CN1817525A - Production of high-purity nickel metal particle - Google Patents
Production of high-purity nickel metal particle Download PDFInfo
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- CN1817525A CN1817525A CN 200610065035 CN200610065035A CN1817525A CN 1817525 A CN1817525 A CN 1817525A CN 200610065035 CN200610065035 CN 200610065035 CN 200610065035 A CN200610065035 A CN 200610065035A CN 1817525 A CN1817525 A CN 1817525A
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Abstract
A process for preparing high-purity Ni particles includes such steps as proportionally mixing the vapor of carbonylnickel with CO gas to obtain mixed gas, filing it in decomposing reactor, adding hot small Ni particles as seeds at 200-400 deg.C to said decomposing reactor, thermally decomposing the carbonyl nickel while depositing the resultant Ni on the surface of seed for growing the seeds, and screening. Its advantages are high purity (99.99%) and high granularity uniformity.
Description
Technical field
A kind of method for preparing high-purity nickel metal particle relates to the method that a kind of carbonyl nickel thermal decomposition prepares high-purity nickel metal particle.
Background technology
The metallic nickel particle is applied in fields such as national defence, aviation, metallurgy, plating, new material industry widely with its high-purity, suitable profile and size.The production method of traditional nickel metallic particles (square or circular) mainly contains two kinds: the one, and adopt the method for machinery to be processed into the sheet nickel shearing of bulk square or irregularly shaped, the metallic particles that this method is produced is not of uniform size, out-of-shape, and sharp sword limit is arranged, use inconvenient.Another kind method is in the nickel electrowinning process, adopt special cathode plate, make the nickel metal at the pole plate local deposits circular particle of growing up, this technology has overcome the shortcoming that first method prepares the nickel metallic particles, but the cathode plate difficulty of processing is big, complex process, the life-span is short, cost is higher.And being subjected to the restriction of electrolysis process, the nickel metallic particles purity that above-mentioned two kinds of methods are produced is difficult to reach 99.99%.For this reason, need find a kind of new method for preparing the nickel metallic particles.
Summary of the invention
The objective of the invention is deficiency, provide a kind of and can prepare chemical purity height, smooth surface, even-grained nickel metallic particles at above-mentioned prior art existence, and the method for preparing high-purity nickel metal particle that technology is simple, production cost is low
Purpose of the present invention is achieved through the following technical solutions.
A kind of method for preparing high-purity nickel metal particle is characterized in that with carbonyl nickel steam and CO gas be raw material, will be mixed with mist in proportion, and mist is fed decomposer; Add decomposer after simultaneously the nickel shot in little footpath being heated to 200 ℃～400 ℃ as crystal seed, control decomposer pressure 1～100Kpa, carbonyl nickel is decomposed into metallic nickel when running into the crystal seed of heat, and be deposited on seed surface, the crystal seed nickel shot is constantly grown up to the particle diameter that requires, by screening, sort out the corresponding to nickel metallic particles of particle diameter again, do not meet the requirements of particle and return as crystal seed.
Crystal seed after the inventive method heating, selfdecomposition device top adds, and flows out from the bottom of decomposer.Mist selfdecomposition device bottom enters, and makes the crystal seed of heat and mist form adverse current; Decomposing the CO gas selfdecomposition device top that discharges draws.
In the mist of method of the present invention, the volume ratio that the carbonyl nickel steam mixes with CO gas is: 1: 5～60.
Method of the present invention, it is characterized in that adding crystal seed for spherical, equipment can hold and limits the quantity of when the amount of adding all generated required grain diameter less than crystal seed, according to the quantity of the finished product nickel particle of output, in time replenish new crystal seed to system, constant to keep in the system crystal seed sum.
The present invention adopts the mesh size that changes screening plant to realize in order to obtain the nickel metallic particles of different-grain diameter, just can obtain and the corresponding to nickel metallic particles of mesh size, adopts method of the present invention can obtain particle diameter 1mm～30mm nickel metallic particles.
