CN104232968A - Method for degassing and refining large-specification 2XXX aluminum alloy cast ingot - Google Patents
Method for degassing and refining large-specification 2XXX aluminum alloy cast ingot Download PDFInfo
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Abstract
The invention relates to a method for degassing and refining a large-specification 2XXX aluminum alloy cast ingot. The method comprises the following steps: smelting, refining, primary online degassing and secondary online degassing and the like. The method has the advantages that multiple processes are combined, so that the content of H in the large-specification 2XXX aluminum alloy cast ingot can be controlled to be below 0.07ml/100gAl, the degassing efficiency and degassing quality can be remarkably improved, the large-specification 2XXX aluminum alloy cast ingot without casting defects of cracking, loosening, needle-like pores, entrainment and the like can be obtained, and the finished rate of the cast ingot can achieve more than 90%.
Description
Technical field
The present invention relates to a kind of aluminium alloy manufacture field, be specifically related to a kind of method of 2XXX line aluminium alloy large gauge ingot casting refinery by de-gassing.
Background technology
The good characteristics such as density is little, specific tenacity is high, specific rigidity is high owing to having, good springiness, shock resistance are good, corrosion-resistant, wear-resisting for aluminum and aluminum alloy mateial, high connductivity, high heat conduction, easily surface colour, easily processing, recyclable regeneration, are widely used in the industries such as communications and transportation, packaging vessel, building decoration, aerospace, mechanical electric apparatus, telecommunications, petrochemical complex.Especially, in aerospace industry, because aluminium is first-selected lightweight structure material, therefore consumption is very large.In aeroplane timber, aluminium consumption amount accounts for more than 80%.Aerospacecraft has the feature of high maneuverability, high-load, high resistance to compression and high antifatigue and high speed and high reliability, therefore requires strictly aluminium alloy metallurgical quality.
Along with the domestic large quickening of aircraft localization process and the propelling of the manned astro-engineering, require more and more higher to large gauge high-performance aerospace 2XXX line aluminium alloy quality product, not only require the casting forming function that ingot casting will have and metallurgical quality, and more and more tighter to metallurgical quality defects controlling such as gases (hydrogen).The existence of gas (hydrogen) directly can have influence on the intensity of alloy product, viscous deformation performance and final use properties.The efficient dehydrogenation refining of aluminium alloy is the difficult problem that domestic and international aluminium processing industry is captured always, and online outgas technique is also the development and the research that obtain emphasis in Ge great aluminium alloy enterprise.
The online dehydrogenation purifying method of aluminum current melt mainly contains preferably: as U.S. combinating carbide company SNIF method, France Bi Xinie company ALPUR method, Britain associating Chinalco RDU method, Alcoa469 method, Alcoa181 method, Chinalco of Britain FILD method, the multiple methods such as American Association Chinalco MINT method; These methods have their own characteristics each, it is mainly directly contacted with sorbent material (various gas, liquid, solid refined agent and filtration medium) by molten aluminium, the gas in sorbent material and melt and solid oxidation inclusion is made to occur physicochemical, physics or the effect of machinery, reach the object of degasification removal of impurities, but degassing effect difference with insignificance.Since the nineties in 20th century, the purifying technology of domestic molten aluminium is enhanced, and the hydrogen richness in duralumin can reach 0.12-0.14ml/100gAl level, and 10 μm of slag inclusions can remove more than 90%; The higher level in laboratory some.The technology such as the online degasification of Southwest Aluminum (Group) Co., Ltd. and hydrogen richness detection are advanced at home.But on the whole, the purifying technology of China's molten aluminium and level, with compared with international most advanced level, also have larger gap.
