CN1147605C - La-Pr-Ce-Al alloy and its production process - Google Patents
La-Pr-Ce-Al alloy and its production processInfo
- Publication number
- CN1147605C CN1147605C CNB011125845A CN01112584A CN1147605C CN 1147605 C CN1147605 C CN 1147605C CN B011125845 A CNB011125845 A CN B011125845A CN 01112584 A CN01112584 A CN 01112584A CN 1147605 C CN1147605 C CN 1147605C
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- China
- Prior art keywords
- cerium
- lanthanum
- praseodymium
- rare earth
- alloy
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Abstract
The present invention relates to a lanthanum, praseodymium, cerium and aluminium alloy, which has the purpose to provide a lanthanum, praseodymium, cerium and aluminium alloy with good production performance by utilizing a large amount of rest lanthanum, praseodymium and cerium mixed rare earth as raw materials after neodymium and cerium are extracted, wherein the lanthanum, praseodymium and rare earth comprises 88 to 93% of lanthanum/mixed rare earth (La/RE), 5 to 10% of praseodymium/ mixed rare earth (Pr/RE), 2 to 10% of cerium/ mixed rare earth (Ce/RE) and 0.01 to 1% of neodymium/ mixed rare earth (Nd/RE). The lanthanum, praseodymium, cerium and aluminium alloy is used as metallurgical additives and has finer organization capability, stronger dehydrogenation capability and stronger reduction capability than those of an ordinary mixed rare earth alloy.
Description
The present invention relates to the rare earth metal field, particularly relate to a kind of La-Pr-Ce-Al alloy and production technique thereof.
Adding rare earth compound (carbonate, oxychlorination thing, oxide compound) direct production rare earth aluminium alloy in industrial cell is the innovative technology of China Changchun Applied Chemistry Research Inst., Chinese Academy of Sciences and Northeastern University.This product is used on high conductive aluminum conductor and the architectural aluminum section material more.Because the raw material that adopts was common mishmetal at that time, price is more expensive, fixed at that time rare earth aluminium alloy too high (the alloy ratio aluminium ingot 300-400 of the carrying per ton unit that contains the 0.2-0.3% rare earth), aluminium process unit thinks and oneself buys rare earth metal, more worthwhile with aluminium preparation rare earth aluminium alloy, do not buy the rare earth aluminium alloy that electrolytic aluminium factory is sold.
And along with the development of rare earth metal Application Areas, the consumption market of Neodymium trioxide and cerium oxide constantly enlarges, the demand sharp increase, their price is than high many of common mishmetal, become the leading product of rare-earth trade, and carried neodymium, carry a large amount of lpc rare-earth mixtures remaining behind the cerium and become neodymium, the cerium byproduct in producing and (produce 1 ton of Nd
2O
34 tons of this byproducts are just arranged), this a large amount of byproduct has become the restraining factors that have a strong impact on the balanced growth of rare earth industry.
The object of the present invention is to provide a kind of byproduct that utilizes in neodymium, the cerium production, promptly extracting a large amount of lpc rare-earth mixtures that are left behind neodymium, the cerium is raw material, the La-Pr-Ce-Al alloy that production performance is good.
The present invention realizes as follows:
La-Pr-Ce-Al alloy of the present invention is characterized in that: % counts by weight, and the lpc rare-earth mixture total amount is 0.15-0.5 or 6-8 two classes, and all the other are aluminium.Wherein, the lpc rare-earth mixture total amount is in 0.15-0.5 or 6-8 two classes, and the lanthanum praseodymium cerium mischmetal partition in each class is:
Lanthanum/mishmetal (La/RE) 88-93%
Praseodymium/mishmetal (Pr/RE) 5-10%
Cerium/mishmetal (Ce/RE) 2-10%
Neodymium/mishmetal (Nd/RE) 0.01-1%
La-Pr-Ce-Al alloy of the present invention, its production technique are the carbonate that add to extract remaining lanthanum praseodymium and a small amount of cerium behind product marketing is good, price is high cerium and the neodymium in industrial aluminum electrolysis bath, and its chemical ingredients is the % meter by weight, is expressed as follows:
REO 48-52
SO
4 2- ＜0.03
PO
4 3- ＜0.01
REO middle-weight rare earths partition is:
La
2O
3/REO ＞88
Pr
6O
11/REO 5-10
CeO
2/REO 2-10
Nd
2O
3/REO ＜1。
The advantage of La-Pr-Ce-Al alloy of the present invention is:
1, a large amount of cheap lanthanum praseodymium ceriums (a small amount of cerium) add in the aluminium cell, not only produce rare earth aluminium alloy, and can improve the apparent current efficiency 2-3% of aluminium, alternating-current unit consumption decline 400-496Kwh/tAl is improved traditional aluminum electrolyzation technology and improves.
