Low-Silica Binders for Iron Ore Pelletization
(Room 208B)
09 May 17
11:00 AM
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11:30 AM
Tracks:
DRI Raw Materials
Iron ore pellets are the primary feed in many ironmaking operations. Pellets are made from fine iron oxides and binders. We will show three methods for controlling pellet quality using modified starch, which has historically led to weak, dusty pellets. The three approaches are to (1) mix clay and clay substitutes with starch; (2) add a clay-rich layer onto the outside of starch-bonded pellets; and (3) mix iron oxide dispersants with starch to better disperse fines and densify the pellets. A laboratory investigation showed that with a very fine, fluxed hematite, approach #3 leads to unusually smooth, strong pellets with low levels of dust.