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ferro phosphorus (FeP) is an alloy of iron and phosphorus. It contains a high proportion of iron phosphides, Fe2P and Fe3P.
It is used as a metallurgical raw material to prepare phosphorus-silicon alloys and is also a by-product of the production of white phosphorus in electric submerged arc furnaces. It is a slag-like liquid, with a high specific gravity that collects at the bottom of the furnace.
Phosphorus-silicon alloys
In a molten state, FeP is oxidized by the addition of solid oxidizer to produce a silicon-silicon alloy. The amount of oxidizer required depends on the concentration of phosphorus in the ferrophosphorus and the stoichiometric ratio of the oxidizer to the phosphorus. When the phosphorus is finely divided, it is necessary to add excess oxidizer to achieve desired silicon content.
Briquets
Briquets made from a mixture of finely divided ferrophosphorus and an oxidizing agent are produced by molding the mixture and damping with water. They possess excellent physical strength and exhibit an effective low silicon content when added to molten steel.
Battery grade precursor*
The prepared battery grade precursor FePO4 is an amorphous iron phosphate. It is characterized by high crystallinity, uniform particle dispersion, and good morphology. Its molar ratio of iron to phosphorus is 0.97.
Influence of carbon dosage on mass losses and phosphorus extraction in a gas phase after co-reduction of PR and CS at different temperatures, durations of the melting process and ratios of FP/FS 65 [21]. Conclusion: With an increase in the carbon dosage, mass losses first increased, then decreased, and a maximum amount of Fe-P was obtained at a carbon dosage of 12 wt%.