In Europe, steel making is heavily burdened
by the expense of dealing with waste by-products, especially zinc-
and lead-containing flue dust. Traditionally, this dust has had
to be hauled away for costly zinc and lead recovery.
Using computer modelling, chemical analysis
and hardware modifications, two European furnace operators and an
Italian university have developed a dust recycling system to be
integrated into the electrical arc furnace process. The new system,
which has now been fully implemented at both production sites, allows
an improvement in zinc recovery from 3% to 15%. The results represent
an important step on the way to better environmental compatibility
of European steel making.
One of the industrial operators has already
teamed up with a process engineering subsidiary to exploit the process
commercially via sales of hardware modifications and consulting
support in furnace locations where newer more vigorous environmental
constraints are in effect. Partners credit efficient management,
a high level of technical expertise and a remarkable collaboration
between industrial and research partners for the project's success.