CN101850419B - Method of reducing agglomeration of electrolytic nickel powder - Google Patents
Method of reducing agglomeration of electrolytic nickel powder Download PDFInfo
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- CN101850419B CN101850419B CN2010102038486A CN201010203848A CN101850419B CN 101850419 B CN101850419 B CN 101850419B CN 2010102038486 A CN2010102038486 A CN 2010102038486A CN 201010203848 A CN201010203848 A CN 201010203848A CN 101850419 B CN101850419 B CN 101850419B
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- nickel powder
- electrolytic nickel
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- agglomeration
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Abstract
The invention relates to a method of reducing agglomeration of electrolytic nickel powder, in particular to a method of treating nickel powder produced in electrolysis, which comprises the following steps: (1) drying electrolytic nickel powder prepared in electrolysis; (2) continuously reducing the dried electrolytic nickel powder with a steel belt furnace under the reduction atmosphere of mixed gas of nitrogen and hydrogen prepared through decomposition of liquid ammonia; and (3) screening the reduced nickel powder. The method is characterized in that ammonium bicarbonate is added in the electrolytic nickel powder during the reduction process. Since the ammonium bicarbonate added in the electrolytic nickel powder during the reduction process can be decomposed into ammonia and carbon dioxide when being heated in the method, the electrolytic nickel powder can be puffed, thereby reducing the agglomeration of the electrolytic nickel powder. Moreover, no residue can be generated after decomposition of the ammonium bicarbonate, and thus the properties of the electrolytic nickel powder can not be changed. The method provided by the invention can reduce the oversized powder in the electrolytic nickel powder by 2-15 percent, and has the advantages of simple operation and obvious effect.
Description
Technical field
A kind of method that reduces agglomeration of electrolytic nickel powder relates to a kind of processing method of nickel powder of electrolysis production.
Background technology
Electrolytic nickel powder is widely used in atomic energy industry, alkaline storage battery, electrical alloy, superalloy, catalyst and additive for powder metallurgy.Because the assorted material that the raw material of electrolytic nickel powder adopts pure nickel plate or pure nickel plate to add minor amount of nickel is produced by electrolysis, not only purity is higher, and the microscopic appearance of the nickel powder of output is flourishing dendroid, has satisfied the demand of industries such as powdered metal parts.In process of production, the nickel powder after the electrolysis will be handled through super-dry, reduction after washing.Because the microscopic appearance of electrolytic nickel powder own is flourishing dendroid, easily shrink when at high temperature reducing and reunite, when screening, enter naturally in the plus sieve, reduced powder formation rate, and plus sieve has increased cost when handling once more.
Summary of the invention
The objective of the invention is deficiency, provide a kind of and can effectively solve the problem that easily contraction is reunited when reducing, powder formation rate is low, effectively reduce production costs, reduce the method for the reduction agglomeration of electrolytic nickel powder of apparent density at above-mentioned prior art existence.
The objective of the invention is to be achieved through the following technical solutions.
A kind of method that reduces agglomeration of electrolytic nickel powder, its process comprises:
(1) electrolytic nickel powder that electrolysis is produced is carried out drying;
(2) adopt the steel band reduction furnace to reduce continuously dried electrolytic nickel powder, reducing atmosphere is to adopt the nitrogen after liquefied ammonia decomposes and the mist of hydrogen;
(3) nickel powder after will reducing sieves;
It is characterized in that in electrolytic nickel powder, adding carbonic hydroammonium in described reduction process.
A kind of method that reduces agglomeration of electrolytic nickel powder of the present invention, the addition that it is characterized in that described interpolation carbonic hydroammonium is the 1%-5% of electrolytic nickel powder weight.
A kind of method that reduces agglomeration of electrolytic nickel powder of the present invention is characterized in that described carbonic hydroammonium is food-grade.
A kind of method that reduces agglomeration of electrolytic nickel powder of the present invention adds carbonic hydroammonium in the electrolytic nickel powder reduction process, the carbonic hydroammonium decomposes is ammonia and carbon dioxide, thereby electrolytic nickel powder is played fluffy effect, reduces the reunion of this process electrolytic nickel powder.And carbonic hydroammonium does not have residue after decomposing, and can not produce the character of electrolytic nickel powder to change.Adopt method of the present invention, can make the plus sieve of electrolytic nickel powder reduce 2%-15%.This method is simple to operate, and effect is obvious.
The specific embodiment
A kind of method that reduces agglomeration of electrolytic nickel powder, its process comprises: the electrolytic nickel powder that (1) produces electrolysis is carried out drying; (2) will add carbonic hydroammonium in the dried electrolytic nickel powder, electrolytic nickel powder adopts the steel band reduction furnace to reduce, and the nickel powder after the nitrogen after reducing atmosphere employing liquefied ammonia decomposes and the mist (3) of hydrogen will reduce sieves.
