FIELD: metallurgy industry.
SUBSTANCE: invention refers to powder metallurgy, and namely to method of obtaining sponge iron used for fine metal powder manufacture. Iron oxide is mixed with iron powder and carbon-bearing matter. Obtained mixture is briquetted and reduced by means of being heated. At that, phenol-formaldehyde resin is used as carbon-bearing matter; iron oxide particle size is less than 1 micron, and heating of briquettes is two-staged. At the first stage they are heated with no air access at t=750-800°C, and at the second stage - in vacuum at t=800-850°C.
EFFECT: improving degree of dispersion of sponge iron structure, which allows obtaining fine powder therefrom, as well as reducing energy consumption.
2 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
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| EXTRUSION-TYPE SLURRY BRIQUETTE (BREKS) | 2012 |
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| METHOD OF PRODUCTION OF BRIQUETTES FROM IRON-CONTAINING WASTES | 2003 |
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| METHOD AND DEVICE FOR INTRODUCING A FINE-DISPERSED MATERIAL IN A FLUIDIZED LAYER OF A RESTORABLE UNIT WITH A FLUIDIZED LAYER | 2013 |
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