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Vol.34, No.11, 1487 ~ 1495, 1996

Title

Manganese Reaction Equilibria between Molten Iron and CaO-MgO-Fe1O-SiO2-MnO-ΣMxOy, Slag Saturated with MgO

박종민 Jong Min Park , 조만형 Man Hyung Dzo

Abstract

The manganese reaction between the CaO-MgO-Fe1O-SiO2-MnO-ΣMxOy, slags saturated with MgO and molten iron was investigated by changing the MnO content from 2 to 30wt% in the temperature range of 1823K to 1973K. The activity coefficient of MnO and the manganese distribution were quantified in terms of the slag composition and temperature. The results obtained are as follows; 1) The activity coefficient of MnO is revealed to be dominated by the contents of Fe1O and MnO, and hardly affected by basicity and temperature. It can be written as follows; log γ MnO = -1.079(NMnO + 0.9NFeto) + 0.6394. 2) The equilibrium quotient kMn is controlled by basicity, and shows less correlation with contents of Fe1O and MnO. The following equation is obtained. logkMn = 0.00l[-1.651(%CaO) + 39.13(%MgO) + 4.64(%Fe1O) + 5.133(%MnO) + 11.86(%SiO2) - 99.7(%P2O5)] + 8086/T - 4.262

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