The air blast (blinster flotation method) of online dehydrogenation purification techniques as traditional of domestic present use can only meet the condition of certain aspect, is difficult to the requirements meeting purification.And although filtration method can remove the inclusion in melt, dehydrogenation has little effect.Solvent method is the degasification method more widely used, but reusing of various insulating covering agent, degasifier causes solvent cost to increase, and simultaneously also artificial increase can introduce the probability of new impurity.Vacuum-treat is the most effective way reducing Hydrogen Content in Molten Aluminum content, but vacuum apparatus is expensive needed for it, cause melt temperature to lose larger simultaneously, purification capacity is also very limited, seldom adopt in the industrial production, dehydrogenation technology domestic is at present mainly derived from developed country, and the technology of autonomous innovation is few.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, there is provided one can significantly improve degassing efficiency and degasification quality, eliminate the crackle of 2XXX line aluminium alloy large gauge ingot casting, shrinkage cavity, pinhole, the method for casting flaw such as to be mingled with, make removing hydrogen from aluminum melt rate reach more than 70%, ingot casting yield rate reaches more than 90%.
The present invention is achieved in that
A method for 2XXX line aluminium alloy large gauge ingot casting refinery by de-gassing, is characterized in that: comprise the steps such as melting, refining, the online degasification of one-level and the online degasification of secondary, step is as follows:
(1) melting: purity is reached in 99.75% and above aluminium ingot input smelting furnace and carry out melting, weighted and after shove charge by proportioning, adopt the heat-accumulating type nozzle of heat energy efficiency and good leak tightness to melt aluminium stove and carry out melting, speed of melting is accelerated by induction stirring in fusion process, and with forklift for slag, slag operation is taken off to aluminium liquid slag inclusion, slag-removing time is less than 45 minutes, after skimming, composition analysis is carried out in sampling, then alloying constituent is adjusted, make its alloying constituent reach requirement, aluminium liquid at melting in-furnace time lower than 8h.
(2) refining: go to holding furnace inside holding after aluminium liquid is heated to 720 ~ 760 DEG C, leave standstill, and carry out the interpolation of easy scaling loss alloying element, then carry out furnace refining; After aluminium liquid proceeds to holding furnace, open induction stirring, and be again heated to 720 ~ 760 DEG C, after alloying constituent is qualified, carry out elementary refining, adopt chlorine and the refining of argon gas mixed gas, chlorine flowrate .01-0.18m
3/ h, chlorine gas pressure is 50-650Kpa, argon flow amount 0.1-10m
3/ h, argon pressure 100-980Kpa, refining time is 10 ~ 30min, needs to clear up the scum silica frost on aluminium liquid surface in refining process, stopping induction stirring after refining completes.
(3) the online degasification of one-level: after furnace refining completes, online hydrogen meter is used to measure the liquid hydrogen content of molten aluminium at one-level aluminium spout, aluminium liquid is gone to one-level degasifying device, chlorine and argon gas mixed gas are undertaken stirring the bubble forming small disperse by rotor by one-level degasifying device, free hydrogen in bubble floating process in Al adsorption liquid and objectionable impurities, in degassing procedure, temperature of aluminum liquid remains between 720 ~ 750 DEG C, completes the online degasification slagging-off of one-level.
(4) the online degasification of secondary: aluminium liquid is after one-level degasifying device, aluminium liquid is gone to secondary degasifying device, argon gas is undertaken by rotor stirring the bubble forming small disperse by secondary degasifying device, free hydrogen in bubble floating process in Al adsorption liquid and objectionable impurities, in degassing procedure, temperature of aluminum liquid remains between 720 ~ 750 DEG C, complete the online degasification slagging-off of secondary, in secondary aluminium spout, finally use online hydrogen meter to measure the liquid hydrogen content of molten aluminium.
The processing condition of the online degasification of above-described one-level are: rotor speed 300-500Rpm, chlorine gas pressure 20-300Kpa, chlorine flowrate 0.01-2m
3/ h, argon pressure 50-500Kpa, argon flow amount 0.05-6m
3/ h.
The processing condition of the online degasification of above-described secondary are: rotor speed 300-500Rpm, argon pressure 50-500Kpa, argon flow amount 0.05-6m
3/ h.
