Activities For Reducing CO2 and Conserving Energy During Production

Achieved the world’s top-class energy efficiency

From the time of the first oil crisis until around 1990, NSSMC intensively promoted continuous processing, exhaust heat recovery, and other measures, all to enable significant energy conservation. This has led to NSSMC and Japan’s steel industry as a whole achieving the world’s top-class energy efficiency.

Energy efficiency in steelmaking by country (2010)

Energy efficiency in steelmaking by country (2010)

Source: International Comparisons of Energy Efficiency (Sectors of Electricity Generation, Iron and steel, Cement), RITE, 2010 (The Japanese translation and numerical values were provided by the Japan Iron and Steel Federation.)

Continue CO2 emission reduction by implementing the three ecos

Based on the 32.2 billion metric tons of CO2 emissions from worldwide fossil fuel combustion in 2013, Japan’s product emissions represent 3.8% of global CO2 emissions from combustion of fossil fuels. Japan also accounts for 2.7% of worldwide greenhouse gas emission, according to estimates by the International Energy Agency in 2010.

According to the latest data available, Japan’s CO2 emissions from fossil fuel combustion amounted to 11.9 billion metric tons in 2014 and the industrial segment accounted for roughly one-third of that. As a member of the Japan Iron and Steel Federation, NSSMC has been playing a part in CO2 emission reduction of the industrial segment through implementing “eco processes,” and introducing “eco products” and “eco solutions” in Japan and overseas.

Breakdown of CO2 emissions from fossil fuel combustion

Breakdown of CO2 emissions from fossil fuel combustion

Energy conservation and CO2 emissions reduction

The most effective measure against global warming is energy conservation, and, therefore, NSSMC is striving to improve energy effi ciency by using energy generated in steelmaking processes, including power generation through use of by-product gas or exhaust heat recovery, or by reusing waste plastics and discarded tires. As a result of these efforts, the NSSMC and affiliated electric furnace companiesOsaka Steel Co., Ltd., Godo Steel, Ltd., Nippon Steel & Sumikin Stainless Steel Corporation, Nakayama Steel Works Ltd., Nippon Coke & Engineering Co., Ltd, three Cooperative Thermal Power Companies (Kimitsu, Tobata and Oita), and two Sanso Centers (Nagoya and Oita) consumed 1,048 PJ energy and emitted 91 million tonsA provisional value based on the assumption that the CO2 level in a unit of purchased electricity in FY2013 is the same as in FY2012. of CO2 in fiscal 2015.

Changes in energy consumption

NSSMC’s energy consumption

1 PJ indicates peta-joules (1015 joules).
 A joule is a unit of energy or amount of heat.
2 GJ indicates giga-joules (109 joules)

Energy-derived CO2 emissionsn

Energy-derived CO2 emissionsn

3 A provisional value based on the assumption that the CO2 level in a unit of purchased
 electricity in FY2015 is the same as in FY2014.

Japan Iron and Steel Federation’s action plans for a low carbon society

In the Voluntary Action Plans up to fiscal 2012, energy consumption for fiscal 2008 through fiscal 2012 was reduced by 11.1% relative to the fiscal 1990 level (CO2 emission in total was reduced by 11.2% in volume and CO2 emission per ton of crude steel was reduced by 10.0%), achieving participants’ goals.

From fiscal 2013 on, NSSMC has been participating in the Action Plans for the Realization of a Low-Carbon Society for further CO2 reduction by means of the three ecos. The industry-wide efforts are made to achieve the Phase I goal of CO2 reduction of 5 million tons by fiscal 2020 by fully implementing state-of-the-art technologies.

Promote innovative technology development

In addition to promoting the three ecos, the industry has worked at developing theinnovativesteelmaking process (COURSE50) from a medium-tolong-term CO2 emissionreduction perspective. From2023 onward, undertheActionPlansforaLow-CarbonSociety, theglobal warmingcountermeasureswillbesteadilyimplementedonthebasis of the three ecos and COURSE50.

Japan Iron and Steel Federation’s Action Plans for a Low-Carbon Society(“Three ecos and innovative technology development”)

Japan Iron and Steel Federation’s Action Plans for a Low Carbon Society

4 The target reductions in CO2 emission volume are based on a certain crude steel
 production assumption.

Use of bio fuel in independent power production results in CO2 reduction

Kashima Thermal Power Station

Kashima Thermal Power Station

Kashima Works’ 500,000 kW Thermal Power Station (an Independent Power Producer or IPP) began operation in 2007 and burns scrap wood chips, which are made from used wood pallets, as an alternative fuel to coal. In fiscal 2015, dregs from coffee making and wood chips, coming to approximately 12,150 tons in total, were used, resulting in a CO2 emission reduction of about 7,800 tons.

Woody biomass (Kamaishi)

Woody biomass (Kamaishi)

Kamaishi Works utilizes biomass resources such as leaves, and branches trimmed from lumber trees as biomass energy. This also contributes to forest improvement. In fiscal 2015, woody biomass of 11,206 tons was used, resulting in a CO2 reduction of about 10,874 tons.

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