Among the present invention, whole process of production is in closed system.Method of the present invention is carried out thermal decomposition to carbonyl nickel, and the technological parameter of control decomposable process makes metallic nickel be deposited on the nickel seed surface, and constantly deposition is grown up crystal seed.Adjust the aperture of screen cloth in the screening plant and can prepare the nickel metallic particles suitable with sieve diameter, product surface is smooth, regular shape, and epigranular.Metallic nickel content reaches 99.99% in the nickel metallic particles of preparing.The present invention has simplified technological process, has reduced production cost.
The specific embodiment
A kind of method for preparing high-purity nickel metal particle is characterized in that with carbonyl nickel steam and CO gas be raw material, will be mixed with mist in proportion, and mist is fed decomposer; Add decomposer after simultaneously the nickel shot in little footpath being heated to 200 ℃～400 ℃ as crystal seed, control decomposer pressure 1～100Kpa, carbonyl nickel is decomposed into metallic nickel when running into the crystal seed of heat, and be deposited on seed surface, the crystal seed nickel shot is constantly grown up to the particle diameter that requires, by screening, sort out the corresponding to nickel metallic particles of particle diameter again, do not meet the requirements of particle and return as crystal seed.
Embodiment 1
Selfdecomposition device top freely falls into decomposer the nickel crystal seed is preheating to 200 ℃ in heater after.With flow velocity is that the CO gas of the carbonyl nickel steam of 20L/min and 100L/min mixes the back and sprays into decomposer from the bottom, mist flow through fall hot crystal seed the time, carbonyl nickel wherein decomposites metallic nickel, and the metallic nickel deposition also is coated on seed surface, and crystal seed is grown up gradually.Nickel crystal seed after growing up drops to screening plant naturally, and the screening plant aperture is 1mm, then can sieve to obtain the nickel metallic particles that particle diameter is 0.8～1.2mm, and the nickel tenor reaches more than 99.99%.Particle diameter passes screen cloth less than the particle of 1mm, returns the decomposer top by the decomposer bottom by conveying device, continues circulation in system.Control decomposer pressure 50Kpa decomposes the CO gas that discharges and draws from the decomposer top.Replenished pure nickel powder in per 8 hours in heater and do crystal seed, it is consistent with the quantity of nickel metal finished product of output in 8 hours to add crystal seed quantity.
Embodiment 2
Selfdecomposition device top freely falls into decomposer the nickel crystal seed is preheating to 280 ℃ in heater after.With flow velocity is that the CO gas of the carbonyl nickel steam of 10L/min and 100L/min mixes from the bottom and sprays into decomposer, mist flow through fall hot crystal seed the time, carbonyl nickel wherein decomposites metallic nickel, and the metallic nickel deposition also is coated on seed surface, and crystal seed is grown up gradually.Nickel crystal seed after growing up drops to screening plant naturally, and the screening plant aperture is 5mm, then can sieve to obtain the nickel metallic particles that particle diameter is 4.8～5.2mm, and the nickel tenor reaches more than 99.99%.Particle diameter passes screen cloth less than the particle of 5mm, returns the decomposer top by the decomposer bottom by conveying device, continues circulation in system.Control decomposer pressure 1Kpa decomposes the CO gas that discharges and draws from the decomposer top.Replenished pure nickel powder in per 12 hours in heater and do crystal seed, it is consistent with the quantity of nickel metal finished product of output in 12 hours to add crystal seed quantity.
Embodiment 3
Selfdecomposition device top freely falls into decomposer the nickel crystal seed is preheating to 320 ℃ in heater after.With flow velocity is that the CO gas of the carbonyl nickel steam of 5L/min and 100L/min mixes the back and sprays into decomposer from the bottom, mist flow through fall hot crystal seed the time, wherein, carbonyl nickel decomposites metallic nickel, the metallic nickel deposition also is coated on seed surface, and crystal seed is grown up gradually.Nickel crystal seed after growing up drops to screening plant naturally, and the screening plant aperture is 10mm, then can sieve to obtain the nickel metallic particles that particle diameter is 9.5～10.5mm, and the nickel tenor reaches more than 99.99%.Particle diameter passes screen cloth less than the particle of 10mm, returns the decomposer top by the decomposer bottom by conveying device, continues circulation in system.Control decomposer pressure 100Kpa decomposes the CO gas that discharges and draws from the decomposer top.Replenished pure nickel powder in per 24 hours in heater and do crystal seed, it is consistent with the quantity of nickel metal finished product of output in 24 hours to add crystal seed quantity.
