CN102876898A - Method and system for treatment of return scraps produced from rare-earth hydrogen storage alloy smelting process - Google Patents
Method and system for treatment of return scraps produced from rare-earth hydrogen storage alloy smelting process Download PDFInfo
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- CN102876898A CN102876898A CN2012103693012A CN201210369301A CN102876898A CN 102876898 A CN102876898 A CN 102876898A CN 2012103693012 A CN2012103693012 A CN 2012103693012A CN 201210369301 A CN201210369301 A CN 201210369301A CN 102876898 A CN102876898 A CN 102876898A
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P10/20—Recycling
Abstract
A method for treatment of return scraps produced from a rare-earth hydrogen storage alloy smelting process is characterized by including the implementation steps: collecting: collecting smelted return scraps after each heat; smelting: taking the collected return scraps of a first predetermined amount, adding rare-earth raw materials of a second predetermined amount, and placing the return scraps and the rare-earth raw materials into a smelting furnace for smelting again; detecting: after smelting, collecting alloy cast in an ingot template, placing the alloy into a designated container, taking a small quantity of sample and detecting components of the sample; and re-smelting: compounding the alloy obtained by smelting the return scraps again with other required raw materials according to pre-designed alloy components and the detected alloy components, and placing the mixture into the smelting furnace for smelting, so that a smelted alloy product with required components is obtained finally. By the method, resources can be saved, production cost is reduced, and final performances of the alloy are unaffected.
Description
Technical field
The present invention relates to a kind for the treatment of process of returns of rare earth hydrogen storage alloy fusion process output, the invention still further relates to a kind for the treatment of system of returns of rare earth hydrogen storage alloy fusion process output.
Term " returns " refers to remain in the alloy of rare earth hydrogen storage alloy output when fusion process finishes a part of alloy on smelting furnace crucible bottom or the tundish.
Background technology
At present, when rare earth hydrogen storage alloy finishes at fusion process, in the alloy of output, except major part is poured into alloy in the ingot mould plate, some alloy remains on smelting furnace crucible bottom or the tundish, and we are referred to as " returns " with this alloy part.
Owing to returns are sneaked into the composition that impurity in the crucible or in the tundish affects alloy easily when collecting, returns are directly sneaked in the alloy in the ingot mould plate the directly performance of the final alloy product of impact.
And, because accounting for, returns weight is poured into 0.2%～1.5% of the interior alloy total amount of ingot mould plate, contain multiple valuable element in the returns, if do not process returns, will cause the waste of resource and the raising of production cost.
Summary of the invention
The treatment process and the system that the purpose of this invention is to provide a kind of returns of rare earth hydrogen storage alloy fusion process output, residual returns when it is processed rare earth hydrogen storage alloy fusion process and finishes, can economize on resources, reduce production costs, and not affect the final performance of alloy.
For this reason, according to an aspect of the present invention, provide a kind for the treatment of process of returns of rare earth hydrogen storage alloy fusion process output, it is characterized in that the implementation step of described treatment process is as follows:
Collect: the melting returns of collecting each heat;
Melting: get the returns that the first predetermined amount is collected, and the rare earth class raw material that adds the second predetermined amount is positioned over and re-starts melting in the smelting furnace;
Detect: after melting finishes, the alloy collection that casts in the ingot mould plate is left in the container of appointment, and take out a small amount of sample, the composition of test sample;
Again melting: according to detected alloying constituent, according to pre-designed alloying constituent, the alloy behind the returns again melting is prepared burden with other raw materials of needs, and put into smelting furnace and carry out melting, finally obtain the molten alloy product of required composition.
Preferably, returns again in the alloying constituent after the melting contained element be among La, Ce, Pr, Nd, Ni, Co, Mn, Al, Cu, Mg, the Fe one or more.
Preferably, collect in the melting returns Unified Set of each heat and be placed on FX.
Preferably, the ratio of the first predetermined amount and the second predetermined amount is 6: 1.
Preferably, the first predetermined amount is 300kg, and the second predetermined amount is 50kg.
Preferably, described rare earth class raw material comprises at least a in lanthanum, lanthanum cerium alloy or the mishmetal raw material.
Preferably, use the composition of ICP means test sample.
Preferably, the weight of described a small amount of sample is 25kg, and the weight of described other raw materials is 475kg.
According to another aspect of the present invention, provide a kind for the treatment of system of returns of rare earth hydrogen storage alloy fusion process output, it is characterized in that: described system comprises:
Collection device, it collects the melting returns of each heat;
The first smelting apparatus, the downstream that it is arranged on collection device holds returns that the first predetermined amount collects and the rare earth class raw material of the second predetermined amount;
Proofing unit, it detects the composition that casts in the alloy sample in the ingot mould plate after melting finishes;
The second smelting apparatus, it holds and melting returns other raw materials of the alloy after the melting and needs again, finally obtains the molten alloy product of required composition.