The equipment of 2XXX line aluminium alloy large gauge ingot casting refinery by de-gassing of the present invention, it is characterized in that: comprise kettle furnace, except gas holder, one-level aluminium spout, one-level refine equipment on line, secondary refine equipment on line, secondary aluminium spout and on-line filtration groove, described kettle furnace, one-level aluminium spout, one-level refine equipment on line, secondary refine equipment on line, secondary aluminium spout are connected successively with on-line filtration groove, are provided with refining rifle in kettle furnace; Refinery by de-gassing equipment also comprises except gas holder, and described refining rifle is connected with except gas holder by refining mixed gas pipeline.
Above-described one-level refine equipment on line is connected with except gas holder by degasification mixed gas pipeline, and described secondary refine equipment on line is connected with except gas holder by degasification argon gas pipeline.
Ceramic filter plate is provided with in above-described on-line filtration groove.
Outstanding substantive distinguishing features of the present invention and significant progress are:
1, the method for 2XXX line aluminium alloy large gauge ingot casting refinery by de-gassing of the present invention adopts secondary degasification in degassing procedure, make the better effects if of degasification, can the H content in 2XXX line aluminium alloy large gauge ingot casting be controlled at below 0.07ml/100gAl, the requirement of following aerospace aluminium alloy quality can be met.
2, the method for 2XXX line aluminium alloy large gauge ingot casting refinery by de-gassing of the present invention adopts kinds of processes to combine, degassing efficiency and degasification quality can be significantly improved, the casting flaw 2XXX line aluminium alloy large gauge ingot casting such as obtain flawless, loose, pinhole, be mingled with, makes ingot casting yield rate reach more than 90%.
3,2XXX line aluminium alloy large gauge ingot casting refinery by de-gassing device structure of the present invention is reasonable in design, and cost of manufacture is low, long service life, easy to maintenance.
Accompanying drawing explanation
Fig. 1 is 2XXX line aluminium alloy large gauge ingot casting refinery by de-gassing device structure simplified schematic diagram of the present invention.
Reference numeral title and sequence number illustrate:
Kettle furnace 1, refining rifle 2, except gas holder 3, one-level aluminium spout 4, one-level refine equipment on line 5, secondary refine equipment on line 6, secondary aluminium spout 7, on-line filtration groove 8, degasification mixed gas pipeline 9, degasification argon gas pipeline 10, refining mixed gas pipeline 11.
Embodiment
Be further described below in conjunction with the method for drawings and Examples to 2XXX line aluminium alloy large gauge ingot casting refinery by de-gassing of the present invention.
As shown in Figure 1, for 2XXX line aluminium alloy large gauge ingot casting refinery by de-gassing equipment, comprise kettle furnace 1, refining rifle 2, except gas holder 3, one-level aluminium spout 4, one-level refine equipment on line 5, secondary refine equipment on line 6, secondary aluminium spout 7, on-line filtration groove 8, degasification mixed gas pipeline 9, degasification argon gas pipeline 10 and refining mixed gas pipeline 11, described kettle furnace 1, one-level aluminium spout 4, one-level refine equipment on line 5, secondary refine equipment on line 6, secondary aluminium spout 7 is connected successively with on-line filtration groove 8, refining rifle 2 is provided with in kettle furnace 1, described refining rifle 2 is connected with except gas holder 3 by refining mixed gas pipeline 11, described one-level refine equipment on line 5 is connected with except gas holder 3 by degasification mixed gas pipeline 9, described secondary refine equipment on line 6 is connected with except gas holder 3 by degasification argon gas pipeline 10, ceramic filter plate is provided with in described on-line filtration groove 8.
Embodiment 1
To produce 2219 aluminium alloys:
(1) melting: purity is reached in 99.75% and above aluminium ingot input smelting furnace and carry out melting, weighted and after shove charge by proportioning, adopt the heat-accumulating type nozzle of heat energy efficiency and good leak tightness to melt aluminium stove and carry out melting, in fusion process, accelerate speed of melting by induction stirring, and with forklift for slag, slag operation is taken off to aluminium liquid slag inclusion, slag-removing time 42 minutes, after skimming, composition analysis is carried out in sampling, then adjust alloying constituent, make its alloying constituent reach requirement, aluminium liquid at melting in-furnace time lower than 7.
