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Environment-friendly<br />
steel production<br />
Cooling water is a very important<br />
natural resource<br />
During the last 20 years the specifi c<br />
water requirement in m 3 per tonne<br />
of crude steel has been reduced by<br />
more than two thirds. Only about<br />
10.6 m 3 water per tonne of crude<br />
steel is now required. Cooling water<br />
is managed in a circulatory system<br />
Dust emissions from iron and steel<br />
production in Germany<br />
The generation of dust in kg per<br />
tonne of crude steel has been re-<br />
duced from about 9.0 kg to well<br />
below 0.5 kg since 1960. This has<br />
substantially improved air quality.<br />
at all steelworks, and after its use<br />
it is returned to nature cleaner than<br />
when it was taken up.<br />
Specific dust emission<br />
in kg/t crude steel<br />
17
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