1690 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
55% indicating a high selectivity of Urea to Co over Sm.
Also, the conversion for both Sm and Co increases with
increasing time. Rare earth metals react, but slowly, with
strong bases [15], and since Reline is a strong alkaline [28]
the low conversion of Sm in Urea can be attributed to it.
Samarium (Sm) and Cobalt (Co) Conversion (%)from
SmCo Magnet Leaching in Reline Without RAM (WR)
and After RAM (AR) Intensification
From Figure 4 both Sm and Co conversions increased after
RAM intensification. The rate of dissolution of both Sm
and Co did not decrease after 30 minutes indicating that
the intensification time can be increased further to achieve
higher conversions. The increase in conversion after the
intensification can be attributed to the change in the inter-
facial hydrodynamic layer caused by the resonant vibration
of the RAM [35] thereby accelerating the mass transfer pro-
cess [35].
Samarium (Sm) and Cobalt (Co) Conversion (%)from
SmCo Magnet Leaching in Ethaline
Figure 5 shows the conversion of Samarium and Cobalt in
Ethaline. The Sm dissolution is relatively low with about
14% conversion as compared to the Co conversion of
about 24% after 2hrs.
Figure 2. Samarium (Sm) and Cobalt (Co) dissolution from
SmCo magnet leaching in Oxaline Without RAM (WR) and
After RAM (AR) Intensification
Figure 4. Samarium (Sm) and Cobalt (Co) dissolution from
SmCo magnet leaching in Reline Without RAM (WR) and
After RAM (AR) Intensification
Figure 3. Samarium (Sm) and Cobalt (Co) dissolution from
SmCo magnet leaching in Reline
Figure 5. Samarium (Sm) and Cobalt (Co) dissolution from
SmCo magnet leaching in Ethaline
55% indicating a high selectivity of Urea to Co over Sm.
Also, the conversion for both Sm and Co increases with
increasing time. Rare earth metals react, but slowly, with
strong bases [15], and since Reline is a strong alkaline [28]
the low conversion of Sm in Urea can be attributed to it.
Samarium (Sm) and Cobalt (Co) Conversion (%)from
SmCo Magnet Leaching in Reline Without RAM (WR)
and After RAM (AR) Intensification
From Figure 4 both Sm and Co conversions increased after
RAM intensification. The rate of dissolution of both Sm
and Co did not decrease after 30 minutes indicating that
the intensification time can be increased further to achieve
higher conversions. The increase in conversion after the
intensification can be attributed to the change in the inter-
facial hydrodynamic layer caused by the resonant vibration
of the RAM [35] thereby accelerating the mass transfer pro-
cess [35].
Samarium (Sm) and Cobalt (Co) Conversion (%)from
SmCo Magnet Leaching in Ethaline
Figure 5 shows the conversion of Samarium and Cobalt in
Ethaline. The Sm dissolution is relatively low with about
14% conversion as compared to the Co conversion of
about 24% after 2hrs.
Figure 2. Samarium (Sm) and Cobalt (Co) dissolution from
SmCo magnet leaching in Oxaline Without RAM (WR) and
After RAM (AR) Intensification
Figure 4. Samarium (Sm) and Cobalt (Co) dissolution from
SmCo magnet leaching in Reline Without RAM (WR) and
After RAM (AR) Intensification
Figure 3. Samarium (Sm) and Cobalt (Co) dissolution from
SmCo magnet leaching in Reline
Figure 5. Samarium (Sm) and Cobalt (Co) dissolution from
SmCo magnet leaching in Ethaline