What is the difference between iron powder and reduced iron powder

Reductive iron powder is obtained by reducing iron trioxide at high temperature with hydrogen.It is particularly reductive and lively in nature.It is commonly referred to as flint. Ordinary iron powder is powder of elemental iron. Reductive iron powder is commonly referred to as iron powder produced by reduction method, or reduced iron powder (pure iron).

A very active iron powder, because of its strong reducibility, is easy to have oxidation reaction, even in the air a little heating will burn, because of its this characteristic, often used for welding rail chemical reduction to prevent oxidation deterioration.

Pig iron powder refers to pig iron ground into powder, and pig iron is an iron alloy with carbon content of more than 2%.