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Passivation method of carbonyl iron powder

A carbonyl iron powder and passivation treatment technology, applied in the direction of carbonyl iron, etc., can solve the problems of deep oxidation at the ignition stage, limited product application field, poor quality stability of carbonyl iron powder products, etc.

Inactive Publication Date: 2008-07-02
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the production of carbonyl iron powder, the product is only sterilized with nitrogen gas before packaging. In the final packaging and transportation process, due to the strong activity of carbonyl iron powder, it is prone to ignition-level deep oxidation, resulting in carbonyl iron powder. The quality stability is poor, which limits the scope of application of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] In the carbonyl iron powder in a nitrogen atmosphere of 20.000kpa, oxygen with a purity of 99.96% is introduced, and the injection volume is 0.07% of the nitrogen volume in the carbonyl iron powder. The product can be packaged normally, and the oxygen content in the carbonyl iron powder is analyzed to be 0.0014%. Analyzed again a month later, the oxygen content was 0.0014%.

Embodiment 2

[0014] In the carbonyl iron powder in a nitrogen atmosphere of 18.000kpa, oxygen with a purity of 99.98% is introduced, and the injection volume is 0.08% of the nitrogen volume in the carbonyl iron powder. The product can be packaged normally, and the oxygen content in the carbonyl iron powder is analyzed to be 0.0012%. Analyzed again a month later, the oxygen content was 0.0013%.

Embodiment 3

[0016] In the carbonyl iron powder in a nitrogen atmosphere of 28.000kpa, oxygen with a purity of 99.96% is introduced, and the injection volume is 0.08% of the nitrogen volume in the carbonyl iron powder. The product can be packaged normally, and the oxygen content in the carbonyl iron powder is analyzed to be 0.001%. Analyzed again a month later, the oxygen content was 0.0013%.

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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 [0001] The invention discloses a passivation treatment method for carbonyl iron powder. Background technique [0002] At present, in the production of carbonyl iron powder, the product is only sterilized with nitrogen gas before packaging. In the final packaging and transportation process, due to the strong activity of carbonyl iron powder, it is prone to ignition-level deep oxidation, resulting in carbonyl iron powder. The quality stability is poor, which limits the range of application fields of the product. Contents of the invention [0003] The purpose of the present invention is to address the shortcomings of the above-mentioned prior art, to provide a method that can effectively reduce the overall activity of carbonyl iron powder, eliminate the imagination of deep oxidation in the process of packaging and transportation, and finally maintain the stability of product quality in a relatively high range. A method for passivation treatment of carbonyl ir...

Claims

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Application Information

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IPC IPC(8): C01G49/16
Inventor 张强林肖冬明刘军位刘俊徐向荣甘振君黄兰贾晓东
Owner JINCHUAN GROUP LIMITED
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