Award for British Steel's desulphurising process

British Steel's new iron desulphurisation plant at its Lackenby site on Teesside has won the 1992 PA Golden Leaf Award which aims to show that responsible environmental management can create commercial benefit. The £7.5 million investment has greatly reduced particulate emissions from the process, and will be recouped within three years.

Until this summer, molten iron was desulphurised at Lackenby by injection of a calcium carbide reagent into the 320-tonne capacity torpedo ladles in which it arrived from a nearby site. This process took place outdoors. The iron was then poured into an open-topped ladle and the sulphur-containing slag skimmed off the surface.

The injection process generated large quantities of iron oxide fume. Some of this was discharged through a stack w

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