568 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
of minus and plus 40 mm in size (Table 5). Table 6 shows
the results of the dry magnetic separation performed on the
fraction smaller than 40 mm and also the fraction coarser
than 40 mm. As it can be seen, by one stage of dry MIMS
magnetic separation on minus 40 mm grain size and linear
speed of 2.5 m/s, the iron grade of the feed increased from
12.02% to 37.63T at a weigh recovery of 15.46%. For the
fraction coarser than 40 mm in size, a pre-concentrate with
an iron grade of 34.41% and a weight recovery of 35 %
could be produced through dry belt drum MIMS magnetic
separation with a linear speed of 1.5 m/s. Under these con-
ditions, weight recovery of final pre concentrate, iron grade,
and total iron recovery were 27.4%, 35.08%, and 60.35%,
respectively. The chemical composition of the products is
given in Table 7.
Final Concentrate Test Works
Wet Medium Intensity Magnetic Separation (Wet
MIMS)
The magnetic separation tests were done on the mixed pre-
concentrate sample with a particle size of k80= 100 micron
using a pilot scale wet medium-intensity drum magnetic
separator with a diameter and length of 750 mm and
300 mm, respectively. The intensity of the magnetic sepa-
rator was determined to be 3800 gauss and the tank type
was dense media. The optimized conditions for medium
Figure 3. Industrial belt drum separator
Table 5. Chemical-screening of original feed
Item Yield, %Fe, %FeO, %
Original Feed 100.00 15.46 4.74
Coarser than 40 mm 62.00 17.57 5.25
Less than 40 mm 38.00 12.02 3.91
Table 6. Dry magnetic separation by belt drum MIMS separator, coarser than 40 mm
Item Yield, %Fe, %FeO, %Fe-rec., %
Feed 100 17.57 5.25 100.00
Portion, 40 mm Magnetic product 35 34.41 11.47 68.55
Non-magnetic 65 8.5 1.90 31.45
Feed 100 12.02 3.91 100.00
Portion, 40 mm Magnetic product 15 37.63 12.5 46.96
Non-magnetic 85 7.5 2.39 53.04
Composite magnetic product 27.40 35.08 9.13 60.35
of minus and plus 40 mm in size (Table 5). Table 6 shows
the results of the dry magnetic separation performed on the
fraction smaller than 40 mm and also the fraction coarser
than 40 mm. As it can be seen, by one stage of dry MIMS
magnetic separation on minus 40 mm grain size and linear
speed of 2.5 m/s, the iron grade of the feed increased from
12.02% to 37.63T at a weigh recovery of 15.46%. For the
fraction coarser than 40 mm in size, a pre-concentrate with
an iron grade of 34.41% and a weight recovery of 35 %
could be produced through dry belt drum MIMS magnetic
separation with a linear speed of 1.5 m/s. Under these con-
ditions, weight recovery of final pre concentrate, iron grade,
and total iron recovery were 27.4%, 35.08%, and 60.35%,
respectively. The chemical composition of the products is
given in Table 7.
Final Concentrate Test Works
Wet Medium Intensity Magnetic Separation (Wet
MIMS)
The magnetic separation tests were done on the mixed pre-
concentrate sample with a particle size of k80= 100 micron
using a pilot scale wet medium-intensity drum magnetic
separator with a diameter and length of 750 mm and
300 mm, respectively. The intensity of the magnetic sepa-
rator was determined to be 3800 gauss and the tank type
was dense media. The optimized conditions for medium
Figure 3. Industrial belt drum separator
Table 5. Chemical-screening of original feed
Item Yield, %Fe, %FeO, %
Original Feed 100.00 15.46 4.74
Coarser than 40 mm 62.00 17.57 5.25
Less than 40 mm 38.00 12.02 3.91
Table 6. Dry magnetic separation by belt drum MIMS separator, coarser than 40 mm
Item Yield, %Fe, %FeO, %Fe-rec., %
Feed 100 17.57 5.25 100.00
Portion, 40 mm Magnetic product 35 34.41 11.47 68.55
Non-magnetic 65 8.5 1.90 31.45
Feed 100 12.02 3.91 100.00
Portion, 40 mm Magnetic product 15 37.63 12.5 46.96
Non-magnetic 85 7.5 2.39 53.04
Composite magnetic product 27.40 35.08 9.13 60.35