In order to reduce emissions of sulfur oxides (SOx) and nitrogen oxides (NOx), Nippon Steel is taking measures such as using low-sulfur fuel, adopting low NOx generating burners and installing effective equipment, including equipment that reduces SOx and NOx emissions. To curb emissions of soot and dust generated from factories and raw material yard, we try to enhance their collection by installing dust collectors and prevent scattering of particles by installing windscreens, windbreak trees and sprinklers, based on air pollution risk analysis through scientific simulation. We also conduct constant monitoring and regular patrols to ensure that no abnormal emissions are released.

Since April 2018, mercury concentration in emission gas has been regulated in Japan. At our facilities mercury contained in waste gas is effectively captured by dust collectors or is absorbed by activated carbon.

We have confirmed that all of our facilities, including waste incinerators which are regulated for mercury concentration, conform to the regulations.

For sintering furnaces and electric arc furnaces for steelmaking, we voluntarily manage their mercury concentration in accordance with a voluntary management standard, issued by the Japan Iron and Steel Federation (JISF) in April 2018. We carried out voluntary measurement and confirmed conformity with the voluntary management standard at all facilities subject to the voluntary initiatives in fiscal 2020. These results and evaluations are disclosed on the JISF’s website in around September every year. Through such efforts, we strive to prevent mercury emission into the air.

Environmental measures at steelworks

Prevention of scattering of materials and dust

Countermeasures against air pollution