Energy Material Balance

Energy and resource circulation in business activities

We are not only moving toward the achievement of zero emissions with minimal environmental impact and recycling internally generated materials, with utilizing the steel manufacturing process, but also actively recycling waste materials generated by society and other industries.

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Numbers represent FY2022 performance

Energy Material Balance

1 Purchased electricity (kWh) excludes electricity purchased from Cooperative Thermal Power Companies

Energy efficiency in steelmaking by country (2019)

Energy Material Balance

Efficient use of resources

  • Water resources
  • Of water used in cooling and cleaning of products and manufacturing facilities, approximately 90% is reprocessed and repeatedly used, while the remaining approximately 10%, which disappears mainly due to evaporation, is replaced.

  • By-product gas
  • y-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.

  • Use of exhaust heat
  • Exhaust heat, generated in the blast furnaces, sintering facilities, coke ovens, converters, and other facilities, is recovered and used in steam generation and power generation.

  • Electricity
  • Nippon Steel itself generates 88% of the electricity it uses at steelworks, 72% of which is from internally generated energy sources such as exhaust heat and by-product gases. In the future, we will also consider making more efficient facilities and switching fuel in order to further lower carbon generation.

  • By-products
  • By-products generated in steelmaking are recycled for reuse in the same process or for commercial use. We thus promote achieving zero emission and contribute to conservation of resources and energy.

  • Recycling of waste plastics
  • Approximately 200,000 tons per year, or about 30% of plastic containers and packaging collected from households nationwide, are fully recycled by a chemical processing method using coke furnaces.

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