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Reduction Behaviour of BOF type Slags by Solid Carbon
Author(s) -
Jung SungMo,
Do YoungJu,
Choi JuHan
Publication year - 2006
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.200606390
Subject(s) - slag (welding) , steelmaking , carbon fibers , crucible (geodemography) , metallurgy , materials science , wüstite , graphite , phosphorus , reduction (mathematics) , chemistry , oxide , mathematics , computational chemistry , geometry , composite number , composite material
Experiments were carried out on a system with artificially prepared slags in a graphite crucible, in order to examine the possibility of recycling BOF slags produced in the steelmaking process. More than 80% of FeO and P 2 O 5 was reduced within 20 minutes and the FeO reduction rate was greater than that of P 2 O 5 . P 2 O 5 reduction began after more than 60% of FeO was reduced. Increasing slag basicity enhanced the reduction of FeO and P 2 O 5 . Temperature also improved slag reduction. The overall reduction rate was controlled by the chemical reaction at the slag/carbon interface. The reduction rates of FeO and P 2 O 5 were second and first order with respect to their respective contents. Most of the reduced phosphorus is believed to vaporize in the form of P 2 gas.