Classification of iron powder

1. Pig iron powder: 

It is made of cast iron or the leftover material of metal processing industry, and its carbon content is about 2-4%. It is a kind of alloy powder of iron, which is usually used in sewage treatment industry.Using galvanic cell reaction, the wastewater is decolorized.

2. Reduced iron powder: 

Reduced iron powder production method is by chemical reduction method, which USES carbon monoxide produced by the reduction of steel rolling iron phosphorus of elemental iron powder produced by this method is called reduced iron powder, with a good degree of clearance and spongy microstructure, so also known as sponge iron iron powder and iron content is generally more than 96.0% can be applied to chemical reduction, powder metallurgy and other industries, but because of the high concentration of iron oxide, products of usually only 5.8 g/cm3 density, hardness is large, secondary processing.

3.Electrolytic iron powder : 

Will scrap steel in the aqueous solution of ferric sulfate produced by electrolysis of high purity iron called electrolytic iron powder, the purity of elemental iron powder is very high, its particles are very small, irregular shape, large surface area studies have shown that the chemical activity of elemental iron powder body absorption rate in different kinds of iron powder is one of the biggest, but due to the production cost is expensive, the elemental iron powder is difficult to popularize.

4.Hydroxyl iron powder : 

Hydroxyl iron powder is the main component is iron, and formed a kind of compound Fe - OH, physical properties of circular particle, in all kinds of elemental iron powder is the most tiny, but the gap is very low in the industry can be used for desulfurization process, the removal effect is good, can replace ZnO in certain situation, its cost is more cheaper than ZnO, and desulfurization effect better but due to the production cost is expensive, the elemental iron powder has not been widespread use.

5.Atomized iron powder 

(1) water atomized iron powder, divided into low carbon steel liquid water atomization method, method of QMP two.

(2) production technology with high pressure gas liquid iron water impact, it further oxidized iron powder aerosol are through again after atomization cooling iron powder reduction, can deoxidization, finished product relative to the aerosol change much iron powder reduction process, now most of water atomized iron powder.