溶融塩中における定電圧電流法によるスラグの中和滴定 : ステンレス鋼スラグの塩基度の測定

概要

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Several slags were titrated biamperometrically by the following two methods. First, the sample slags were allowed to react with potassium dichromate in molten potassium nitrate at 400℃, and then the excess parts of the dichromate were titrated back with the sticks of the nitrate containing potassium carbonate in definite concentration. Secondly, the samples were allowed to react with vanadium pentoxide in the eutectic mixture of lithium, potassium, and sodium sulfates at 650℃, and the excess parts of the pentoxide were titrated back with the weighed portions of the carbonate. Well defined titration curves could be obtained, indicating the reversible electrode reaction of the acids (the dichromate and the pentoxide). The results of these titrations were enough reproducible. The amounts of the acids consumed by the sample slags were compared with the basicity indexes of each slags which were calculated from various methods based on the composition obtained by chemical analyses. Almost linear relationship could be obtained by both methods between the amounts of the acids consumed and the following basicity indexes ; they are basicity ratio, V-ratio, the basicity by GRANT and CHIPMAN, the basicity by KERLIE and that by MORI. These conclusions are nearly the same as those of the previous report.
社団法人日本鉄鋼協会の論文
1976-03-01