Magnetite powder is obtained by hydrogen reduction of ferric oxide. High temperature reduction is very strong, very lively nature. It is often said that the "flint". The common iron is iron powder.
Reduction of iron powder is commonly used to say that the reduction method of iron powder, also known as reduction iron powder
A highly reactive iron powder, because of strong reduction, it is prone to oxidation, even in the air heating will burn slightly, because of its characteristic, often used for welding of rails, chemical reduction, prevent oxidative deterioration.