CN102070202A - Method for increasing purity of carbonyl iron powder - Google Patents
Method for increasing purity of carbonyl iron powder Download PDFInfo
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- CN102070202A CN102070202A CN 201010561204 CN201010561204A CN102070202A CN 102070202 A CN102070202 A CN 102070202A CN 201010561204 CN201010561204 CN 201010561204 CN 201010561204 A CN201010561204 A CN 201010561204A CN 102070202 A CN102070202 A CN 102070202A
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- carbonyl iron
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- iron powder
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Abstract
The invention discloses a method for increasing the purity of carbonyl iron powder, and relates to a method for increasing the purity of the carbonyl iron powder by introducing gas into the common carbonyl iron powder for reduction. The method is characterized in that the process is as follows: reduction treatment is carried out on the carbonyl iron powder under the condition of introducing hydrogen, ammonia or mixed gas of hydrogen and water steam, the reduction temperature is 350 DEG C-850 DEG C, the reduction time is 0.5h-5h, and the use amount of gas is 1.0-50Nm<3>/kg (carbonyl iron powder). In the method for increasing the purity of the carbonyl iron powder, the operation is simple and convenient, the reduction treatment is carried out on the carbonyl iron powder by introducing the gas, detection and analysis are carried out on the obtained carbonyl iron powder, the content of iron in a product is greatly increased, the contents of impurities of carbon, oxygen and nitrogen are obviously reduced, and high-purity carbonyl iron powder is produced. For the carbonyl iron powder treated by the method, the purity is greatly increased, and is increased from 96 percent to more than 98.5 percent.
Description
Technical field
A kind of method that improves carbonyl iron dust purity relates to the method that the reduction of a kind of common carbonyl iron dust ventilation body improves carbonyl iron dust purity.
Background technology
Producing of common carbonyl iron dust is the mixed gas powder-product that thermolysis obtains under certain temperature and pressure by iron carbonyl, carbon monoxide and ammonia, because the difficult controls of processing parameter such as splitter temperature field, and ammonia and a spot of decomposition of carbon monoxide, the carbon of the common carbonyl iron dust of producing, oxygen, nitrogen impurity content are than higher, be difficult to satisfy user's requirement in the field of high-precision end, so must reduce processing to common carbonyl iron dust, reduce foreign matter contents such as carbon, oxygen, nitrogen, produce the high purity carbonyl iron dust.
Summary of the invention
The objective of the invention is for provide a kind of can be with the purity of carbonyl iron dust by 96% method of bringing up to the raising carbonyl iron dust purity more than 98.5%.
To achieve these goals, the present invention adopts following method to realize.
A kind of method that improves carbonyl iron dust purity, it is characterized in that its process be with carbonyl iron dust under the condition of logical hydrogen, ammonia or hydrogen and water vapor mixture body, reduce processing.
A kind of method that improves carbonyl iron dust purity of the present invention is characterized in that its reduction temperature is 350-850 ℃, and the recovery time is 0.5-5h, and gas usage is 1.0-50Nm
3/ kg-carbonyl iron dust.
A kind of method that improves carbonyl iron dust purity of the present invention is characterized in that hydrogen purity is 99.9%-99.999%.
A kind of method that improves carbonyl iron dust purity of the present invention is characterized in that ammonia purity is 98.0%-99.999%.
A kind of method that improves carbonyl iron dust purity of the present invention is characterized in that water vapor purity is 99.9%-99.999%.
A kind of method that improves carbonyl iron dust purity of the present invention is characterized in that in hydrogen and the water vapor mixture body that it is 5%-30% that water vapor accounts for percent by volume.
A kind of method that improves carbonyl iron dust purity of the present invention is characterized in that carbonyl iron dust is that mean particle size is 1.0-10.0 μ m, and loose density is 2.0-5.0g/cm
3Common carbonyl iron dust.
A kind of method that improves carbonyl iron dust purity of the present invention, easy and simple to handle, carbonyl iron dust is through ventilation body reduction processing, the carbonyl iron dust that obtains is carried out check and analysis, iron level significantly improves in the product, and carbon, oxygen, nitrogen impurity content significantly reduce, and have produced the high purity carbonyl iron dust.The carbonyl iron dust that uses present method to handle, purity significantly improves, and purity is brought up to more than 98.5% by 96%.
Embodiment
A kind of method that improves carbonyl iron dust purity is 1.0-10.0 μ m with mean particle size, and loose density is 2.0-5.0g/cm
3Common carbonyl iron dust is tiled in the reduction furnace, and powder thickness is 1-15cm, reduces the method for processing through logical hydrogen or ammonia or hydrogen and water vapor mixture body (it is 5-30% that water vapor accounts for percent by volume).The reduction furnace temperature is set at 350-850 ℃, and the recovery time is 0.5-5h, and gas usage is 1.0-50Nm
3/ kg, hydrogen purity is 99.9-99.999%, and ammonia purity is 98.0-99.999%, and water vapor purity is 99.9-99.999%.
Embodiment 1
With mean particle size is 2.3 μ m, and loose density is 2.4g/cm
3, purity is that 97.0% common carbonyl iron dust is tiled in the reduction furnace, and powder thickness is 2.5-3.0cm, reduces processing through logical hydrogen, and the reduction furnace temperature is set at 650-660 ℃, and the recovery time is 3.5h, gas usage is 28Nm
3/ kg, hydrogen purity is 99.99%, the carbonyl iron dust that uses present method to handle, purity significantly improves, and purity brings up to 99.6% by 97.0%.
