CN101837459A - Preparation method of spherical metal powder and spherical nickel powder - Google Patents
Preparation method of spherical metal powder and spherical nickel powder Download PDFInfo
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- CN101837459A CN101837459A CN 201010197168 CN201010197168A CN101837459A CN 101837459 A CN101837459 A CN 101837459A CN 201010197168 CN201010197168 CN 201010197168 CN 201010197168 A CN201010197168 A CN 201010197168A CN 101837459 A CN101837459 A CN 101837459A
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Abstract
The invention provides a method for preparing spherical metal powder, in particular to nickel powder. Porous metal (nickel) serves as a raw material; after the porous metal (nickel) is broken, a direct ball milling mode or airflow grinding mode is adopted to grind the broken raw material powder to obtain spherical metal powder; and finally, the ground spherical metal powder is screened by stages to obtain spherical metal powder of which the grain diameter is 5-100 mu m. The preparation method of the invention has small energy consumption, simple equipment, high production efficiency, simple flow, environment protection and low cost and is easy to produce on a large scale, and the prepared spherical metal powder has high product purity, regular shape and even granularity.
Description
Technical field
The present invention relates to the preparation technology of metal powder, particularly the preparation method of spherical metal powder and globular powdered nickel.
Background technology
At present, be used to prepare spherical metal powder particularly the production method of globular powdered nickel mainly contain oxidation-reduction method, electrolysis, atomization, and the metal carbonyl method etc., wherein, the nickel powder pattern of electrolysis preparation is dendroid, there is bigger internal stress in powder particle itself, powder compaction is relatively poor, and the nickel powder oxygen content of atomization preparation is higher, and the nickel powder powder particle of carbonyl process preparation is tiny, but produce poisonous inorganic matter in the preparation process, cause serious environmental to pollute.The common powder combination property of nickel powder of oxidation-reduction method preparation is good, and oxygen content in power is lower, and in preparation process non-environmental-pollution.Be that raw material prepares metal powder at present with porous metals, have only oxidation-reduction method to realize, it is raw material that patent CN1234491C proposes to adopt porous metals, behind multi-stage oxidizing and multiple stage crushing, reduce again and handle to prepare the metallic nickel powder of 325 order particle sizes, but the method that this patent adopted needs multi-stage oxidizing and high temperature reduction, this technology is the energy consumption height not only, and powder reduces also not thorough under hot conditions, the technological process complexity, recovery utilization rate to metallic nickel is not high yet simultaneously, and the prepared nickel powder pattern of this technology is irregular, and difficulty is met the need of market.Above-mentioned various preparation method is chemical method substantially, so complex process, difficult control, cost height.
Summary of the invention
The present invention aims to provide the method for preparing spherical metal powder that a kind of technology is very simple, cost is very low, be suitable for suitability for industrialized production, the spherical metal powder pattern rule that makes, and particle diameter is evenly distributed, function admirable.
The present invention is achieved by following scheme: the employing porous metals are raw material; earlier raw material is broken into powder particle; afterwards; the one, adopt direct ball milling method under the protective atmosphere condition; or the material powder after adopting the air-flow lapping mode to fragmentation carries out attrition process and gets spherical metal powder; at last the spherical metal powder after the attrition process is carried out multistage sub-sieve, obtain the spherical metal powder that particle diameter is 5-100 μ m.
Described protective atmosphere is selected from nitrogen or the inert gas one or more, for reducing cost preferred nitrogen.
In ball-milling technology, it is the bead of 10-50mm identical with the feed metal composition or basic identical (promptly corresponding with feed metal) that the ball milling meson adopts diameter, and rotational speed of ball-mill is 200-500rpm.
In the air-flow grinding technics, the mist that adopts nitrogen or hydrogen and nitrogen is as moving gaseouse medium, gas pressure 0.7-1.0MPa.
This preparation method can adopt porous copper, porous iron, nickel porous ferroalloy, nickel porous tungsten alloy to wait to prepare corresponding spherical copper powder, iron powder, ferronickel powder, nickel tungsten powder etc.
Globular powdered nickel is the widest metal powder of purposes in the market; its preparation method is as follows: adopting the galvanic anode dissolved matter of porous-metal nickel or nickel is raw material; earlier the nickel raw material is broken into the particle of 1.0-3.0mm granule size; afterwards; the one, adopt direct ball milling method under the protective atmosphere condition; or adopt the air-flow lapping mode that the nickel raw meal is carried out attrition process to obtaining globular powdered nickel; at last the globular powdered nickel after grinding is carried out multistage sub-sieve, obtain the sphere metal nickel powder that particle diameter is 5-100 μ m.
Described protective atmosphere is selected from nitrogen or the inert gas one or more, for reducing cost preferred nitrogen.
