CN102009187A - Method for preparing rhombic nickel powder - Google Patents
Method for preparing rhombic nickel powder Download PDFInfo
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- CN102009187A CN102009187A CN 201010561205 CN201010561205A CN102009187A CN 102009187 A CN102009187 A CN 102009187A CN 201010561205 CN201010561205 CN 201010561205 CN 201010561205 A CN201010561205 A CN 201010561205A CN 102009187 A CN102009187 A CN 102009187A
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- decomposer
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Abstract
The invention provides a method for preparing rhombic nickel powder, relating to the method for preparing the nickel powder by thermal decomposition of carbonyl nickel. The preparing method comprises the following steps of: mixing carbonyl nickel steam with carbon monoxide gas to form a mixed gas; infusing the mixed gas from the upper part of a decomposer, wherein the pressure of the decomposer is controlled at 3-10 kPa, the temperature in the decomposer is divided into 6 sections of temperature zones from top to bottom, specifically the temperature of the first section and the second section is 250-280 DEG C, the temperature of the third section and the fourth section is 270-300 DEG C, and the temperature of the fifth section and the sixth section is 300-320 DEG C. The method of the invention has the advantages that the mixed gas which is composed of the carbonyl nickel steam and the carbon monoxide gas is infused into the decomposer for thermal decomposition; the temperature distribution and the pressure and the like parameters of the decomposer are controlled in the decomposition process,so as to finally obtain the nickel powder product with the microcosmic shape of rhombus and of which the average grain size range is 0.5-8 mum.
Description
Technical field
A kind of production method of rhombus nickel powder relates to the method that a kind of carbonyl nickel thermal decomposition prepares nickel powder.
Background technology
Carbonyl nickel powder is to adopt carbonyl nickel to decompose the nickel powder of producing.The ultra-fine carbonyl nickel powder of rhombus is a kind of powder-product with higher degree, decentralization, its uniform specification, and diamond structure, particularly each face that the surface is rule are groove in the knot place mutually, make this powder be highly suitable for powder metallurgy industry.At present, the technology of utilizing carbonyl nickel to decompose preparation rhombus nickel powder also is in confidential state, does not have referential carbonyl nickel to decompose the technology of preparation rhombus nickel powder.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists at above-mentioned prior art, and a kind of carbonyl nickel thermal decomposition principle of utilizing is provided, and control decomposer technological parameter obtains the production method of mean particle size range at the rhombus nickel powder of the rhombus pattern of 0.5～8 μ m.
The objective of the invention is to be achieved through the following technical solutions.
A kind of production method of rhombus nickel powder, its production process are that carbonyl nickel steam and CO gas are formed mist, and mist is fed by decomposer top; The pressure that it is characterized in that controlling decomposer is 3～10KPa, and control decomposer internal temperature forms six sections temperature bands from top to bottom, and wherein one, two section temperature is 250～280 ℃; Three, four sections temperature are 270～300 ℃; Five, 6 two sections temperature are 300～320 ℃.
The production method of a kind of rhombus nickel powder of the present invention is characterized in that the volume ratio of the mist that carbonyl nickel steam and carbon monoxide are formed is 1: 1～4.
The production method of a kind of rhombus nickel powder of the present invention, carbonyl nickel steam in the mist enters decomposer, meet heat and begin to decompose the generation metallic nickel, and in decomposer, fall from top to bottom, in dropping process, newly-generated metallic nickel nucleus is also constantly grown up, and be subjected to control of process parameters to form the nickel powder particle that particle diameter is 0.5～8 μ m gradually, and particle assumes diamond in shape.Method of the present invention is carried out thermal decomposition process at carbonyl nickel, and the technological parameter of strict control decomposable process makes the rhombus of metallic nickel nucleus formation rule, and constantly grows up, and can prepare the nickel powder of particle mean size at 0.5～8 μ m.
The specific embodiment
A kind of production method of rhombus nickel powder, its production process are that carbonyl nickel steam and CO gas are formed mist, and the volume ratio of carbonyl nickel steam and Co mixed gas is 1: 1～4, and mist is fed by decomposer top; The pressure of control decomposer is 3～10KPa, and control decomposer internal temperature forms six sections temperature bands from top to bottom, and wherein one, two section temperature is 250～280 ℃; Three, four sections temperature are 270～300 ℃; Five, 6 two sections temperature are 300～320 ℃.
Embodiment 1
The control decomposer forms six temperature sections from top to bottom, wherein one, two section temperature: 250～300 ℃; Three, four sections temperature: 270～310 ℃; Five, six sections temperature: 300～330 ℃.Is that 1900～2000L/min CO gas feeds mixing channel with flow at carbonyl nickel steam and the flow of 1900～2000L/min, makes carbonyl nickel steam and CO gas form mist with 1: 1 proportioning.This mist is fed in the decomposer, the pressure of keeping in the decomposer is 3～10KPa again.It is 0.5～8.0 μ m that carbonyl nickel in the mist begins to decompose and obtain particle mean size, and microscopic appearance is the carbonyl nickel powder of rhombus.
