銑鐵中の燐迅速分析方法に就て
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概要
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As for the rapid analysis of phosphorus in pig iron, even the Japan Society for the Promotion of Scientific Research (Nippon Gakujutsu Shinko Kai) has not determined the standard method. In the phosphorus analysis in pig iron according to the J E S method, all the procedures are lone after samples have been dissolved with nitric acid and phosphorus oxidized by baking. This baking process is, however, not fit for the rapid analysis on account of its long time required for vaporization, drying and baking. In the rapid method for phosphorus determination of molten steel determined at the Japan Society for the Promotion of Scientific Research, the oxidation is done with permanganate, but it must be examined whether this method may be applied to pig iron. In the manufacture of low phosphorus pig in the basic open hearth at the authors' plant, several experiments concerning the rapid phosphorus determination of molten pig at the refining period were carried out and as the result the authors found that the permanganate oxidation method might be applied to pig iron and the estimation of phosphorus content by nephelometry should be performed by the dilution method. The authors used the method as a rapid phosphorus analysis in the above mentioned manufacturing experiments for low phosphorus pig. As the experiment has progressed, the time required for the analysis was reduced and at the same time the deviation from the value from the standard analysis became within the allowable range. Thus the authors succeeded to suggest this method as a practical standard.
- 社団法人日本鉄鋼協会の論文
- 1944-03-25