8th International Congress on Science and Technology of Ironmaking - ICSTI 2018

JFE Fukuyama No.5 D battery, since this battery started up, we struggle to control the temperatures of center flues and they fall to a low level. We estimated that the amount of air flow in center flues is less than gas flow because of the oven structure. Then, we entertained the way to increase air flow and invented the way we insert air with C ports which are used in only C gas inflammation. In this experiment, we simulated the changes of oven wall temperatures in inserting air and did at the actual equipment. As the result, we made sure of temperature rising nearly similar to our simulation. In this experiment, we put gas concentration meters in target flues and the concentration of CO is extremely less compared with before inserting air. So we resulted that gas in the center flues was burnt completely. As it is now, we flow air excessively to all flues due to covering the amount of air flow in the center flues. We can modify the air ratio by this improvement. So it attribute to reduce the amount of combustion gas and the heat consumption. Now we are going to conduct the equipment for inserting air to all center flues.