A kind of method that reduces agglomeration of electrolytic nickel powder of the present invention, the addition of described interpolation carbonic hydroammonium is the 1%-5% of electrolytic nickel powder weight, its carbonic hydroammonium is food-grade.
Embodiment 1
From getting 50kg the dried electrolytic nickel powder, at reduction temperature 500 ℃ (setting), adopt the steel band stoves to reduce continuously, reducing atmosphere is the nitrogen after liquefied ammonia decomposes and the mist of hydrogen.The condition of reduction furnace is driving motor frequency 12Hz, nickel powder fabric thickness 25mm (mechanical cloth).The reduction back is revolved to shake with 250 orders and is sieved, and measuring the plus sieve rate is 18.7%.
Get 50kg from same batch of dried electrolytic nickel powder, add carbonic hydroammonium 0.5kg, stir, reduce under above-mentioned equal reducing condition, the reduction back is revolved to shake with 250 orders and is sieved, and measuring the plus sieve rate is 16.5%.
Embodiment 2
Get 50kg from same batch of dried electrolytic nickel powder, add carbonic hydroammonium 1.0kg, stir, reduce under above-mentioned equal reducing condition, the reduction back is revolved to shake with 250 orders and is sieved, and measuring the plus sieve rate is 11.3%.
Embodiment 3
Get 50kg from same batch of dried electrolytic nickel powder, add carbonic hydroammonium 2.0kg, stir, reduce under above-mentioned equal reducing condition, the reduction back is revolved to shake with 250 orders and is sieved, and measuring the plus sieve rate is 7.9%.
Embodiment 4
Get 50kg from same batch of dried electrolytic nickel powder, add carbonic hydroammonium 0.5kg, stir, reduce under above-mentioned equal reducing condition, the reduction back is revolved to shake with 250 orders and is sieved, and measuring the plus sieve rate is 4.1%.
Claims (2)
1. method that reduces agglomeration of electrolytic nickel powder, its process comprises:
(1) electrolytic nickel powder that electrolysis is produced is carried out drying;
(2) adopt the steel band reduction furnace to reduce continuously dried electrolytic nickel powder, reducing atmosphere is the nitrogen after liquefied ammonia decomposes and the mist of hydrogen;
(3) nickel powder after will reducing sieves;
It is characterized in that in electrolytic nickel powder, adding carbonic hydroammonium in described reduction process; The addition of described interpolation carbonic hydroammonium is the 1%-5% of electrolytic nickel powder weight.
2. a kind of method that reduces agglomeration of electrolytic nickel powder according to claim 1 is characterized in that described carbonic hydroammonium is food-grade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102038486A CN101850419B (en) | 2010-06-18 | 2010-06-18 | Method of reducing agglomeration of electrolytic nickel powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102038486A CN101850419B (en) | 2010-06-18 | 2010-06-18 | Method of reducing agglomeration of electrolytic nickel powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101850419A CN101850419A (en) | 2010-10-06 |
| CN101850419B true CN101850419B (en) | 2011-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102038486A Active CN101850419B (en) | 2010-06-18 | 2010-06-18 | Method of reducing agglomeration of electrolytic nickel powder |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103866351B (en) * | 2012-12-14 | 2017-04-19 | 重庆有研重冶新材料有限公司 | Electrolytic preparation method of nickel powder |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4385457B2 (en) * | 1999-11-19 | 2009-12-16 | 堺化学工業株式会社 | Method for producing fine spherical metal nickel fine powder |
| JP2001247903A (en) * | 1999-12-28 | 2001-09-14 | Mitsui Mining & Smelting Co Ltd | Nickel powder, electrically conductive paste and method for producing nickel powder |
| US7169208B2 (en) * | 2004-06-10 | 2007-01-30 | Inco Limited | Method and composition for dispersing extra-fine nickel powder |
| KR100845688B1 (en) * | 2004-11-24 | 2008-07-11 | 삼성전기주식회사 | Method for Surface treatment of Ni nano particle with Organic solution |
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Owner name: JINCHUAN GROUP CO., LTD. Free format text: FORMER NAME: JINCHUAN GROUP CORP., LTD. |
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Address after: 737103 Jinchuan Road, Gansu, China, No. 98, No. Patentee after: Jinchuan Group Co., Ltd. Address before: 737103 Jinchuan Road, Gansu, China, No. 98, No. Patentee before: Jinchuan Group Corp., Ltd. |
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Effective date of registration: 20190228 Address after: 737100 No. 10 Beijing Road, Jinchuan District, Jinchang City, Gansu Province Patentee after: Jinchuan Group Powder Material Co., Ltd. Address before: No. 98 Jinchuan Road, Jinchang, Gansu Patentee before: Jinchuan Group Co., Ltd. |
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