製鋼反応の速度論的研究 : 熔鋼中の CO 気泡の生成と生成について

概要

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The reaction of carbon oxidation in liquid iron, C__-+O__-→CO (g) should be rapid in true terms of homogeneous chemical reaction. This can be confirmed by the theoretical reason of the absolute reaction rate theory. The most reasonable view for the rate determining step of the above reaction may be obtained from "diffusion film theory". 1) The thickness of the diffusion layer is briefly discussed in terms of Reynolds' number of liquid iron. The nucleation and growth of CO gaseous bubbles are explained from the point of view of the "theory of heterogeneous phase transformation" and the "theory of diffusion film." 2) If the rate of carbon-oxygen reaction in liquid iron were controlled by the process of "homogeneous one", the rate of this reaction energetically leads to too very large value compared to observed one. 3) The most reasonable process determining CO formation would be a transport of the dissolved carbon (C__-) and oxygen (O__-) to the existing surface of CO bubbles. 4) The favorable place of nucleation for CO bubble formation would be in the solid-metal interfaces such as the hearth-metal interfaes. 5) The rate of carbon oxidation in the open hearth has a weak tendency to diminish with decrease of carbon concentration.
社団法人日本鉄鋼協会の論文
1960-01-01