抄録
Mass spectrometer for analyzing the exhaust gas was mounted at No. 2 BOF shop in NKK Fukuyama Works, and the level-up of refining under the computer control system using the exhaust gas information has been achieved. As the result, the continuous estimations of bath temperature, [O] and [C] etc. have been enabled, and the accuracy of end point control has been much improved. Moreover, rationalizing such as reductions of flux and steel making time has been achieved.
Especially the productivity has been remarkably improved and the production amount has reached to 330 000 t month under one vessel operation with two vessels.