(2) refining: go to holding furnace inside holding after aluminium liquid is heated to 720 DEG C, leave standstill, and carry out the interpolation of easy scaling loss alloying element, then carry out furnace refining; After aluminium liquid proceeds to holding furnace, open induction stirring, and be again heated to 720 DEG C, after alloying constituent is qualified, carry out elementary refining, adopt chlorine and the refining of argon gas mixed gas, chlorine flowrate 0.01m
3/ h, chlorine gas pressure is 50Kpa, argon flow amount 0.1m
3/ h, argon pressure 100Kpa, refining time is 10min, needs to clear up the scum silica frost on aluminium liquid surface in refining process, stopping induction stirring after refining completes.
(3) the online degasification of one-level: after furnace refining completes, online hydrogen meter is used to measure the liquid hydrogen content of molten aluminium at one-level aluminium spout, aluminium liquid is gone to one-level degasifying device, chlorine and argon gas mixed gas are undertaken stirring the bubble forming small disperse by rotor by one-level degasifying device, free hydrogen in bubble floating process in Al adsorption liquid and objectionable impurities, in degassing procedure, temperature of aluminum liquid remains on 720 DEG C, complete the online degasification slagging-off of one-level, processing condition are: rotor speed 300Rpm, chlorine gas pressure 20Kpa, chlorine flowrate 0.01m
3/ h, argon pressure 50Kpa, argon flow amount 0.05m
3/ h.
(4) the online degasification of secondary: aluminium liquid is after one-level degasifying device, aluminium liquid is gone to secondary degasifying device, argon gas is undertaken by rotor stirring the bubble forming small disperse by secondary degasifying device, free hydrogen in bubble floating process in Al adsorption liquid and objectionable impurities, in degassing procedure, temperature of aluminum liquid remains on 720 DEG C, and complete the online degasification slagging-off of secondary, processing condition are: rotor speed 300Rpm, argon pressure 50Kpa, argon flow amount 0.05m
3/ h, finally uses online hydrogen meter to measure the liquid hydrogen content of molten aluminium in secondary aluminium spout.
Embodiment 2
To produce 2219 aluminium alloys:
(1) melting: purity is reached in 99.75% and above aluminium ingot input smelting furnace and carry out melting, weighted and after shove charge by proportioning, adopt the heat-accumulating type nozzle of heat energy efficiency and good leak tightness to melt aluminium stove and carry out melting, in fusion process, accelerate speed of melting by induction stirring, and with forklift for slag, slag operation is taken off to aluminium liquid slag inclusion, slag-removing time 40 minutes, after skimming, composition analysis is carried out in sampling, then adjust alloying constituent, make its alloying constituent reach requirement, aluminium liquid at melting in-furnace time lower than 7.5.
(2) refining: go to holding furnace inside holding after aluminium liquid is heated to 730 DEG C, leave standstill, and carry out the interpolation of easy scaling loss alloying element, then carry out furnace refining; After aluminium liquid proceeds to holding furnace, open induction stirring, and be again heated to 730 DEG C, after alloying constituent is qualified, carry out elementary refining, adopt chlorine and the refining of argon gas mixed gas, chlorine flowrate 0.10m
3/ h, chlorine gas pressure is 150Kpa, argon flow amount 2m
3/ h, argon pressure 300Kpa, refining time is 20min, needs to clear up the scum silica frost on aluminium liquid surface in refining process, stopping induction stirring after refining completes.
