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Reduced iron powder has high activity

The high activity of reduced iron powder is determined by pulverizing technology and powder particle state

1, the effect of pulverizing process on the activity of pulverizing process on the crystallization structure of powder particles plays a major role in general, powder particles have a polycrystalline structure, and the size of the grain depends on the process characteristics and conditions, for very fine powder may appear single crystal particles The complexity of the actual structure of powder particles also shows that the crystal is seriously incomplete, that is, there are many crystallization defects, such as void distortion inclusion, so the powder is always stored with high lattice distortion energy, with high activity.

2, the influence of the surface state of powder particles on the activity
The surface state of reduced iron powder particles is very complicated. Generally, the finer the powder particles, the more developed the outer surface; At the same time, the defects of powder particles are many, and the inner surface is quite large. The developed powder surface stores high surface energy, so the ultrafine powder is easy to spontaneously aggregate into secondary particles, and easy to oxidize and spontaneously combinate in air.