Method for producing nano-iron powder

A production method and nano-iron powder technology are applied in the field of carbonyl iron production of nano-iron powder, which can solve the problems of insufficient particle size of iron powder, easy oxidation of powder, poor activity, etc., and achieve stable physical and chemical properties, easy control, and avoidance of two problems. The effect of secondary pollution
CN1947901AInactive Publication Date: 2007-04-18JINCHUAN GROUP LIMITED
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JINCHUAN GROUP LIMITED
Publication Date
2007-04-18
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

A process for preparing Fe nanoparticles from carbonyl iron includes such steps as heating the carbonyl iron to become vapor, mixing it with CO gas, feeding the mixture into a decomposing apparatus, and hot decomposing while controlling the internal temp and pressure to be 150-400 deg.C and 1-10 KPa.
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Description

technical field

[0001] A method for producing nano iron powder relates to a method for producing nano iron powder with carbonyl iron by adopting a carbonyl method. Background technique

[0002] Iron powder is widely used in powder metallurgy, magnetic materials, military industry, steel, food and other fields. At present, the methods of producing iron powder include electrolysis, chemical reduction and atomization. In foreign countries, BASF companies have used the carbonyl method to produce iron powder in large quantities. The products are characterized by good activity, fine particle size, large specific surface area and good magnetic properties. The use of carbonyl method to produce nano-iron powder has not been reported. At present, when using the existing technology to prepare ultra-fine iron powder, the produced iron powder has insufficient particle size, poor activity, poor magnetic properties, and the powder is easily oxidized. SUMMARY OF THE INVENTION

[0003] ...

Claims

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