Preferably, the first smelting apparatus and the second smelting apparatus are same devices.
According to the present invention, residual returns can economize on resources, reduce production costs when processing the end of rare earth hydrogen storage alloy fusion process, and do not affect the final performance of alloy.
Description of drawings
Fig. 1 is the processing technological flow figure according to the returns of rare earth hydrogen storage alloy fusion process output of the present invention.
Fig. 2 is the treatment system synoptic diagram according to the returns of rare earth hydrogen storage alloy fusion process output of the present invention.
Embodiment
Further set forth the present invention below in conjunction with specific embodiment.
Alloy 1 collection that each heat is remained on smelting furnace crucible bottom or the tundish is positioned in the zone of sign.
When the quantity of collecting reaches 300kg when above, take out the returns 300kg in the identified areas, add the lanthanoid metal 2 of 50kg, both are positioned in the smelting furnace 3 and re-start melting.
After melting finishes, with the alloy that casts in the ingot mould plate, namely returns again the alloy 4 after the melting collect and leave in the zone of appointment, and take out a small amount of sample, detect each element kind and weight percent thereof in the sample with ICP detection means 5.
For example, the concrete data of one of them embodiment see Table 1.
Table 1
| Element | La | Ce | Ni | Co | Mn | Al | Cu |
| Detected value (%) | 23.40 | 8.67 | 55.05 | 3.23 | 7.14 | 1.13 | 1.38 |
According to the alloying constituent in the table 1, according to pre-designed alloying constituent, get returns again the alloy 4 (for example 25kg) after the melting with other raw materials 6 batchings of 475kg, and put into smelting furnace 7 and again carry out melting, finally obtain the molten alloy product basically identical with default composition, for example, the concrete data of one of them embodiment see Table 2.
Table 2
The implementation step of described treatment process of the present invention is as follows:
(1) collects: the returns of each heat of melting are collected, and be placed on FX in the Unified Set.
(2) melting: get the good returns of a certain amount of collection, and add a certain amount of rare earth class raw material (comprise in the raw materials such as lanthanoid metal, lanthanum cerium alloy or mishmetal at least a) and be positioned over and re-start melting in the smelting furnace.
(3) detect: after melting finishes, the alloy collection that casts in the ingot mould plate is left in the container of appointment, and take out a small amount of sample, with the composition of ICP means or other chemical process test sample.
(4) again melting: according to (3) detected alloying constituent, according to pre-designed alloying constituent, alloy behind the returns again melting is prepared burden with other raw materials of needs, and put into smelting furnace and carry out melting, finally obtain the molten alloy product of required composition.
Preferably, in the described treatment process implementation step returns again in the alloying constituent after the melting contained element be among La, Ce, Pr, Nd, Ni, Co, Mn, Al, Cu, Mg, the Fe one or more.
Relation between " pre-designed alloying constituent " and " returns are the alloy after the melting again ", " other raw materials that need ":
Known: n kind element is arranged in the pre-designed alloying constituent, and weight percent corresponding to this n kind element is respectively x
1, x
2, x
3..., x
n, pre-designed alloy gross weight is m;
Returns again in the alloying constituent after the melting weight percent of corresponding said n kind element be respectively a
1, a
2, a
3..., a
n, the returns again alloy predetermined weight after the melting are u;
Suppose: the weight percent of corresponding said n kind element is respectively b in other material compositions that need
1, b
2, b
3..., b
n, other raw material gross weights that need are v; Following relation is then arranged:
m=u+v
x
1×m=a
1×u+b
1×v
x
2×m=a
2×u+b
2×v
x
3×m=a
3×u+b
3×v
···
x
n×m=a
n×u+b
n×v
Can calculate the weight percent of each element in other material compositions that need according to above-mentioned formula.
Put into smelting furnace carry out melting need to be through vacuumizing, be filled with the processes such as rare gas element, heating, casting, cooling, vacuumize, be filled with the rare gas element process need and be controlled under the specific vacuum degree condition, the process needs such as heating, casting, cooling are controlled under specific time, the power condition.
Claims (10)
1. the treatment process of the returns of a rare earth hydrogen storage alloy fusion process output is characterized in that, preferably, the implementation step of described treatment process is as follows:
Collect: the melting returns of collecting each heat;
Melting: get the returns that the first predetermined amount is collected, and add the rare earth class raw material of the second predetermined amount, be positioned over and re-start melting in the smelting furnace;
Detect: after melting finishes, the alloy collection that casts in the ingot mould plate is left in the container of appointment, and take out a small amount of sample, the composition of test sample;
Again melting: according to detected alloying constituent, according to pre-designed alloying constituent, the alloy behind the returns again melting is prepared burden with other raw materials of needs, and put into smelting furnace and carry out melting, finally obtain the molten alloy product of required composition.
