850
T. Yue et al.
Fig. 1 Schematic illustration of magnetic separation and production of desired goethite and gypsum
product
Fig. 2 Recovery of Fe and Ca (a) in the concentrate and tailing after magnetic separation,
respectively; SEM images (b–e) of the concentrate and tailing with 7 g/L MNPs
precipitates formed on the surface of γ-Fe 2 O 3 was much larger than that on α-Fe 3 O 4
surface. It can be also observed that the losses of Ca in the concentrates were almost
the same with different MNPs addition and increased slightly with increase in the
dosage of the MNPs, suggesting that gypsum precipitates lost in the concentrates
were not affected by the MNPs. The slight increase in the loss of Ca in the concentrates would be attributed to the entrainment of gypsum by the magnetic particles in
the magnetic separation.
T. Yue et al.
Fig. 1 Schematic illustration of magnetic separation and production of desired goethite and gypsum
product
Fig. 2 Recovery of Fe and Ca (a) in the concentrate and tailing after magnetic separation,
respectively; SEM images (b–e) of the concentrate and tailing with 7 g/L MNPs
precipitates formed on the surface of γ-Fe 2 O 3 was much larger than that on α-Fe 3 O 4
surface. It can be also observed that the losses of Ca in the concentrates were almost
the same with different MNPs addition and increased slightly with increase in the
dosage of the MNPs, suggesting that gypsum precipitates lost in the concentrates
were not affected by the MNPs. The slight increase in the loss of Ca in the concentrates would be attributed to the entrainment of gypsum by the magnetic particles in
the magnetic separation.