Ferrophosphorus recovery from slag - by quenching silicate phase in water and grading to separate ferrophosphorus

摘要

The slag is formed during the thermal prodn of P from crude phosphate. The ferrophosphorus is sepd. by grading, e.g. in aq. medium, by gravity e.g. using tetrabromoethane decantation, screening and/or electrostatic sepn, and/or other known methods. The product may contain e.g. 99.52 wt % ferrophosphorus and 0.48% Casilicate.