オンサイト及びオンライン原子分光法の開発と鉄鋼分析への応用

概要

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This paper describes the development of on-site and on-line analyses and their applications to steel analysis. The problems accompanying laser ablation (LA) for different steel samples were resolved by adjusting the laser radiation conditions. The cw-Q-switched YAG laser was the best application system for steel analysis. The LA-ICP-AES was very useful for rapid and direct steel analysis in the process of steel-production control. The LA-ICP-MS resulted in a precision (RSD, %) ranging from 5% to 10% for most of the elements determined in steels. The on-line determination by the atomic-absorption spectrometric method was investigated to indirect monitoring of Mn in molten steel. The amount of Mn in the fine dust (<10 μm) reflected the Mn contentin molten steel. The mass ratio of Mn to Fe depended on the evaporation temperature. The Mn content in the molten steel could be estimated from the Mn and Fe evaporation masses under a constant evaporation temperature. The evaporated dust generated from the converter was sent through a cyclone and buffers to reject particles with diameters larger than 10 μm, and only fine particles were directly introduced into the flame atomizer. There was a good correlation between the Mn content of the molten steel and that in the fine dust.
社団法人日本分析化学会の論文
1999-04-05