CN101209863A - Passivation method of carbonyl iron powder - Google Patents
Passivation method of carbonyl iron powder Download PDFInfo
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- CN101209863A CN101209863A CNA2007103041963A CN200710304196A CN101209863A CN 101209863 A CN101209863 A CN 101209863A CN A2007103041963 A CNA2007103041963 A CN A2007103041963A CN 200710304196 A CN200710304196 A CN 200710304196A CN 101209863 A CN101209863 A CN 101209863A
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- carbonyl iron
- iron dust
- iron powder
- oxygen
- passivation treatment
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Abstract
The invention discloses a method for passivating carbonyl iron powder. The invention is characterized by passivation course that: trace amount of oxygen is infused into the carbonyl iron powder under the protection of nitrogen, which ensures that passivation takes place at the surface of the carbonyl iron powder with the highest activity so as to reduce the overall activity of the carbonyl iron powder. The method of the invention infuses trace amount of oxygen into the carbonyl iron powder under the protection of nitrogen to ensure that surface oxidation treatment takes place at part of the carbonyl iron powder with the highest activity so as to reduce overall surface activity of the carbonyl iron powder and be convenient to store and transport.
Description
Technical field
The invention discloses a kind of method of carbonyl iron dust Passivation Treatment.
Background technology
At present in the production of carbonyl iron dust, product has just carried out nitrogen and has disinfected before packing, in final packaging and transportation, because the carbonyl iron dust activity is too strong, the easy grade deep oxidation phenomenon of catching fire, cause the constant product quality of carbonyl iron dust relatively poor, limited the Application Areas scope of product.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists at above-mentioned prior art, a kind of overall activity that can effectively reduce carbonyl iron dust is provided, eliminate its deep oxidation imagination in packing and transportation, finally keep the method for constant product quality in the carbonyl iron dust Passivation Treatment of higher range.
The objective of the invention is to be achieved through the following technical solutions.
A kind of method of carbonyl iron dust Passivation Treatment is characterized in that the Passivation Treatment process is to inject trace oxygen in the carbonyl iron dust of nitrogen atmosphere protection, makes active the strongest carbonyl iron dust generation surface passivation reaction, has reduced the overall activity of carbonyl iron dust.
The method of a kind of carbonyl iron dust Passivation Treatment of the present invention, the pressure that it is characterized in that described nitrogen protection atmosphere is 10-30kPa.
The method of a kind of carbonyl iron dust Passivation Treatment of the present invention is characterized in that describedly when injecting trace oxygen in the carbonyl iron dust of nitrogen atmosphere protection, and the volume that injects oxygen is the 0.05%-0.08% of gas gross.
The method of a kind of carbonyl iron dust Passivation Treatment of the present invention is characterized in that describedly injecting micro amount of oxygen in the atmosphere of nitrogen protection, makes the strongest carbonyl iron dust generation surface oxidation reaction of activity that accounts for carbonyl iron dust gross weight 0.1%-0.5%.
The method of a kind of carbonyl iron dust Passivation Treatment of the present invention; utilization is injected the method for micro amount of oxygen part the strongest active carbonyl iron dust is carried out surface oxidation treatment in the carbonyl iron dust of nitrogen protection atmosphere; make whole reduction of surfactivity of carbonyl iron dust; relatively store and transportation, and do not influence the overall performance of iron powder.
Embodiment
A kind of method of carbonyl iron dust Passivation Treatment, its Passivation Treatment process are to inject trace oxygen in the carbonyl iron dust of nitrogen atmosphere protection, make active the strongest carbonyl iron dust generation surface passivation reaction, have reduced the overall activity of carbonyl iron dust; The pressure of its nitrogen protection atmosphere is 10-30kPa, and the volume that injects oxygen is the 0.05%-0.08% of gas gross, makes the strongest carbonyl iron dust generation surface oxidation reaction of activity that accounts for carbonyl iron dust gross weight 0.1%-0.5%.
Embodiment 1
In the carbonyl iron dust of 20.000kpa nitrogen atmosphere, feeding purity is 99.96% oxygen, and injecting volume is 0.07% of carbonyl iron dust nitrogen volume, product can normally be packed, oxygen level is to analyze once more after 0.0014%, one month in the analysis carbonyl iron dust, and oxygen level is 0.0014%.
