取鍋予熱装置燃焼効率の改善

概要

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As social concern in environmental issues had been rising, Kyoto protocol on preventing global warming came into force on February 16, 2005. In the protocol, Japan was required to cut the greenhouse gasses by 6 % compared to the year of 1990 during the five-year period of 2008-12. Placing the environmental issues as one of the most important issues through our business activities from a cooperate social responsibility standpoint, we recognize that reducing CO<SUB>2</SUB> emissions is our high priority task which should be achieved as early as possible. Pursuant to Voluntary Action Program for Environmental Protection by Steelmakers presented by the Japanese Iron and Steel Federation, we have been promoting various environmental activities to reduce CO<SUB>2</SUB> emission by 10 % compared to the year of 1990. In the steelmaking shop of our main plant, Chita plant, electricity accounts for large percentage of energy consumption followed by fuels such as heavy oil and kerosene. As in the fig.1, fuel cost for ladle preheater is 49.3 % of total fuel cost in Chita steelmaking shop. Being the key factor of reducing the whole fuel cost, yet its fuel consumption had not been greatly improved. Thanks to the introduction of regenerative burner on April 2005 and its optimization of combustion, fuel consumption of ladle preheater was improved. Outline of the improvements are described here.