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The steel industry is Japan's largest energy-consuming industry, accounting for about 11% of the
country's final energy consumption. Although energy consumed by the industry in fiscal 2004
increased 1.5% over the previous year, to 2,371 PJ, it was down 4.4% from the base year of the
JISF's voluntary action program for environmental protection (the goal: a 10% reduction in energy
consumption in fiscal 2010 from fiscal 1990).
While energy-derived CO2 emissions in fiscal 2004 were up 1.3% over the previous year, at an
estimated 184.70 million tons, they were down 5.2% compared with the level of the base year.
Japanese steelmakers recover exhaust energy and make effective use of it within their works.
Gases discharged from coke ovens, blast furnaces, and basic oxygen furnaces are recovered as
byproduct gases and used as fuel for reheating furnaces and power plants. Energy recovered in
2005 reached 783 PJ. Also recovered is exhaust energy, excluding byproduct gases, from such
equipment as coke dry quenching (CDQ) units and top pressure recovery turbines (TRTs). Energy
thus recovered is used as steam or electric power. These energy resources recovered in fiscal
2004 amounted to 123 PJ.
Furthermore, much of the electric power consumed by steelmakers is supplied by their own captive
power generation plants. In 2005, they consumed 66.2 billion kWh of electricity, and 47% of this
wattage, or 31.2 billion kWh, was generated by captive plants.
The Energy data (PDF)