(3) the online degasification of one-level: after furnace refining completes, online hydrogen meter is used to measure the liquid hydrogen content of molten aluminium at one-level aluminium spout, aluminium liquid is gone to one-level degasifying device, chlorine and argon gas mixed gas are undertaken stirring the bubble forming small disperse by rotor by one-level degasifying device, free hydrogen in bubble floating process in Al adsorption liquid and objectionable impurities, in degassing procedure, temperature of aluminum liquid remains on 730 DEG C, complete the online degasification slagging-off of one-level, processing condition are: rotor speed 350Rpm, chlorine gas pressure 100Kpa, chlorine flowrate 0.5m
3/ h, argon pressure 150Kpa, argon flow amount 2m
3/ h.
(4) the online degasification of secondary: aluminium liquid is after one-level degasifying device, aluminium liquid is gone to secondary degasifying device, argon gas is undertaken by rotor stirring the bubble forming small disperse by secondary degasifying device, free hydrogen in bubble floating process in Al adsorption liquid and objectionable impurities, in degassing procedure, temperature of aluminum liquid remains on 730 DEG C, and complete the online degasification slagging-off of secondary, processing condition are: rotor speed 380Rpm, argon pressure 200Kpa, argon flow amount 2m
3/ h, finally uses online hydrogen meter to measure the liquid hydrogen content of molten aluminium in secondary aluminium spout.
Embodiment 3
To produce 2124 aluminium alloys:
(1) melting: purity is reached in 99.75% and above aluminium ingot input smelting furnace and carry out melting, weighted and after shove charge by proportioning, adopt the heat-accumulating type nozzle of heat energy efficiency and good leak tightness to melt aluminium stove and carry out melting, speed of melting is accelerated by induction stirring in fusion process, and with forklift for slag, slag operation is taken off to aluminium liquid slag inclusion, slag-removing time 35 minutes, after skimming, composition analysis is carried out in sampling, then alloying constituent is adjusted, make its alloying constituent reach requirement, aluminium liquid at melting in-furnace time lower than 6.5h.
(2) refining: go to holding furnace inside holding after aluminium liquid is heated to 740 DEG C, leave standstill, and carry out the interpolation of easy scaling loss alloying element, then carry out furnace refining; After aluminium liquid proceeds to holding furnace, open induction stirring, and be again heated to 740 DEG C, after alloying constituent is qualified, carry out elementary refining, adopt chlorine and the refining of argon gas mixed gas, chlorine flowrate 0.15m
3/ h, chlorine gas pressure is 400Kpa, argon flow amount 5m
3/ h, argon pressure 600Kpa, refining time is 25min, needs to clear up the scum silica frost on aluminium liquid surface in refining process, stopping induction stirring after refining completes.
(3) the online degasification of one-level: after furnace refining completes, online hydrogen meter is used to measure the liquid hydrogen content of molten aluminium at one-level aluminium spout, aluminium liquid is gone to one-level degasifying device, chlorine and argon gas mixed gas are undertaken stirring the bubble forming small disperse by rotor by one-level degasifying device, free hydrogen in bubble floating process in Al adsorption liquid and objectionable impurities, in degassing procedure, temperature of aluminum liquid remains on 740 DEG C, complete the online degasification slagging-off of one-level, processing condition are: rotor speed 400Rpm, chlorine gas pressure 200Kpa, chlorine flowrate 1m
3/ h, argon pressure 400Kpa, argon flow amount 4m
3/ h.
(4) the online degasification of secondary: aluminium liquid is after one-level degasifying device, aluminium liquid is gone to secondary degasifying device, argon gas is undertaken by rotor stirring the bubble forming small disperse by secondary degasifying device, free hydrogen in bubble floating process in Al adsorption liquid and objectionable impurities, in degassing procedure, temperature of aluminum liquid remains on 740 DEG C, and complete the online degasification slagging-off of secondary, processing condition are: rotor speed 400Rpm, argon pressure 400Kpa, argon flow amount 4m
3/ h, finally uses online hydrogen meter to measure the liquid hydrogen content of molten aluminium in secondary aluminium spout.
