A - Efficient aluminium melt spray dehydrogenating method - Google Patents
Efficient aluminium melt spray dehydrogenating method Download PDFInfo
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- CN1488768A CN1488768A CNA031504884A CN03150488A CN1488768A CN 1488768 A CN1488768 A CN 1488768A CN A031504884 A CNA031504884 A CN A031504884A CN 03150488 A CN03150488 A CN 03150488A CN 1488768 A CN1488768 A CN 1488768A
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Abstract
The present invention relates to an aluminium melt spray dehydrogenation method. Before the aluminium melt is fed into the processing tank, it utilizes the spray nozzle to change the aluminium melt into fog-drop reaction jet, and the cleaning gas is introduced in the bottom portion of the processing tank, the fog-drop reaction jet and cleaning gas flow are reverse moved, the hydrogen in the fog-drop can be diffused, and fed into the cleaning gas, and the cleaning gas implemented dehydrogenation can be recovered and undergone the process of recovering treatent, and back retuned into the processing tank to clean the fop-drop melt.
Description
Technical field
What the present invention relates to is degasification method during a kind of metal purification is handled, and particularly a kind of efficient Aluminum Melt Spray Dehydrogenation Method belongs to field of metallurgy.
Background technology
Removing hydrogen from aluminum melt all is a requisite link for any aluminium course of processing, and the quality of removing hydrogen from aluminum melt directly has influence on whether obtain high-quality aluminium.Current removing hydrogen from aluminum melt is mainly according to the bubble theoretical various dehydrogenating process of base growth that are that swim, it is by feed not hydrogenous bubble in molten aluminium, because feeding when the hydrogen branch is pressed in beginning in these bubbles in the molten aluminium is zero, be present in hydrogen in the molten aluminium under the effect of partial pressure difference, will be by diffusing in the bubble gradually in the molten aluminium, and along with bubble floating arrives bath surface, bubble is after bath surface breaks, hydrogen in the bubble enters in the air with regard to breaking away from melt, thereby reaches the purpose of dehydrogenation.Find by literature search, the long he of Dalian University of Technology poplar was write articles " aluminium liquid dehydrogenation purification techniques geared to the 21st century " in 1999 the 1st on the phase P109-111 at " Special Processes of Metal Castings and non-ferrous alloy ", point out in the text, the rotary blowing method is current the application in aluminium industry at most, and is a kind of preferably method of decontamination effect improving of generally acknowledging.But find that in a large amount of industrial application this method gas consumption is very big, degassing efficiency is not that very high (reactive gas---chlorine has higher hydrogen degassing efficiency, but it is a kind of poisonous and environment is had a kind of gas of pollution; Safer with rare gas element, but degassing efficiency is low).The rotary blowing method is analyzed and can be drawn, obtain higher hydrogen degassing efficiency, must satisfy following three conditions: one, produce tiny and disperse is evenly distributed in the molten aluminium, reach shorten hydrogen in melt diffusion length and provide more " passage " for hydrogen enters bubble from melt; Two, make each bubble can hold hydrogen as much as possible; Three, reduce as far as possible or avoid the suction hydrogen of bath surface.But in the rotary blowing method, preceding two is conflicting, and bubble is tiny more, it is just more little to the carrying capacity of hydrogen, and for the 3rd, rotary nozzle and rotor are in rotary course, inevitably bath surface is formed disturbance and forms vortex, this is determined by this dehydrogenating process.Therefore, the rotary blowing method has the defective that air consumption is big, hydrogen degassing efficiency is not high.
Summary of the invention
The present invention is directed to the above-mentioned deficiency and the defective of prior art, a kind of efficient Aluminum Melt Spray Dehydrogenation Method is provided, removing hydrogen from aluminum melt efficient is improved greatly, and avoided the suction hydrogen of bath surface, but also can realize recycling of Purge gas.
The present invention is achieved through the following technical solutions, the present invention becomes enter treatment trough molten aluminium before into droplet shape injection stream by nozzle, bottom at treatment trough feeds Purge gas, droplet shape injection stream and purge gas flow inverse motion, hydrogen in the droplet is by diffusing in the Purge gas, and the Purge gas of finishing the dehydrogenation task is recovered and after recycling, gets back to treatment trough again droplet shape melt is purified, circulation is carried out like this, reaches the purpose of dehydrogenation.
