Research & Development for Global Warming Prevention

Striving toward improving its world’s highest energy efficiency, NSSMC is taking on a challenge in the form of the “CO2 Ultimate Reduction in Steelmaking Process by Innovative Technology Project,” in addition to making efforts to reduce CO2 by conserving energy at steelworks.

CO2 Ultimate Reduction in Steelmaking Process by Innovative Technology for Cool Earth 50 (COURSE 50) Project

Since FY2008, four blast furnace steelmakers including us, and Nippon Steel & Sumikin Engineering, have been working on the “CO2 Ultimate Reduction in Steelmaking Process by Innovative Technology for Cool Earth 50 (COURSE 50) Project” aimed at developing dramatically new CO2 reduction technologies. Its goal is to reduce CO2 emissions in the steelmaking process by 30% through technology that reduces iron ore using hydrogen amplified coke oven gas to curb CO2 emissions from blast furnaces as well as technology that separates and recovers CO2 from blast furnace gas using unused exhaust heat in steelworks.

Technological Development of Innovative Steelmaking Process (COURSE 50)

Technological Development of Innovative Steelmaking Process (COURSE 50)

New coke furnace at Nagoya Works using the next-generation coke-making technology (“SCOPE 21”)

SCOPE 21 (Nagoya No.5 coke oven)

SCOPE 21 (Nagoya No.5 coke oven)

In May 2008, the first commercial model that fully embodies the world’s first next-generation coke-making technology “SCOPE 21” was installed at the No. 5 coke oven of our Oita Works. It has been operating smoothly. Based on this experience, the No. 5 coke oven of our Nagoya Works began operation in June 2013, as the second commercial model.

“SCOPE 21” is the technology developed under a national project of the Ministry of Economy, Trade and Industry to better address resource and energy problems. It shortens cokemaking time, improves coke quality, and incorporates various other innovative technologies. It is expected to allow wider use of low-grade raw coal and bring about significant CO2 reduction. According to the assumptions of the JISF’s action plans for a low carbon society, released by the Nippon Keidanren in January 2013, CO2 reduction is estimated to be about 900,000 tons a year in total, if all coke ovens in Japan are replaced at the time of facility renewal by 2020.

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