Embodiment 4
To produce 2124 aluminium alloys:
(1) melting: purity is reached in 99.75% and above aluminium ingot input smelting furnace and carry out melting, weighted and after shove charge by proportioning, adopt the heat-accumulating type nozzle of heat energy efficiency and good leak tightness to melt aluminium stove and carry out melting, in fusion process, accelerate speed of melting by induction stirring, and with forklift for slag, slag operation is taken off to aluminium liquid slag inclusion, slag-removing time 38 minutes, after skimming, composition analysis is carried out in sampling, then adjust alloying constituent, make its alloying constituent reach requirement, aluminium liquid at melting in-furnace time lower than 6h.
(2) refining: go to holding furnace inside holding after aluminium liquid is heated to 760 DEG C, leave standstill, and carry out the interpolation of easy scaling loss alloying element, then carry out furnace refining; After aluminium liquid proceeds to holding furnace, open induction stirring, and be again heated to 760 DEG C, after alloying constituent is qualified, carry out elementary refining, adopt chlorine and the refining of argon gas mixed gas, chlorine flowrate 0.18m
3/ h, chlorine gas pressure is 650Kpa, argon flow amount 10m
3/ h, argon pressure 980Kpa, refining time is 30min, needs to clear up the scum silica frost on aluminium liquid surface in refining process, stopping induction stirring after refining completes.
(3) the online degasification of one-level: after furnace refining completes, online hydrogen meter is used to measure the liquid hydrogen content of molten aluminium at one-level aluminium spout, aluminium liquid is gone to one-level degasifying device, chlorine and argon gas mixed gas are undertaken stirring the bubble forming small disperse by rotor by one-level degasifying device, free hydrogen in bubble floating process in Al adsorption liquid and objectionable impurities, in degassing procedure, temperature of aluminum liquid remains on 750 DEG C, complete the online degasification slagging-off of one-level, processing condition are: rotor speed 500Rpm, chlorine gas pressure 300Kpa, chlorine flowrate 2m
3/ h, argon pressure 500Kpa, argon flow amount 6m
3/ h.
(4) the online degasification of secondary: aluminium liquid is after one-level degasifying device, aluminium liquid is gone to secondary degasifying device, argon gas is undertaken by rotor stirring the bubble forming small disperse by secondary degasifying device, free hydrogen in bubble floating process in Al adsorption liquid and objectionable impurities, in degassing procedure, temperature of aluminum liquid remains on 750 DEG C, and complete the online degasification slagging-off of secondary, processing condition are: rotor speed 500Rpm, argon pressure 500Kpa, argon flow amount 6m
3/ h, finally uses online hydrogen meter to measure the liquid hydrogen content of molten aluminium in secondary aluminium spout.
The contrast of hydrogen richness before and after 2XXX line aluminium alloy melt of the present invention degasification:
| Product | The aluminium alloy trade mark | Temperature | Ml/100g Al before degasification | Ml/100g Al after filtering |
| Embodiment 1 | 2219 aluminium alloys | 722 | 0.371 | 0.055 |
| Embodiment 2 | 2219 aluminium alloys | 728 | 0.375 | 0.060 |
| Embodiment 3 | 2124 aluminium alloys | 735 | 0.298 | 0.068 |
| Embodiment 4 | 2124 aluminium alloys | 746 | 0.231 | 0.064 |
As can be seen from the above table after refining degasification of the present invention, Hydrogen In Molten Aluminum Alloys content is reduced to below 0.07ml/100g, exceedes national standard requirement; Meet the requirement of following aerospace aluminium alloy quality completely.