Embodiment 2
With mean particle size is 5.0 μ m, and loose density is 3.4g/cm
3, purity is that 98.0% common carbonyl iron dust is tiled in the reduction furnace, and powder thickness is 1.0-1.5cm, reduces processing through logical hydrogen, and the reduction furnace temperature is set at 450-460 ℃, and the recovery time is 3.5h, gas usage is 35Nm
3/ kg, hydrogen purity is 99.99%, the carbonyl iron dust that uses present method to handle, purity significantly improves, and purity brings up to 99.7% by 98.0%.
Embodiment 3
With mean particle size is 3.0 μ m, and loose density is 2.8g/cm
3Purity is that 96.7% common carbonyl iron dust is tiled in the reduction furnace, powder thickness is 7.0-7.5cm, reduce processing through logical hydrogen and water vapor mixture body (it is 20% that water vapor accounts for percent by volume), the reduction furnace temperature is set at 700-710 ℃, recovery time is 2.5h, and gas usage is 38Nm
3/ kg, hydrogen purity is 99.99%, water vapor purity is 99.9%, the carbonyl iron dust that uses present method to handle, purity significantly improves, and purity brings up to 98.6% by 96.7%.
Embodiment 4
With mean particle size is 5.2 μ m, and loose density is 3.0g/cm
3, purity is that 98.2% common carbonyl iron dust is tiled in the reduction furnace, and powder thickness is 2.5-3.0cm, reduces processing through logical ammonia, and the reduction furnace temperature is set at 650-660 ℃, and the recovery time is 3.5h, gas usage is 35Nm
3/ kg, ammonia purity is 99.9%, the carbonyl iron dust that uses present method to handle, purity significantly improves, and purity brings up to 99.8% by 98.2%.
Claims (7)
1. method that improves carbonyl iron dust purity, it is characterized in that its process be with carbonyl iron dust under the condition of logical hydrogen, ammonia or hydrogen and water vapor mixture body, reduce processing.
2. a kind of method that improves carbonyl iron dust purity according to claim 1 is characterized in that its reduction temperature is 350-850 ℃, and the recovery time is 0.5-5h, and gas usage is 1.0-50Nm
3/ kg-carbonyl iron dust.
3. a kind of method that improves carbonyl iron dust purity according to claim 1 is characterized in that hydrogen purity is 99.9%-99.999%.
4. a kind of method that improves carbonyl iron dust purity according to claim 1 is characterized in that ammonia purity is 98.0%-99.999%.
5. a kind of method that improves carbonyl iron dust purity according to claim 1 is characterized in that water vapor purity is 99.9%-99.999%.
6. a kind of method that improves carbonyl iron dust purity according to claim 1 is characterized in that in hydrogen and the water vapor mixture body that it is 5%-30% that water vapor accounts for percent by volume.
7. a kind of method that improves carbonyl iron dust purity according to claim 1 is characterized in that carbonyl iron dust is that mean particle size is 1.0-10.0 μ m, and loose density is 2.0-5.0g/cm
3Common carbonyl iron dust.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010561204 CN102070202A (en) | 2010-11-23 | 2010-11-23 | Method for increasing purity of carbonyl iron powder |
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| CN 201010561204 CN102070202A (en) | 2010-11-23 | 2010-11-23 | Method for increasing purity of carbonyl iron powder |
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| CN102070202A true CN102070202A (en) | 2011-05-25 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102718269A (en) * | 2012-06-05 | 2012-10-10 | 金川集团股份有限公司 | Preparation method of carbonyl iron |
| CN104475760A (en) * | 2014-12-07 | 2015-04-01 | 金川集团股份有限公司 | Production method of carbonyl iron powder |
| CN104495955A (en) * | 2014-12-07 | 2015-04-08 | 金川集团股份有限公司 | Preparation method of carbonyl iron powder |
| CN105458279A (en) * | 2015-11-30 | 2016-04-06 | 金川集团股份有限公司 | Method for lowering carbon content of carbonyl iron powder |
| CN113059182A (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 magnetic grinding fluid |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101856725A (en) * | 2010-06-22 | 2010-10-13 | 荆门市格林美新材料有限公司 | Method for preparing superfine nickel powder by direct reduction |
-
2010
- 2010-11-23 CN CN 201010561204 patent/CN102070202A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101856725A (en) * | 2010-06-22 | 2010-10-13 | 荆门市格林美新材料有限公司 | Method for preparing superfine nickel powder by direct reduction |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102718269A (en) * | 2012-06-05 | 2012-10-10 | 金川集团股份有限公司 | Preparation method of carbonyl iron |
| CN104475760A (en) * | 2014-12-07 | 2015-04-01 | 金川集团股份有限公司 | Production method of carbonyl iron powder |
| CN104495955A (en) * | 2014-12-07 | 2015-04-08 | 金川集团股份有限公司 | Preparation method of carbonyl iron powder |
| CN105458279A (en) * | 2015-11-30 | 2016-04-06 | 金川集团股份有限公司 | Method for lowering carbon content of carbonyl iron powder |
| CN113059182A (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 magnetic grinding fluid |
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Application publication date: 20110525 |