Abstract
Different types of slag during steelmaking could be produced by different iron ore or with different process. The vanadium-titanium magnetite (VTM) is a special kind of iron ore. The TiO2-bearing blast furnace slag (TBF slag) was produced during the VTM and was used as iron ore in blast furnace (BF). The TBF slag contains approximately twenty percent of TiO2, leading to a higher melting point and worse fluidity. This type of slag could not be quenched by water as traditional BF slags. It has been developed as a process which involves dry granulation and carbonization. The TBF slag was loaded into a rotation plate, producing the slag particles in a certain range of size under centrifugal force cooling in air. Then the slag particles were reduced and carbonized by methane at 1473 and 1523 K. This process makes better use of sensible heat as well as recovery of Ti element in titanium-bearing BF slags.
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