溶銅の水素による脱酸機構について
1971 年 87 巻 1006 号 p. 1059-1064
詳細
1971 年 87 巻 1006 号 p. 1059-1064
The present study was undertaken to investigate the kinetics of deoxidation of liquid copper by hydrogen. The oxygen concentration of liquid copper was measured continuously by EMF of the following oxygen concentration cell.
Pt, Cr2O3+ Al2O3, O (in Cu)/ZrO2(+CaO)/ air, Pt
A series of experiments was carried out under the following conditions, the initial oxygen content was about 1500-2000ppm, the mixing ratio of argon and hydrogen gases was in the range of PH2=0.05-1 atm, and the temperature was changed 1153, 1192 and 1251°C.
From experimental results the rate of deoxidation was found to be dependent on the partial pressure of hydrogen and was to be independent on the temperature. Also it was found that the present experimental results could not be explained by a simple mechanism, such as the diffusion of oxygen or hydrogen atom in liquid copper or the chemical reaction controll. Such a fast deoxidation rate was assumed to be based on the stirring of liquid copper even if the deoxidation reaction proceeded out at the comparatively quiescent state.
