| 摘要 |
PURPOSE:To produce burnt agglomerated ore for iron ore under excellent product yield and productivity by coating and burning the coke powder having the specific grain size on the surface of green pellet, after pelletizing into the green pellet by adding flux to the powdery iron ore. CONSTITUTION:At the time of producing the burnt ore for blast furnace or the raw material for directly reducing iron-making from the powdery iron ore, at least one kind of material or more among lime, slaked lime, limestone, bentonite, dolomite, water granulated blast furnace slag, etc., are added as the flux to the granular iron ore having <8mm grain size, so that CaO/SiO2 as the basicity of finishing burnt agglomerated ore becomes 1.0-2.5, and it is pelletized into the green pellet by kneading with water. On the surface of this green pellet, the powdery coke having 80-100wt% of <1mm grain size and the remaining parts of 1-5mm grain size is coated at 2.5-4.0wt% ratio to the green pellet, to form green pellets having 3-13mm grain size. This is burnt in the endlessly moving grate type burning furnace and the burnt agglomerated ore is produced with the powdery iron ore under excellent product yield and productivity.
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