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Competitive Dissolution Mechanism of Sulfur in CaMnSilicate Melts: Structural View
Author(s) -
Park Joo Hyun
Publication year - 2013
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.201200210
Subject(s) - silicate , dissolution , sulfide , sulfur , slag (welding) , inorganic chemistry , materials science , chemistry , chemical engineering , mineralogy , metallurgy , organic chemistry , engineering
The sulfide capacities of the CaOSiO 2 MnO(Al 2 O 3 MgO) slags were measured at 1873 K over a wide composition range using a gas‐slag equilibration method. The effects of MnO content and the MnO ↔ CaO substitution on the sulfide capacity of molten slag were also investigated based on the structural view of silicate melts. In the multicomponent silicate melts containing high MnO (up to about 50 wt%), the sulfide capacity mainly increased with increasing MnO content. Also, the sulfide capacity and the activity of MnO showed a linear relationship with a slope of unity, indicating that MnO is dominant component controlling the sulfur dissolution behavior into CaMnsilicate melts. The sulfide capacity increased as MnO substituted for CaO in the high silica melts (>30 (±5) wt% SiO 2 ), whereas it decreased by increasing the MnO/CaO ratio in the low silica melts (<30(±5) wt% SiO 2 ). This tendency of sulfide capacity resulted in the clock‐wisely rotating iso‐capacity contours from MnO‐free side to MnO‐rich corner in CaMnsilicate melts. The dissolution mechanism of sulfur in CaMnsilicate melts can be explained by the “Competitive dissolution mechanism.”