Claims (3)
1. a method for 2XXX line aluminium alloy large gauge ingot casting refinery by de-gassing, is characterized in that: comprise the steps such as melting, refining, the online degasification of one-level and the online degasification of secondary, step is as follows:
(1) melting: purity is reached in 99.75% and above aluminium ingot input smelting furnace and carry out melting, weighted and after shove charge by proportioning, adopt the heat-accumulating type nozzle of heat energy efficiency and good leak tightness to melt aluminium stove and carry out melting, speed of melting is accelerated by induction stirring in fusion process, and with forklift for slag, slag operation is taken off to aluminium liquid slag inclusion, slag-removing time is less than 45 minutes, after skimming, composition analysis is carried out in sampling, then alloying constituent is adjusted, make its alloying constituent reach requirement, aluminium liquid at melting in-furnace time lower than 8h;
(2) refining: go to holding furnace inside holding after aluminium liquid is heated to 720 ~ 760 DEG C, leave standstill, and carry out the interpolation of easy scaling loss alloying element, then carry out furnace refining; After aluminium liquid proceeds to holding furnace, open induction stirring, and be again heated to 720 ~ 760 DEG C, after alloying constituent is qualified, carry out elementary refining, adopt chlorine and the refining of argon gas mixed gas, chlorine flowrate .01-0.18m
3/ h, chlorine gas pressure is 50-650Kpa, argon flow amount 0.1-10m
3/ h, argon pressure 100-980Kpa, refining time is 10 ~ 30min, needs to clear up the scum silica frost on aluminium liquid surface in refining process, stopping induction stirring after refining completes;
(3) the online degasification of one-level: after furnace refining completes, online hydrogen meter is used to measure the liquid hydrogen content of molten aluminium at one-level aluminium spout, aluminium liquid is gone to one-level degasifying device, chlorine and argon gas mixed gas are undertaken stirring the bubble forming small disperse by rotor by one-level degasifying device, free hydrogen in bubble floating process in Al adsorption liquid and objectionable impurities, in degassing procedure, temperature of aluminum liquid remains between 720 ~ 750 DEG C, completes the online degasification slagging-off of one-level;
(4) the online degasification of secondary: aluminium liquid is after one-level degasifying device, aluminium liquid is gone to secondary degasifying device, argon gas is undertaken by rotor stirring the bubble forming small disperse by secondary degasifying device, free hydrogen in bubble floating process in Al adsorption liquid and objectionable impurities, in degassing procedure, temperature of aluminum liquid remains between 720 ~ 750 DEG C, complete the online degasification slagging-off of secondary, in secondary aluminium spout, finally use online hydrogen meter to measure the liquid hydrogen content of molten aluminium.
2. the method for 2XXX line aluminium alloy large gauge ingot casting refinery by de-gassing according to claim 1, is characterized in that: the processing condition of the online degasification of described one-level are: rotor speed 300-500Rpm, chlorine gas pressure 20-300Kpa, chlorine flowrate 0.01-2m
3/ h, argon pressure 50-500Kpa, argon flow amount 0.05-6m
3/ h.
3. the method for 2XXX line aluminium alloy large gauge ingot casting refinery by de-gassing according to claim 1, is characterized in that: the processing condition of the online degasification of described secondary are: rotor speed 300-500Rpm, argon pressure 50-500Kpa, argon flow amount 0.05-6m
3/ h.
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| CN104805319B (en) * | 2015-04-30 | 2017-01-18 | 广西南南铝加工有限公司 | Manufacturing method for 2xxx series ultra-large-dimension aluminum alloy round ingot |
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| CN111676403A (en) * | 2020-04-02 | 2020-09-18 | 山东南山铝业股份有限公司 | Large-size 2-series aluminum alloy ingot for civil aircraft and preparation method thereof |
| CN111876619A (en) * | 2020-07-17 | 2020-11-03 | 南南铝业股份有限公司 | Aluminum alloy melt refining treatment device and method for obtaining ultralow hydrogen and slag content |
| CN111893316A (en) * | 2020-07-17 | 2020-11-06 | 南南铝业股份有限公司 | Aluminum melt refining equipment and method for reducing metal nodules on surface of aluminum alloy cast rod |
| CN112501521A (en) * | 2020-11-30 | 2021-03-16 | 西安市康铖机械制造有限公司 | Processing method of ultrahigh-strength aviation structural steel |
| CN113369482A (en) * | 2021-04-09 | 2021-09-10 | 广东鸿邦金属铝业有限公司 | Molten aluminum smelting method and molten aluminum |
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