炭素飽和溶鉄による溶融スラグ中の MnO 還元反応について

概要

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The rates of MnO reduction from slag by carbon saturated iron and Cu-Si alloy have been measured in the temperature range from 1500℃ to 1600℃ and the rate controlling steps have been determined by an electrochemical consideration. The results obtained are as follows : 1. Apparent activation energies of MnO reduction by carbon saturated iron are about 120, 80 and and 73 kcal/mol for 40CaO50SiO_210Al_2O_3+4.03MnO (slag A), 50CaO40SiO_210Al_2O_3+3.9MnO (Slag B), and 50CaO50Al_2O_3+2.3MnO(wt%) (slag C), respectively. 2. The rate of MnO reduction is promoted by the addition of Si to carbon saturated iron or Cu but is not increased by the addition of Si beyond 5 wt%, and its rate coefficient is K_m=180×10^<-5>(g/cm^2・min) for slag B at 1510℃. 3. The rate controlling step of MnO reduction by carbon saturated iron containing small amounts of Si is an anodic reaction of CO evolution and that by carbon saturated iron or Cu-Si alloy containing Si above 5 wt% is Mn diffusion in slag.
社団法人日本鉄鋼協会の論文
1975-01-01