 Investments
for the environment |
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Nisshin
Steel has actively pursued measures to prevent air pollution with
dust collectors, low-NOx combustion systems, and other means, and
measures to prevent water pollution such as reduction of the chemical
oxygen demand (COD) in waste water. Recently the company has made
investments to expand its dust collection equipment, install recycling
equipment with improved functionality for generated products, and
augment the dust-tight nets. Its total spending on environmental equipment
since the Pollution Measures Basic Law was established in 1967 comes
to 65.2 billion yen. |
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| Investments
for energy conservation |
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Since
the first oil crisis back in 1973, Nisshin Steel has been actively
promoting measures to save energy. Recently the company has invested
in improving thermal efficiency through the introduction of regeneration
systems, in improving the efficiency of oxygen manufacturing equipment,
and in augmenting byproduct gas collection holders. The cumulative
investment in energy conservation measures since the first oil crisis
in 1973 comes to 178.0 billion yen. |
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Expansion
of steelmaking
environmental dust collection
equipment 1 (Kure Works) |
Expansion
of sintering
environmental dust collection
equipment 2 (Kure Works) |
Buildup
of dust-tight nets
(Shunan Works) |
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<Reference>
Concerning the effect of energy conservation investment (company's
performance)
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| Energy
conservation measures |
Energy
cutback |
CO2cutback |
| Type
of energy |
TJ/year |
thousand
ton CO2/year |
| Blast
furnace top gas pressure recovery power generation equipment
(2 units, total 18 MW) |
electric power |
1440 |
55 |
| Converter
gas waste heat recovery equipment (converter 18 ton/heat) |
steam |
430 |
26 |
| Increased
efficiency of oxygen generation equipment (No.7 machine, 24,000
Nm3/h) |
electric power |
122 |
5 |
| Conversion
of the regeneration burners (amount of improvement from conventional
burners) |
Molten pig
iron and steel pan refractory materials drying |
heavy oil
A |
77 |
5 |
| Dry exhaust
gas combustion |
city gas |
37 |
2 |
| Heating
furnace high-temperature slab insertion (hot charge rate 75%) |
heavy oil
C |
1210 |
86 |
TJ (terajoules): T (tera-) means
1012, J (joule) is a unit of energy
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