Be provided with an atomizing nozzle in the molten aluminium ingress, molten aluminium forms droplet shape melt behind nozzle, droplet shape melt ejects back formation jet from nozzle and moves from top to bottom, simultaneously, the Purge gas that Purge gas ingress bottom treatment trough feeds becomes inverse motion with droplet shape melt from bottom to top, after dehydrogenation was handled, melt flowed to subsequent technique in the melt exit, and Purge gas is collected by gas concentration unit.
Purge gas after the purifying treatment is after gas concentration unit is collected, flow to the gas recovery treatment station, herein Purge gas is carried out processing such as gas delivery, drying, Purge gas after the processing flows to the Purge gas ingress again melt is carried out the dehydrogenation processing, when the gas that recycles is not enough to melt carried out dehydrogenation and handle, be provided with supply station supply gas in the Purge gas ingress.
The treatment trough top seals, and molten aluminium and air insulated are opened.When molten aluminium is carried out purifying treatment, except containing Purge gas and droplet shape molten aluminium, do not contain the gas that air etc. is unfavorable for dehydrogenation in the treatment trough.
The present invention has substantive distinguishing features and marked improvement, the present invention can be by nozzle the size of size control melt drop and the distribution of jetting stream, easily obtain droplet shape melt tiny and that be evenly distributed, not only make the diffusion distance of hydrogen in melt reduce, and increased hydrogen and enter " passage " of Purge gas; Simultaneously owing to all surround its much bigger Purge gas of volume ratio around each molten aluminium droplet, so Purge gas to the carrying capacity of hydrogen much larger than the melt droplet; In addition, in this method, melt does not contact with air, does not therefore have melt to inhale the phenomenon of hydrogen; In addition, after Purge gas is finished the dehydrogenation task,, realized the recycle of Purge gas, greatly reduced the melt treatment cost through subsequent disposal such as gas recovery.Therefore the present invention has important techniques meaning and economic implications for removing hydrogen from aluminum melt.
Embodiment
Content in conjunction with the inventive method provides following examples:
Pending fine aluminium melt is entered nozzle by the melt inlet place, pending melt has become the droplet shape and has ejected after coming out in the nozzle place, simultaneously, Purge gas (99.99% nitrogen) enters treatment trough from the gas inlet, because the top of treatment trough seals, therefore do not contain any other gas except nitrogen in treatment trough this moment.Like this, droplet shape molten aluminium moves from top to down, and nitrogen is from moving down, and both fully contact, and makes hydrogen enter from droplet shape melt effectively under the effect of partial pressure difference in the nitrogen gas stream.Droplet shape melt is after continuous liquid phase melt is amassed in the remittance of treatment trough bottom, and the place is from treatment trough descriscent subsequent technique in melt goes out.Respectively melt is carried out the hydrogen richness detection at melt inlet place and melt exit simultaneously.
After the nitrogen that Purge gas ingress bottom treatment trough enters arrives the top of treatment trough, gas has been finished the dehydrogenation task, at this moment the gas concentration unit that is in the treatment trough top is collected, nitrogen after being recovered is after the gas recovery treatment station is handled, again enter treatment trough through the Purge gas ingress, recycle like this.When recycle gas is not enough, carry out supply by supply station.
Its result of implementation is as follows: the hydrogen richness at the fine aluminium melt at melt inlet place is 0.34ml/100g Al, is 0.05ml/100g Al at the hydrogen richness of exit melt, and hydrogen degassing efficiency has reached about 85%.
Claims (5)
1, a kind of efficient Aluminum Melt Spray Dehydrogenation Method, it is characterized in that, become enter treatment trough molten aluminium before into droplet shape injection stream by nozzle, bottom at treatment trough feeds Purge gas, droplet shape injection stream and purge gas flow inverse motion, and the hydrogen in the droplet is by diffusing in the Purge gas, the Purge gas of finishing the dehydrogenation task is recovered and after recycling, get back to treatment trough again droplet shape melt is purified, circulation is carried out like this, reaches the purpose of dehydrogenation.
