Energy Material Balance

Energy and resource circulation in business activities

As its main raw materials for steel production, Nippon Steel uses iron ore mined overseas, coal as for reduction of iron ore, and scrap generated by society.

By-product gases, such as coke oven gas generated when coal is thermally cracked in an oxygen-free environment in the coke manufacturing process and blast furnace gas generated from blast furnaces, are fully utilized as fuel gas for steel heating furnaces or energy sources for power generation plants on the premises of steelworks.

In addition, Nippon Steel itself generates 91% of the electricity it uses at steelworks, 72% of which is from internally generated energy sources such as waste heat and by-product gases. By not wasting but utilizing energy generated within the steelworks, we do our part to reduce CO2 emissions.

We are also engaged in the recycling of various types of by-products generated by society or other industries by utilizing our steelmaking processes that are carried out at high temperature and high pressure. In recent years, we have been actively recycling waste plastics and other waste materials. Reuse of these waste, which are traditionally landfilled or incinerated, as raw materials or energy in steelmaking processing is another way that we reduce CO2 emissions.

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Numbers represent FY2020 performance

Energy Material Balance

INPUT Material transition (unit: 10,000 tons)

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Input Material FY2015 FY2016 FY2017 FY2018 FY2019 FY2020
Iron ore 6,313 6,255 5,942 5,861 5,777 4,877
Coal 2,861 2,937 2,654 2,519 2,624 2,437
Waste plastics 20 21 21 18 21 21
Waste tire 8 7 7 7 7 8

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