2, aluminium manufacturer only need be added to carbonated rare earth raw material cost (alloy per ton only needs about 50 yuan) the alloy product sale, and this is more suitable than aluminum fabrication plant purchase rare earth metal and aluminium alloyage, also can save the energy consumption and the burning combustion loss of secondary remelting.
3, utilize and to carry cerium, carry neodymium after a large amount of cheap lanthanum praseodymium cerium (a small amount of cerium) of residue be raw material, in aluminium cell, produce La-Pr-Ce-Al alloy, meet the most optimum distribution of resources principle, help the balance Sustainable development of rare earth industry.
4, the La-Pr-Ce-Al alloy obtained of the present invention as metallurgical addition agent than general with mixed rare earth alloy thinning microstructure ability, dehydrogenation ability and reducing power are stronger.
The present invention will be described in more detail below in conjunction with embodiment.
The experiment electrolyzer
Selected two technico-economical comparisones are close, groove age, identical (No. 52 grooves were to start in May, 93, No. 58 grooves are to start in July, 93, two grooves all are the aged grooves of having spent the overhaul phase) No. 58 and No. 52 electrolyzers, grooved is that side is inserted the soderberg cell, No. 58 No. 52 as comparison groove as Thoughs.
Processing parameter and technical qualification
| Project | No. 52, Thoughs | No. 58, comparison groove |
| Strength of current A | 61500 | 61500 |
| Anodic current density A/cm 2 | 0.854 | 0.854 |
| Anode dimension mm | 4000×1800 | 4000×1800 |
| Conductive anode rod root | 52 | 52 |
| Machined surface | (550+450)×2 | (550+450)×2 |
| Groove thorax degree of depth mm | 450 | 450 |
| Operating voltage V | 4.2 | 4.2 |
| Electrolysis temperature ℃ | 950-960 | 950-960 |
| Pole span cm | 3.8-4 | 3.8-4 |
| Metal level cm | 25 | 25 |
| Electrolyte level cm | 15 | 15 |
| Al 2O 3％ | 3.0-8.0 | 3.0-8.0 |
| MgF 2％ | 3-5 | 3-5 |
| CaF 2％ | 3-5 | 3-5 |
| REO％ | 0.2-0.3 | 0.2-0.3 |
| Molecular ratio | 3-3.1 | 3-3.1 |
The rare earth addition
In first three day of on-test, 5 kilograms of rare earth carbonates were added at every interval in 12 hours in electrolyzer, when groove middle-weight rare earths content reaches right more than 0.2%, then according to the result of laboratory test every day of additional rare earth carbonate 4-5 kilogram that adds in groove.
The rare earth addition means
With the insulation material on the machined surface take off to groove along the plate inboard.Load weighted rare earth is evenly spread (welt portion) on the shell face, covers one deck aluminum oxide again, and be no less than three hours warm up time, when reinforced, do not take off material and directly squeeze in the groove.
Embodiment 1: carrying out the La-Pr-Ce-Al alloy production test with the fertile magnificent novel material No. 58 60KA electrolyzer of limited-liability company's electrolytic aluminium factory (the aged groove of overhaul in 93 years) in Yanji Aluminum group company Jilin is example, and electrolysis process is identical with the general aluminium of electrolysis, i.e. NaF: AlF
3=3-3.1, electrolysis temperature 950-960 ℃, average current intensity 61600A, the current efficiency of the general aluminium of 1-7 month electrolysis in 2000 is 87.3%, the alternating-current unit consumption is 15917Kwh/tAl, daily output aluminium 433kg.Produce La-Pr-Ce-Al alloy from February in August, 2000 to calendar year 2001, content of rare earth is 0.2-0.4% (weight), apparent current efficiency average out to 89.82%, and the alternating-current unit consumption is 15516Kwh/tAl average daily production 445.3kg; The current efficiency that is the electrolysis La-Pr-Ce-Al alloy improves 2.52 percentage points than the general aluminium of electrolysis, alternating-current unit consumption decline 401Kwh/tAl, and day output has improved 12.3 kilograms.