Embodiment 2
The control decomposer forms six temperature sections from top to bottom, wherein one, two section temperature: 250～280 ℃; Three, four sections temperature: 270～300 ℃; Five, six sections temperature: 300～320 ℃.Is that 3400～3600L/min CO gas feeds mixing channel with flow at carbonyl nickel steam and the flow of 1700～1800L/min, makes carbonyl nickel steam and CO gas form mist with 1: 2 proportioning.This mist is fed in the decomposer, the pressure of keeping in the decomposer is 5.0～10.0KPa again.It is 0.5～8.0 μ m that carbonyl nickel in the mist begins to decompose and obtain particle mean size, and microscopic appearance is the carbonyl nickel powder of rhombus.
Embodiment 3
The control decomposer forms six temperature sections from top to bottom, wherein one, two section temperature: 240～270 ℃; Three, four sections temperature: 250～280 ℃; Five, six sections temperature: 280～300 ℃.Is that 4500～4800L/min CO gas feeds mixing channel with flow at carbonyl nickel steam and the flow of 1500～1600L/min, makes carbonyl nickel steam and CO gas form mist with 1: 3 proportioning.This mist is fed in the decomposer, the pressure of keeping in the decomposer is 7～10.0KPa again.It is 0.5～8.0 μ m that carbonyl nickel in the mist begins to decompose and obtain particle mean size, and microscopic appearance is the carbonyl nickel powder of rhombus.
Embodiment 4
The control decomposer forms six temperature sections from top to bottom, wherein one, two section temperature: 260～280 ℃; Three, four sections temperature: 280～300 ℃; Five, six sections temperature: 300～320 ℃.Is that 5600～6000L/min CO gas feeds mixing channel with flow at carbonyl nickel steam and the flow of 1400～1500L/min, makes carbonyl nickel steam and CO gas form mist with 1: 4 proportioning.This mist is fed in the decomposer, the pressure of keeping in the decomposer is 8.0～10.0KPa again.It is 0.5～8.0 μ m that carbonyl nickel in the mist begins to decompose and obtain particle mean size, and microscopic appearance is the carbonyl nickel powder of rhombus.
Claims (2)
1. the production method of a rhombus nickel powder, its production process are that carbonyl nickel steam and CO gas are formed mist, and mist is fed by decomposer top; The pressure that it is characterized in that controlling decomposer is 3～10KPa, and control decomposer internal temperature forms six sections temperature bands from top to bottom, and wherein one, two section temperature is 250～280 ℃; Three, four sections temperature are 270～300 ℃; Five, 6 two sections temperature are 300～320 ℃.
2. the production method of a kind of rhombus nickel powder according to claim 1 is characterized in that the volume ratio of the mist that carbonyl nickel steam and carbon monoxide are formed is 1: 1～4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010561205 CN102009187A (en) | 2010-11-23 | 2010-11-23 | Method for preparing rhombic nickel powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010561205 CN102009187A (en) | 2010-11-23 | 2010-11-23 | Method for preparing rhombic nickel powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102009187A true CN102009187A (en) | 2011-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 201010561205 Pending CN102009187A (en) | 2010-11-23 | 2010-11-23 | Method for preparing rhombic nickel powder |
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| CN (1) | CN102009187A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104551013A (en) * | 2014-12-07 | 2015-04-29 | 金川集团股份有限公司 | Method for controlling particle size of carbonyl iron powder during decomposition process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1603037A (en) * | 2003-09-29 | 2005-04-06 | 中国科学院兰州化学物理研究所 | Method for preparing superfine nickel carbonyl powder by nickel carbonyl thermal decomposition |
| CN1817527A (en) * | 2006-03-17 | 2006-08-16 | 金川集团有限公司 | Production of spherical nickel powder |
| CN1817526A (en) * | 2006-03-17 | 2006-08-16 | 金川集团有限公司 | Production of dendritic superfine nickle powder |
| CN1817528A (en) * | 2006-03-17 | 2006-08-16 | 金川集团有限公司 | Production of spherical superfine nickel powder |
-
2010
- 2010-11-23 CN CN 201010561205 patent/CN102009187A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1603037A (en) * | 2003-09-29 | 2005-04-06 | 中国科学院兰州化学物理研究所 | Method for preparing superfine nickel carbonyl powder by nickel carbonyl thermal decomposition |
| CN1817527A (en) * | 2006-03-17 | 2006-08-16 | 金川集团有限公司 | Production of spherical nickel powder |
| CN1817526A (en) * | 2006-03-17 | 2006-08-16 | 金川集团有限公司 | Production of dendritic superfine nickle powder |
| CN1817528A (en) * | 2006-03-17 | 2006-08-16 | 金川集团有限公司 | Production of spherical superfine nickel powder |
Non-Patent Citations (1)
| Title |
|---|
| 《中国镍钴合金》 20001031 何焕华，蔡乔方主编 镍的气化冶金 冶金工业出版社 628-629 , 1 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104551013A (en) * | 2014-12-07 | 2015-04-29 | 金川集团股份有限公司 | Method for controlling particle size of carbonyl iron powder during decomposition process |
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Application publication date: 20110413 |