炭素飽和溶鉄によるシリカ還元反応の電気化学的考察

概要

論文の詳細を見る
An electrochemical approach to the kinetics of multicomponent reactions occurring at the molten slag-metal interface has been proposed and applied to kinetic study of silica reduction. 1. Polarization curves of several elements dissolved in iron were evaluated from the formation free energy of oxides and available electrochemical data. 2. The limiting current density for the diffusion of SiO_2 in slag was estimated as nearly 150∿200 mA/cm^2 from the experimental results. 3. The facts that the rate of silica reduction is accelerated with the increase of the slag-graphite interface area was clearly explained using the polarization curves. 4. The rate of silica reduction approaches to the maximum, that is, the limiting current, under the large cathodic polarization which could be realized by the increase of slag-graphite interface area, decrease of oxygen activity or applying the external electric potential. In this condition, the rate of silica (Si^<4+>) diffusion in slag is the rate-limiting step. Such an electrochemical approach as proposed here might be much useful for the treatments of the multicomponent reaction kinetics in iron-steelmaking processes.
社団法人日本鉄鋼協会の論文
1968-12-01