2, as the test technology condition of embodiment 1
With No. 52 60KA aluminium cell of the fertile magnificent novel material limited-liability company in Yanji Aluminum group company Jilin is comparison groove (electrolyzer is identical with No. 58 Thoughss with other processing condition and technical indicator age), in February in August, 2000 to calendar year 2001, the mean current efficient of electrolytic production of aluminum is 86.38%, the alternating-current unit consumption is 15930Kwh/tAl, have a daily output of 428.8 kilograms, and the current efficiency of the La-Pr-Ce-Al alloy of No. 58 Thoughs electrolysis production same period (containing lanthanum praseodymium cerium mischmetal 0.25-0.4%) is 89.82%, the alternating-current unit consumption is 15516Kwh/tAl, daily output La-Pr-Ce-Al alloy 445.3kg, the apparent current efficiency that is the electrolysis production La-Pr-Ce-Al alloy improves 3.44 percentage points than comparison groove, ac consumption reduces 414Kwh/tAl, day volume increase 17kg, economic benefit is obvious.
Claims (3)
1, a kind of La-Pr-Ce-Al alloy is characterized in that: % counts by weight, and the lpc rare-earth mixture total amount is 0.15-0.5, and all the other are aluminium.
Wherein, lanthanum praseodymium cerium mischmetal partition is:
Lanthanum/mishmetal (La/RE) 88-93%
Praseodymium/mishmetal (Pr/RE) 5-10%
Cerium/mishmetal (Ce/RE) 2-10%
Neodymium/mishmetal (Nd/RE) 0.01-1%
2, a kind of La-Pr-Ce-Al alloy is characterized in that: % counts by weight, and the lpc rare-earth mixture total amount is 6-8, and all the other are aluminium.
Wherein, lanthanum praseodymium cerium mischmetal partition is:
Lanthanum/mishmetal (La/RE) 88-93%
Praseodymium/mishmetal (Pr/RE) 5-10%
Cerium/mishmetal (Ce/RE) 2-10%
Neodymium/mishmetal (Nd/RE) 0.01-1%
3, the manufacture method of La-Pr-Ce-Al alloy as claimed in claim 1 or 2, its production technique is to add lanthanum praseodymium cerium carbonated rare earth in industrial aluminum electrolysis bath, it is characterized in that: the carbonate of remaining lanthanum praseodymium and a small amount of cerium behind cerium that the extraction product marketing is good and the neodymium, its chemical ingredients is the % meter by weight, is expressed as follows:
REO 48-52
SO
4 2- ＜0.03
PO
4 3- ＜0.01
REO middle-weight rare earths partition is:
La
2O
3/REO ＞88
Pr
6O
11/REO 5-10
CeO
2/REO 2-10
Nd
2O
3/REO ＜1。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011125845A CN1147605C (en) | 2001-04-11 | 2001-04-11 | La-Pr-Ce-Al alloy and its production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011125845A CN1147605C (en) | 2001-04-11 | 2001-04-11 | La-Pr-Ce-Al alloy and its production process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1318650A CN1318650A (en) | 2001-10-24 |
| CN1147605C true CN1147605C (en) | 2004-04-28 |
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ID=4659348
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011125845A Expired - Fee Related CN1147605C (en) | 2001-04-11 | 2001-04-11 | La-Pr-Ce-Al alloy and its production process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1332052C (en) * | 2005-05-17 | 2007-08-15 | 郑州大学 | Multielement micro alloyed aluminium alloy containing titanium boron rare earth and its manufacturing method |
| CN101724769B (en) * | 2008-10-13 | 2012-03-28 | 北京有色金属研究总院 | Rare earth aluminum alloy, and method and device for preparing same |
| CN112410603A (en) * | 2020-11-05 | 2021-02-26 | 湖南森科有色金属有限公司 | Aluminum alloy additive |
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2001
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