Description

ferro phosphorus Factory

phosphorus iron

Brand	Chemical Composition (%)
	P	Si	C	S	Mn
	P	≤
FeP24	23.0～25.0	3.0	1.0	0.5	2.0
FeP21	20.0～＜23.0	3.0	1.0	0.5	2.0
FeP18	17.0～＜20.0	3.0	1.0	0.5	2.5
FeP16	15.0～＜17.0	3.0	1.0	0.5	2.5

phosphorus and iron

Ferrophosphorus is a ferroalloy, an alloy of iron and phosphorus. It contains high proportion of iron phosphides, Fe2P and Fe3P. Its CAS number is 8049-19-2. The usual grades contain either 18 or 25% of phosphorus. It is a gray solid material with melting point between 1050-1100 °C. It may liberate phosphine in contact with water. Very fine powder can be combustible.

Ferrophosphorus is used in metallurgy as a source of phosphorus for alloying, for deoxidizing the melt and for removal of unwanted compounds into slag.

Ferrophosphorus is a byproduct of phosphorus production in submerged-arc furnaces from apatites, by their reduction with carbon. It is formed from the iron oxide impurities.

Addition of ferrophosphorus is used to produce powder metallurgy (P/M) steels with favorable magnetic properties, e.g. high saturation induction. Iron phosphide acts here as a solid solution hardener and a sintering aid. Usually about 0.45 w/o of phosphorus is added to iron; higher amount can improve magnetic properties but at above about 0.8 w/o the process parameters have to be too tightly controlled to prevent phosphorus segregation on grain boundaries and resulting excessive brittleness.

FeP21 Granules