In ball-milling technology, it is the nickel bead of 10-50mm that the ball milling meson adopts diameter, and rotational speed of ball-mill is 200-500rpm.
In the air-flow grinding technics, the mist that adopts nitrogen or hydrogen and nitrogen is as moving gaseouse medium, gas pressure 0.7-1.0MPa.
Compared with prior art, advantage applies of the present invention in: 1. what the present invention adopted is to be raw material with porous metals, directly carry out ball milling after the fragmentation, carry out the process of sub-sieve again, abandoned multi-stage oxidizing-fragmentation, at last Hai Yuan flow process, need not oxidation and pure physical method directly broken, the attrition process raw metal, it is little to have energy consumption, the production efficiency height, and flow process is simple, environmental protection, advantage with low cost.
2. adopt the prepared spherical metal powder of the present invention, product purity height, regular shape, epigranular.
3. preparation method of the present invention, equipment is simple, easily accomplishes scale production.
Description of drawings
Fig. 1: the sphere metal nickel powder SEM figure Fig. 2 that adopts the present invention's preparation: the metal nickel powder SEM figure of existing oxidative deamination process preparation
The specific embodiment
Embodiment 1 is that the nickel foam of 2.0mm is a raw material with thickness, and it puts into Hubei Province formula fragmentation shearing-crushing 20min with the 1kg nickel foam, makes it become the nickel powder material end particle that particle diameter is 1.8mm; Again nickel powder material end particle 0.98kg is put into high energy ball mill; the rotating speed of ball mill is 200rpm; adopting diameter is that the nickel bead of 20mm is as the ball milling meson; with purity be 99% nitrogen as protective atmosphere, ball milling 30min under the protective atmosphere condition carries out sub-sieve by the nickel powder of vibratory sieve after to ball milling then; having obtained particle diameter is the globular powdered nickel of 40 μ m; it accounts for 32% of globular powdered nickel gross mass, particle diameter be 60 μ m account for 54%, particle diameter be 72 μ m account for 14%.
The nickel powder that utilizes this technology and traditional oxidation-reduction method to prepare is observed the nickel powder pattern under the 500X Electronic Speculum, testing result as depicted in figs. 1 and 2.As can be known, adopt the prepared sphere metal nickel powder size of the present invention more even after the contrast, and spherical fairly regular.
Embodiment 2 adopts embodiment 1 essentially identical mode to prepare the high performance spherical nickel powder, and the process conditions different with it are as follows: collect the molten utmost point thing of galvanic anode of nickel as raw material 1.; 2. the ball milling meson adopts the 50mm nickel bead, and drum's speed of rotation is 300rpm; 3. the ball milling time is 400min.
4. protective atmosphere adopts inert nitrogen gas.
Zhi Bei globular powdered nickel is as stated above measured through behind the sub-sieve, particle diameter be the globular powdered nickel of 8 μ m account for the globular powdered nickel gross mass 51%, particle diameter be 18 μ m account for 26%, particle diameter be 32 μ m account for 23%.
Embodiment 3 is that the nickel foam of 10mm is a raw material with thickness, and the 1.5kg nickel foam is put into Hubei Province formula fragmentation shearing-crushing 120min, makes it become the raw material nickel particle that particle diameter is 2.0mm; Again raw material nickel particle 1.48kg is put into the air-flow grinder, its process conditions are as follows: adopt nitrogen as moving gaseouse medium, gas pressure 0.7MPa.By vibratory sieve the globular powdered nickel after grinding is carried out sub-sieve then.
Zhi Bei globular powdered nickel is as stated above measured through behind the sub-sieve, particle diameter be the globular powdered nickel of 25 μ m account for the globular powdered nickel gross mass 48%, particle diameter be 40 μ m account for 24%, particle diameter be 55 μ m account for 28%.
Embodiment 4 is that the foam copper of 2.0mm is a raw material with thickness, and it puts into Hubei Province formula fragmentation shearing-crushing 25min with the 1kg foam copper, makes it become the raw copper particle of 1.5mm particle diameter; Again raw copper particle 0.98kg is put into high energy ball mill; the rotating speed of ball mill is 380rpm; with diameter is that the copper pearl of 28mm is as the ball milling meson; as protective atmosphere, ball milling 360min under the protective atmosphere condition carries out sub-sieve by the globular powdered nickel of vibratory sieve after to ball milling then with mixed inert gas; having obtained particle diameter is 25 μ m spherical copper powders; it accounts for 58% of spherical copper powder gross mass, particle diameter be 20 μ m account for 23%, particle diameter be 18 μ m account for 19%.
