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The investigations of concentrating iron, slag and britholite(Ce,La,Pr,Nd) from gaseous reduced Bayan Obo ore were conducted at 1 473 K in a super gravitational field. The results showed that iron grains concentrated at the bottom area along super gravitational direction, whereas the gangue formed the slag in the upper area along the opposite direction, as well as the REEs enriched into britholite-(Ce,La,Pr,Nd) with a typical hexagonal structure and concentrated in the bottom slag. Moreover, the effects of gravity coefficient on both iron-slag separation and the concentration of REEs precipitates were investigated further.

Direct Concentration of Iron, Slag and Britholite-(Ce,La,Pr,Nd) at 1473 K in a Super Gravitational Field