CO ガスを介した黒鉛から溶鉄への炭素の移動

概要

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Previous work showed the great possibility of the silicon transfer to liquid iron through SiO gas, the rate of which is significantly dependent upon the carbon concentration in iron. To investigate whether or not this mechanism is really applicable to a practical blast furnace, the rate of the carbon transfer from graphite to liquid iron through CO gas was measured in the present work by use of a system consisting of three phases, graphite disc, iron melt and gaseous space between the former two. It is interesting to note that the rate of absorption of carbon was found to decrease with rise of temperature between 1550 and 1660℃. The whole process was interpreted by a mix-controlled model of the following three steps, namely the gasification of graphite, the diffusion of CO gas and the chemical reaction on the surface of melt. The numerical values of various kinetic constants as well as the relative chemical resistances of each step were determined experimentally.
社団法人日本鉄鋼協会の論文
1972-08-01