Development and preparation of ultrafine iron powder
The technology of producing ultra-fine iron powder by hydrogen reduction is studied,using iron oxide red of pickling waste in steel works as raw material,the cost is less than one third of the cost of producing ultrafine iron powder by carbonyl method.The properties of the products are TFe≥98.5％,loose density is 0.80～1.20 g/cm3,free grain size D50≤16.5 μm,specific surface area is more than 2.10 m2/g.It is widely used in ultra-hard diamond tools,powder metallurgy injection molding materials,high-specification soft magnetic materials,adsorption materi-als,aerospace materials,food and other fields.
ultrafine iron powderhydrogen reductionroasting reductioncarbonyl groupbulk densityparticle size
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