2, efficient Aluminum Melt Spray Dehydrogenation Method according to claim 1, it is characterized in that, be provided with an atomizing nozzle in the molten aluminium ingress, molten aluminium forms droplet shape melt behind nozzle, droplet shape melt ejects back formation jet from nozzle and moves from top to bottom, simultaneously, the Purge gas that Purge gas ingress bottom treatment trough feeds becomes inverse motion with droplet shape melt from bottom to top, after dehydrogenation is handled, molten aluminium flows to subsequent technique in the melt exit, and Purge gas is collected by gas concentration unit.
3, efficient Aluminum Melt Spray Dehydrogenation Method according to claim 1 and 2, it is characterized in that, Purge gas after the purifying treatment is after gas concentration unit is collected, flow to the gas recovery treatment station, herein Purge gas is carried out recyclings such as gas delivery, drying, Purge gas after the processing flows to the Purge gas ingress again melt is carried out the dehydrogenation processing, be provided with supply station supply gas in the Purge gas ingress, the gas that recycles satisfied melt is carried out the requirement that dehydrogenation is handled.
4, efficient Aluminum Melt Spray Dehydrogenation Method according to claim 1 and 2, it is characterized in that the treatment trough top seals, molten aluminium and air insulated are opened, when molten aluminium is carried out purifying treatment, only contain Purge gas and droplet shape molten aluminium in the treatment trough.
5, efficient Aluminum Melt Spray Dehydrogenation Method according to claim 1 and 2 is characterized in that, by the size of nozzle control melt drop and the distribution of jetting stream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03150488 CN1226431C (en) | 2003-08-21 | 2003-08-21 | Efficient aluminium melt spray dehydrogenating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03150488 CN1226431C (en) | 2003-08-21 | 2003-08-21 | Efficient aluminium melt spray dehydrogenating method |
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| Publication Number | Publication Date |
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| CN1488768A true CN1488768A (en) | 2004-04-14 |
| CN1226431C CN1226431C (en) | 2005-11-09 |
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| CN 03150488 Expired - Fee Related CN1226431C (en) | 2003-08-21 | 2003-08-21 | Efficient aluminium melt spray dehydrogenating method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2422847B (en) * | 2003-11-05 | 2008-02-06 | Iouri Vasil Evich Martemianov | Method for fire refining of metals in the thermally balanced system of a drip-gas medium |
| CN101787444A (en) * | 2010-03-12 | 2010-07-28 | 东南大学 | Method for purifying aluminum and aluminum alloy melt in two-phase area by two, three or four repeated times of solidification |
| CN102961935A (en) * | 2012-12-06 | 2013-03-13 | 杭州南方环境净化设备有限公司 | Special filter cylinder revolution blowing regeneration purification system for dedusting equipment and regeneration method |
-
2003
- 2003-08-21 CN CN 03150488 patent/CN1226431C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2422847B (en) * | 2003-11-05 | 2008-02-06 | Iouri Vasil Evich Martemianov | Method for fire refining of metals in the thermally balanced system of a drip-gas medium |
| CN101787444A (en) * | 2010-03-12 | 2010-07-28 | 东南大学 | Method for purifying aluminum and aluminum alloy melt in two-phase area by two, three or four repeated times of solidification |
| CN102961935A (en) * | 2012-12-06 | 2013-03-13 | 杭州南方环境净化设备有限公司 | Special filter cylinder revolution blowing regeneration purification system for dedusting equipment and regeneration method |
| CN102961935B (en) * | 2012-12-06 | 2014-11-05 | 杭州南方环境净化设备有限公司 | Special filter cylinder revolution blowing regeneration purification system for dedusting equipment and regeneration method |
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| Publication number | Publication date |
|---|---|
| CN1226431C (en) | 2005-11-09 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Baoding Longda Aluminum Industry Co., Ltd. Assignor: Shanghai Jiao Tong University Contract fulfillment period: 2008.10.28 to 2013.10.27 Contract record no.: 2009990000081 Denomination of invention: Efficient aluminium melt spray dehydrogenating method Granted publication date: 20051109 License type: Exclusive license Record date: 2009.2.10 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.10.28 TO 2013.10.27; CHANGE OF CONTRACT Name of requester: BAODING LONGDA ALUMINUM CO., LTD. Effective date: 20090210 |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051109 Termination date: 20170821 |