Embodiment 2
In the carbonyl iron dust of 18.000kpa nitrogen atmosphere, feeding purity is 99.98% oxygen, and injecting volume is 0.08% of carbonyl iron dust nitrogen volume, product can normally be packed, oxygen level is to analyze once more after 0.0012%, one month in the analysis carbonyl iron dust, and oxygen level is 0.0013%.
Embodiment 3
In the carbonyl iron dust of 28.000kpa nitrogen atmosphere, feeding purity is 99.96% oxygen, and injecting volume is 0.08% of carbonyl iron dust nitrogen volume, product can normally be packed, oxygen level is to analyze once more after 0.001%, one month in the analysis carbonyl iron dust, and oxygen level is 0.0013%.
Embodiment 4
In the carbonyl iron dust of 30.000kpa nitrogen atmosphere, feeding purity is 99.98% oxygen, and injecting volume is 0.06% of carbonyl iron dust nitrogen volume, product can normally be packed, oxygen level is to analyze once more after 0.0010%, one month in the analysis carbonyl iron dust, and oxygen level is 0.0011%.
Claims (4)
1. the method for carbonyl iron dust Passivation Treatment is characterized in that the Passivation Treatment process is to inject trace oxygen in the carbonyl iron dust of nitrogen atmosphere protection, makes active the strongest carbonyl iron dust generation surface passivation reaction, has reduced the overall activity of carbonyl iron dust.
2. the method for a kind of carbonyl iron dust Passivation Treatment according to claim 1, the pressure that it is characterized in that described nitrogen protection atmosphere is 10-30kPa.
3. the method for a kind of carbonyl iron dust Passivation Treatment according to claim 1 is characterized in that describedly when injecting trace oxygen in the carbonyl iron dust of nitrogen atmosphere protection, and the volume that injects oxygen is the 0.05%-0.08% of gas gross.
4. the method for a kind of carbonyl iron dust Passivation Treatment according to claim 1; it is characterized in that describedly in the atmosphere of nitrogen protection, injecting micro amount of oxygen, make the strongest carbonyl iron dust generation surface oxidation reaction of activity that accounts for carbonyl iron dust gross weight 0.1%-0.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103041963A CN101209863A (en) | 2007-12-25 | 2007-12-25 | Passivation method of carbonyl iron powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103041963A CN101209863A (en) | 2007-12-25 | 2007-12-25 | Passivation method of carbonyl iron powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101209863A true CN101209863A (en) | 2008-07-02 |
Family
ID=39610142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007103041963A Pending CN101209863A (en) | 2007-12-25 | 2007-12-25 | Passivation method of carbonyl iron powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101209863A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107225233A (en) * | 2017-07-17 | 2017-10-03 | 金川集团股份有限公司 | It is a kind of that the device and method that powder is passivated is produced to carbonyl process |
| CN108408790A (en) * | 2017-12-15 | 2018-08-17 | 金川集团股份有限公司 | A kind of processing unit and processing method of carbonyl iron dust adsorbed gas |
| CN113059183A (en) * | 2020-01-02 | 2021-07-02 | 吉林卓创新材料有限公司 | Preparation method of carbonyl iron powder special for iron powder core |
-
2007
- 2007-12-25 CN CNA2007103041963A patent/CN101209863A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107225233A (en) * | 2017-07-17 | 2017-10-03 | 金川集团股份有限公司 | It is a kind of that the device and method that powder is passivated is produced to carbonyl process |
| CN107225233B (en) * | 2017-07-17 | 2019-09-13 | 金川集团股份有限公司 | The device and method that a kind of pair of carbonyl process production powder is passivated |
| CN108408790A (en) * | 2017-12-15 | 2018-08-17 | 金川集团股份有限公司 | A kind of processing unit and processing method of carbonyl iron dust adsorbed gas |
| CN113059183A (en) * | 2020-01-02 | 2021-07-02 | 吉林卓创新材料有限公司 | Preparation method of carbonyl iron powder special for iron powder core |
| CN113059183B (en) * | 2020-01-02 | 2023-05-19 | 吉林卓创新材料有限公司 | Preparation method of carbonyl iron powder special for iron powder core |
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Open date: 20080702 |