ラジオアイソトープによる平炉鋼浴内の物質移動の検討

概要

論文の詳細を見る
^<198>Au sealed in a steel capsule was introduced into the center of metal bath in 130t B. O. H. F. In order to investigate the mass transfer in metal bath, steel samples were taken at 5 doors every 2 minutes after ^<198>Au addition, and to examine the uniformity between 1st and 2nd ladle, samples were taken from tap gutter during tapping, and from several moulds during teeming of these 2 ladles. The mass transfer in metal bath seemed to be caused mainly by turbulent diffution and additionally by forced flow with combustion flame. The time required to get nearly homogeneous ^<198>Au concentration-defined as the time in which mean square deviation of radioactivities at 5 doors from steady value reaches within 10 pct.-was 10 or 17 minutes in the case of boiling, 10 or 14 minutes in reboiling, 21 or 23 minutes in blocking. Furthermore, in the case of blocking, mixing rate was slowed down at 6 and 10 minutes after ^<198>Au and alloy addition : These periods were recognized to correspond with the complete dissolution of alloy from both data on radioactivity and analysis. When ^<198>Au was introduced in the end of metal bath (just below the burner) during boiling, it did not distribute homogeneously within 30 minutes. When ^<198>Au was introduced in the center of bath at 4 to 7 minutes before tap, concentration of ^<198>Au in 2nd ladle was 8 to 45 pct lower than that of 1st ladle in 4 of 5 cases.
社団法人日本鉄鋼協会の論文
1964-08-01