2. treatment process according to claim 1 is characterized in that: preferably, returns again in the alloying constituent after the melting contained element be among La, Ce, Pr, Nd, Ni, Co, Mn, Al, Cu, Mg, the Fe one or more.
According to claim 1 with 2 described treatment processs, it is characterized in that: preferably, collect in the melting returns Unified Set of each heat and be placed on FX.
4. according to claim 1 to 3 one of them described treatment process, it is characterized in that: the ratio of the first predetermined amount and the second predetermined amount is 6: 1.
5. according to claim 1 to 4 one of them described treatment process, it is characterized in that: the first predetermined amount is 300kg, and the second predetermined amount is 50kg.
6. according to claim 1 to 5 one of them described treatment process, it is characterized in that: described rare earth class raw material comprises at least a in lanthanum, lanthanum cerium alloy or the mishmetal raw material.
7. according to claim 1 to 6 one of them described treatment process, it is characterized in that: with the composition of ICP means test sample.
8. according to claim 1 to 7 one of them described treatment process, it is characterized in that: the weight of described a small amount of sample is 25kg, and the weight of described other raw materials is 475kg.
9. the treatment system of the returns of a rare earth hydrogen storage alloy fusion process output, it is characterized in that: described system comprises: collection device, it collects the melting returns of each heat; The first smelting apparatus, the downstream that it is arranged on collection device holds returns that the first predetermined amount collects and the rare earth class raw material of the second predetermined amount; Proofing unit, it detects the composition that casts in the alloy sample in the ingot mould plate after melting finishes; And second smelting apparatus, it holds and melting returns other raw materials of the alloy after the melting and needs again, finally obtains the molten alloy product of required composition.
10. treatment system according to claim 9, it is characterized in that: the first smelting apparatus and the second smelting apparatus are same devices.
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Citations (6)
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| CN1295355A (en) * | 2000-12-19 | 2001-05-16 | 南开大学 | Regeneration method of deactivated negative alloy powder of secondary nickel-hydrogen battery |
| CN1932054A (en) * | 2006-10-21 | 2007-03-21 | 内蒙古科技大学 | Process of extracting RE-Ni-Co alloy from waste hydrogen-storing RE alloy |
| CN101792862A (en) * | 2010-03-12 | 2010-08-04 | 兰州理工大学 | Method for recovering metal through purified flue gas of scrap nickel-hydrogen battery |
| CN101921933A (en) * | 2010-06-03 | 2010-12-22 | 怡球金属资源再生（中国）股份有限公司 | High-purity stabilized aluminum alloy ingot and production method thereof |
| CN102181646A (en) * | 2011-04-08 | 2011-09-14 | 内蒙古科技大学 | Comprehensive recycle and utilization method based on selective oxidation/ reduction rare earth nickel-metal hydride battery waste |
| CN202808922U (en) * | 2012-09-27 | 2013-03-20 | 江西稀有稀土金属钨业集团有限公司 | Treating system for return scraps produced in rear earth hydrogen storage alloy smelting process |
-
2012
- 2012-09-27 CN CN2012103693012A patent/CN102876898A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295355A (en) * | 2000-12-19 | 2001-05-16 | 南开大学 | Regeneration method of deactivated negative alloy powder of secondary nickel-hydrogen battery |
| CN1932054A (en) * | 2006-10-21 | 2007-03-21 | 内蒙古科技大学 | Process of extracting RE-Ni-Co alloy from waste hydrogen-storing RE alloy |
| CN101792862A (en) * | 2010-03-12 | 2010-08-04 | 兰州理工大学 | Method for recovering metal through purified flue gas of scrap nickel-hydrogen battery |
| CN101921933A (en) * | 2010-06-03 | 2010-12-22 | 怡球金属资源再生（中国）股份有限公司 | High-purity stabilized aluminum alloy ingot and production method thereof |
| CN102181646A (en) * | 2011-04-08 | 2011-09-14 | 内蒙古科技大学 | Comprehensive recycle and utilization method based on selective oxidation/ reduction rare earth nickel-metal hydride battery waste |
| CN202808922U (en) * | 2012-09-27 | 2013-03-20 | 江西稀有稀土金属钨业集团有限公司 | Treating system for return scraps produced in rear earth hydrogen storage alloy smelting process |
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Application publication date: 20130116 |