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Effects of Mn ore on the Dephosphorization and Desulphurization in Hot Metal Pretreatment
Author(s) -
Kim SeongWoo,
Jung SungMo,
Rhee ChangHee,
Shim SangChul
Publication year - 2004
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.200405949
Subject(s) - decarburization , metallurgy , manganese , crucible (geodemography) , slag (welding) , materials science , metal , magnesium , pyrometallurgy , iron ore , chemistry , smelting , computational chemistry
In order to examine the possibility of utilizing Mn ore in the pretreatment process of liquid iron, experiments were carried out in a system with liquid iron and CaO‐SiO 2 ‐MgO‐Al 2 O 3 ‐FeO slag with additives (Mn ore and Fe 2 O 3 +MnO 2 ) in a magnesia crucible at 1673K. When Mn ore was added to the pretreatment slag, decarburization, desiliconization, dephosphorization and desulphurization proceeded simultaneously with the reduction of Mn ore. The reduction rate of MnO and the Mn concentration in the melt increased with increasing initial Si content. The maximum dephosphorization was obtained when the additive consisted of 66.6 mass% Fe 2 O 3 and 33.4 mass% MnO 2 . The desulphurization ratio increased with increasing the relative amount of MnO 2 in the additives. The amount of additives comprising Fe 2 O 3 and MnO 2 required for a targeted manganese content could be predicted using the mass balance. Effects of the additives on dephosphorization were also estimated.