XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 513
Dry Screening of Iron Ore
Iron ore is one of the most mined commodities worldwide
in terms of volume. Many iron ore producers are explor-
ing different technology and flowsheet to lower their energy
consumptions and operational cost. A large global iron ore
producer is testing a new flowsheet, where is required to
screen out the plus 2 mm of the material with dry screening
(classification) to lower the operating cost on the following
sizing, beneficiation, and dewatering. However, the high
screening efficiency was also required to obtain the clean
undersize with less than 10% of +2 mm material and also
getting satisfactory undersize weight recovery. In addition
to the above requirements, moisture in the hematinic ore
is a big challenge. The speculated range of feed moisture
Table 1. Industrial scale testing data for an american silica producer
Test ID 1 2
Ore Silica ore Silica ore
Machine SG48-120D-3DL SG48-120D-3DL
Panel SBW48-42DF280 SBW48-42DF230
Opening mm 0.05 0.063
Motor RPM 3600 3600
Feed Oversize Undersize Feed Oversize Undersize
Capacity T/H) 0.26 0.14 0.12 0.20 0.10 0.10
Content -230 mesh 42.33 10.76 96.84 42.33 1.99 84.10
Feed Oversize Undersize Feed Oversize Undersize
cum.ret% cum.ret% cum.ret% cum.ret% cum.ret% cum.ret%
60 0.15
70
80
100 0.15
120 0.18 0.61 0.18 0.25
140 0.55 1.67 0.55 1.49
170 6.10 17.42 0.90 6.10 19.60
200 37.34 63.18 2.26 37.34 74.19 1.08
230 57.67 89.24 3.16 57.67 98.01 15.90
270 76.89 99.85 34.44 76.89 99.75 53.55
325 85.21 55.34 85.21 100.00 69.44
400 92.42 76.39 92.42 84.26
500 98.34 93.08 98.34 95.83
-500 100.00 100.00 100.00 100.00 100.00 100.00