Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
Equilibria between Mn Alloy Melts Satulated with C and Various Kinds of Molten Slags and Calculation of the Activities
Akihiko TANAKA
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1980 Volume 66 Issue 10 Pages 1474-1483


In order to make clear the physical chemistry of the distribution reaction of Mn and Si between alloy melts and molten slags in the production furnace of high carbon ferromanganese and silicomanganese, the Mn-Si-Csat. and Mn-Fe-Si-Csat. alloy melts were equilibrated with MnO-SiO2, CaO-MnO-SiO2, CaO-MnO-Al2O3-SiO2 and CaO-MnO-Al2O3-MgO-SiO2 slags. From these experimental results, following thermochemical values were calculated by using the activities obtained previously by the author and some investigators;
(1) The activities of Si in Mn-Si-Csat. melts at 1500 and 1550°C, and in Mn-Fe-Si-Csat. melts at 1500°C.
(2) The activities of SiO2 in CaO-MnO-SiO2 molten slags at 1500°C.
(3) The values of aMnO2/aSiO2 in CaO-MnO-Al2O3-SiO2 molten slags at 1500°C.
(4) The values of aMnO2/aSiO2 in CaO-MnO-Al2O3-MgO-SiO2 molten slags equilibrated with Mn-Fe-Si-Csat. alloy melts at 1600°C.

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