Embodiment 5 is that the nickel foam ferroalloy of 8mm is a raw material with thickness, and 1kg foam iron-nickel alloy raw material is put into Hubei Province formula fragmentation shearing-crushing 55min, makes it become the raw material dilval particle of 2.3mm granule size; Again raw material dilval particle 0.98kg is put into the air-flow grinder, its process conditions are as follows: the mist that adopts hydrogen and nitrogen is as moving gaseouse medium, gas pressure 0.9MPa.By vibratory sieve the ferronickel powder after grinding is carried out sub-sieve then, having obtained particle diameter is the spherical ferronickel powders of 18 μ m, account for spherical ferronickel and close powder gross mass 39%, particle diameter be 16 μ m account for 55%, particle diameter be 15 μ m account for 6%.
Claims (10)
1. the preparation method of a spherical metal powder; it is characterized in that: the employing porous metals are raw material; earlier raw material is broken into powder; one is to adopt direct ball milling method under the protective atmosphere condition afterwards; or adopt the air-flow lapping mode that material powder is carried out attrition process to obtaining spherical metal powder; at last the spherical metal powder after the attrition process is carried out multistage sub-sieve, obtain the spherical metal powder that particle diameter is 5-100 μ m.
2. the preparation method of spherical metal powder as claimed in claim 1 is characterized in that: the protective atmosphere of described ball milling method is selected from nitrogen or the inert gas one or more.
3. the preparation method of spherical metal powder as claimed in claim 2 is characterized in that: described protective atmosphere preferred nitrogen.
4. as the preparation method of the described spherical metal powder of one of claim 1～3, it is characterized in that: in the ball-milling technology, the ball milling meson adopt diameter be 10-50mm with the corresponding bead of feed metal, rotational speed of ball-mill is 200-500rpm.
5. as the preparation method of the described spherical metal powder of one of claim 1～3, it is characterized in that: in the described air-flow grinding technics, the gaseous mixture that adopts nitrogen or hydrogen and nitrogen is as moving gaseouse medium, and gas pressure is 0.7-1.0MPa.
6. the preparation method of a sphere metal nickel powder; it is characterized in that: adopting the galvanic anode dissolved matter of porous-metal nickel or nickel is raw material; earlier the nickel raw material is broken into powder; one is to adopt direct ball milling method under the protective atmosphere condition afterwards; or attrition process is carried out to obtaining globular powdered nickel in the nickel powder material end after adopting the air-flow lapping mode to fragmentation; at last the globular powdered nickel after the attrition process is carried out multistage sub-sieve, obtain the sphere metal nickel powder that particle diameter is 5-100 μ m.
7. the preparation method of sphere metal nickel powder as claimed in claim 5 is characterized in that: the protective atmosphere in the described ball milling method is selected from nitrogen or the inert gas one or more.
8. the preparation method of spherical metal powder as claimed in claim 7 is characterized in that: described protective atmosphere preferred nitrogen.
9. as the preparation method of the described sphere metal nickel powder of one of claim 6～8, it is characterized in that: in the ball-milling technology, it is the nickel bead of 10-50mm that the ball milling meson adopts diameter, and rotational speed of ball-mill is 200-500rpm.
10. as the preparation method of the described spherical metal powder of one of claim 6～8, it is characterized in that: in the described air-flow grinding technics, the mist that adopts nitrogen or hydrogen and nitrogen is as moving gaseouse medium, gas pressure 0.7-1.0MPa.
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| CN 201010197168 CN101837459A (en) | 2010-06-10 | 2010-06-10 | Preparation method of spherical metal powder and spherical nickel powder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106041104A (en) * | 2016-06-23 | 2016-10-26 | 青岛理工大学 | Preparation method of fine metal powder coarsening |
| CN107225232A (en) * | 2017-05-25 | 2017-10-03 | 北京康普锡威科技有限公司 | A kind of preparation method of increasing material manufacturing metal dust |
| CN112979323A (en) * | 2021-02-07 | 2021-06-18 | 湖南恒基粉末科技有限责任公司 | Non-spherical nickel powder for toughening zirconia and preparation method and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1817516A (en) * | 2006-03-17 | 2006-08-16 | 金川集团有限公司 | Production of superfine cobalt powder by air-flow breaking process |
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2010
- 2010-06-10 CN CN 201010197168 patent/CN101837459A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1817516A (en) * | 2006-03-17 | 2006-08-16 | 金川集团有限公司 | Production of superfine cobalt powder by air-flow breaking process |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106041104A (en) * | 2016-06-23 | 2016-10-26 | 青岛理工大学 | Preparation method of fine metal powder coarsening |
| CN107225232A (en) * | 2017-05-25 | 2017-10-03 | 北京康普锡威科技有限公司 | A kind of preparation method of increasing material manufacturing metal dust |
| CN112979323A (en) * | 2021-02-07 | 2021-06-18 | 湖南恒基粉末科技有限责任公司 | Non-spherical nickel powder for toughening zirconia and preparation method and application thereof |
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Application publication date: 20100922 |