Embodiment 4
Selfdecomposition device top freely falls into decomposer the nickel crystal seed is preheating to 400 ℃ in heater after.With flow velocity is that the CO gas of the carbonyl nickel steam of 2L/min and 120L/min mixes from the bottom and sprays into decomposer, mist flow through fall hot crystal seed the time, carbonyl nickel wherein decomposites metallic nickel, and the metallic nickel deposition also is coated on seed surface, and crystal seed is grown up gradually.Nickel crystal seed after growing up drops to screening plant naturally, and the screening plant aperture is 20mm, then can sieve to obtain the nickel metallic particles that particle diameter is 19～21mm, and the nickel tenor reaches more than 99.99%.Particle diameter passes screen cloth less than the particle of 20mm, returns the decomposer top by the decomposer bottom by conveying device, continues circulation in system.Control decomposer pressure 60Kpa decomposes the CO gas that discharges and draws from the decomposer top.Replenished pure nickel powder in per 8 hours in heater and do crystal seed, it is consistent with the quantity of nickel metal finished product of output in 8 hours to add crystal seed quantity.
Claims (4)
1. a method for preparing high-purity nickel metal particle is characterized in that with carbonyl nickel steam and CO gas be raw material, will be mixed with mist in proportion, and mist is fed decomposer; Add decomposer after simultaneously the nickel shot in little footpath being heated to 200 ℃～400 ℃ as crystal seed, control decomposer pressure 1～100Kpa, carbonyl nickel is decomposed into metallic nickel when running into the crystal seed of heat, and be deposited on seed surface, the crystal seed nickel shot is constantly grown up to the particle diameter that requires, by screening, sort out the corresponding to nickel metallic particles of particle diameter again, do not meet the requirements of particle and return as crystal seed.
2. according to the described method of claim, the crystal seed after it is characterized in that heating, selfdecomposition device top adds, and flows out from the bottom of decomposer; Mist selfdecomposition device bottom enters, and makes the crystal seed of heat and mist form adverse current; Decomposing the CO gas selfdecomposition device top that discharges draws.
3. according to the described method of claim, it is characterized in that in the mist that the volume ratio that the carbonyl nickel steam mixes with CO gas is: 1: 5～30.
4. according to the described method of claim, it is characterized in that adding crystal seed for spherical, equipment can hold and limits the quantity of when the amount that adds all generated required grain diameter less than crystal seed, quantity according to the finished product nickel particle of output, in time replenish new crystal seed to system, constant to keep in the system crystal seed sum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610065035 CN1817525A (en) | 2006-03-17 | 2006-03-17 | Production of high-purity nickel metal particle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610065035 CN1817525A (en) | 2006-03-17 | 2006-03-17 | Production of high-purity nickel metal particle |
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| CN1817525A true CN1817525A (en) | 2006-08-16 |
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| CN 200610065035 Pending CN1817525A (en) | 2006-03-17 | 2006-03-17 | Production of high-purity nickel metal particle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104475761A (en) * | 2014-12-07 | 2015-04-01 | 金川集团股份有限公司 | Control method of carbon content of carbonyl nickel powder |
| CN106082362A (en) * | 2016-06-22 | 2016-11-09 | 金川集团股份有限公司 | A kind of method improving light-weight carbonyl nickel powder granularity |
| CN111115692A (en) * | 2020-02-14 | 2020-05-08 | 新昌宠信机械科技有限公司 | Wet preparation device for maintaining quality of same batch of iron oxide red |
-
2006
- 2006-03-17 CN CN 200610065035 patent/CN1817525A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104475761A (en) * | 2014-12-07 | 2015-04-01 | 金川集团股份有限公司 | Control method of carbon content of carbonyl nickel powder |
| CN106082362A (en) * | 2016-06-22 | 2016-11-09 | 金川集团股份有限公司 | A kind of method improving light-weight carbonyl nickel powder granularity |
| CN111115692A (en) * | 2020-02-14 | 2020-05-08 | 新昌宠信机械科技有限公司 | Wet preparation device for maintaining quality of same batch of iron oxide red |
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